Tin smelting intermediate material processing system and processing method thereof
阅读说明：本技术 一种锡冶炼中间物料处理系统及其处理方法 (Tin smelting intermediate material processing system and processing method thereof ) 是由 袁海滨 唐都作 杨斌 徐万立 宋兴诚 谢云华 张璋 张志胤 郭祥勇 梁军 陈云 于 2021-10-09 设计创作，主要内容包括：本发明公开了一种锡冶炼中间物料处理系统及其处理方法,该处理系统包括：烟化炉、沉降电炉、贫渣水淬池、冰铜包、粉煤喷吹系统、烟气处理系统和二次给风系统；所述烟化炉分别与所述沉降电炉、粉煤喷吹系统、烟气处理系统以及二次给风系统连接；所述沉降电炉还分别与所述贫渣水淬池、冰铜包连接。本发明公开的处理系统及方法能够高效的将锡与其他物料分类分离回收,解决复杂含锡冶炼中间物料销售运输难、折价销售的经济损失,将危废转变为增值有价物料进行综合回收。(The invention discloses a tin smelting intermediate material processing system and a processing method thereof, wherein the processing system comprises: the system comprises a fuming furnace, a settling electric furnace, a lean slag water quenching tank, a copper matte layer, a pulverized coal injection system, a flue gas treatment system and a secondary air supply system; the fuming furnace is respectively connected with the settling electric furnace, the pulverized coal injection system, the flue gas treatment system and the secondary air supply system; the electric settling furnace is also respectively connected with the lean slag water quenching tank and the copper matte bag. The treatment system and the method disclosed by the invention can efficiently classify, separate and recycle tin and other materials, solve the economic loss of difficult sale and transportation and price reduction of complex tin-containing smelting intermediate materials, and convert dangerous wastes into value-added valuable materials for comprehensive recovery.)
1. A tin smelting intermediate material processing system is characterized by comprising: the system comprises a fuming furnace, a settling electric furnace, a lean slag water quenching tank, a copper matte layer, a pulverized coal injection system, a flue gas treatment system and a secondary air supply system;
the fuming furnace is respectively connected with the settling electric furnace, the pulverized coal injection system, the flue gas treatment system and the secondary air supply system;
the electric settling furnace is also respectively connected with the lean slag water quenching tank and the copper matte bag.
2. The processing system of claim 1, further comprising: a furnace top belt feeding system and a hook scale system; the tin smelting intermediate material comprises hot tin slag, a tin-copper containing mineral material and lump coal; the hot tin slag is added into the fuming furnace through the hook balance system, and the tin-copper containing ore material and lump coal are added into the fuming furnace through the furnace top belt feeding system.
3. The processing system according to claim 2, wherein the fuming furnace is provided with a hot tin slag feeding chute, a furnace top feeding port and a high-temperature melt chute; a matte discharge chute and a lean slag discharge chute are arranged on the electric settling furnace;
the hook scale system is matched with the hot tin dross feeding chute for operation; the furnace top belt feeding system is matched with the furnace top feeding hole for operation; the high-temperature melt chute is communicated with a molten pool in the electric settling furnace;
the matte discharging chute is communicated with the interior of the matte coating; the lean slag discharge chute is communicated with the interior of the lean slag water quenching tank.
4. The treatment system of claim 2, wherein the flue gas treatment system comprises: a dust collecting device, a tin electric furnace, a vacuum furnace, a top blowing furnace, a vacuum tin chute, a vacuum tin mold, an antimony bismuth alloy chute, an antimony bismuth alloy mold and a high antimony bismuth crude tin chute;
the dust collecting device is respectively communicated with the tin electric furnace and the top-blowing furnace;
the tin electric furnace is also communicated with the vacuum furnace through the high-stibium bismuth crude tin chute; the vacuum tin mold is positioned at the tail end of the vacuum tin chute and is used for containing vacuum tin; the antimony bismuth alloy mould is positioned at the tail end of the antimony bismuth alloy chute and is used for containing antimony bismuth alloy;
the top-blown converter is provided with a top-blown converter slag hole and a top-blown converter crude tin hole; the hot tin slag transferring slag ladle is positioned below the top blowing furnace slag hole and is used for containing hot tin slag.
5. Method for treating tin smelting intermediate material with a treatment system according to any one of claims 1-4, characterized in that it comprises the following steps:
(a) preparing a fuming furnace material: before the fuming furnace waits for charging, keeping the temperature of the flue gas in a hearth at 600-800 ℃;
(b) receiving hot tin dross: the hot tin dross transferring slag ladle is hoisted through a hook weigher system, the hot tin dross is guided into the fuming furnace through a hot tin dross feeding chute, and the hook weigher system weighs and measures the weight of the hot tin dross;
(c) feeding through a belt at the top of the furnace: after hot tin slag in the fuming furnace is received, starting a furnace top belt feeding system, adding a tin-copper-containing mineral material and lump coal into the fuming furnace, and uniformly adding within 60-120 min;
(d) heating and smelting: after the feeding of the fuming furnace top belt system is finished, stopping the furnace top belt feeding system, improving the oxygen enrichment concentration of the secondary air supply system, improving the pulverized coal feeding amount of the pulverized coal injection system, accelerating the heating and melting of cold materials in the fuming furnace, keeping the temperature of the flue gas of the hearth at 1050-1150 ℃, and controlling the Fe/SiO of the fuming furnace molten pool2Keeping the temperature for 30-60 min when the temperature is 1.0-1.4;
(e) fuming and volatilizing tin: heating, smelting and preserving heat until cold materials in the fuming furnace are completely melted, inserting a sample rod into a molten pool in the fuming furnace to take a molten sample to perform element rapid assay analysis, starting the fuming furnace to sulfurize and volatilize molten tin according to the element rapid assay analysis result, adding vulcanizing agent volatilized tin into the fuming furnace through a furnace top belt feeding system, synchronously closing the oxygen enrichment of a secondary air supply system, calculating the adding amount of the vulcanizing agent according to the S/(Sn + Cu) molar ratio of 1:3, wherein the surplus coefficient is 1.2-1.3, sampling, assaying and analyzing after the adding amount of the vulcanizing agent is finished within 90-120 min, taking the volatilized tin as the end point when the tin content of the high-temperature molten body in the fuming furnace is less than or equal to 0.3 wt.%, and otherwise, continuously adding the vulcanizing agent volatilized tin to the high-temperature molten body according to the calculation difference that the tested tin is more than 0.3 wt.% until the tin content is less than or equal to 0.3 wt.%;
(f) separating copper and lean slag by a settling electric furnace: when the initial charge is used in the precipitation electric furnace, Fe/SiO is used2A molten pool is manufactured in 0.9-1.3 of furnace slag, and the temperature of the molten pool in the electric settling furnace is kept at 1200-1230 ℃; discharging the high-temperature melt of the fuming furnace after the fuming volatile tin reaches the standard into a sedimentation electric furnace through a high-temperature melt chute, continuously preserving the heat of the sedimentation electric furnace until the copper content of the upper-layer lean slag is less than or equal to 0.7 wt.%, then firstly opening a matte opening at the lower part of the sedimentation electric furnace, discharging the matte in the sedimentation electric furnace to a matte bag through a matte discharging chute, immediately blocking the matte opening when the matte opening discharges the lean slag, and stopping the matte discharging; lean slag in the settling electric furnace is discharged from a chute through the upper part of the settling electric furnacePutting the lean slag into a lean slag water quenching tank for water quenching, and separating slag from water after water quenching to obtain the lean slag for sale; when the lean slag is discharged, the sampling rod is used for detecting the depth of a molten pool in the electric settling furnace all the time, when the lean slag in the molten pool is remained for 300-500 mm, a lean slag port is blocked, the discharge of the lean slag is stopped, and the remained lean slag is used for heat preservation of the electric settling furnace so that the electric settling furnace can receive the next high-temperature melt of the fuming furnace.
6. The treatment method according to claim 5, wherein the step (c) comprises feeding the mineral material containing tin and copper into the fuming furnace, wherein the mineral material containing tin and copper comprises 0-65 wt% of Sn, 0-24 wt% of Cu, 0-30 wt% of S, 0-20 wt% of Sb, 0-20 wt% of Bi, 0-7 wt% of As, 0-30 g/t of Au and 0-800 g/t of Ag, and the mineral material containing tin and copper comprises one or more of a tin-containing mineral material, a copper-tin-containing material and a high-sulfur copper concentrate; the hot tin slag contains 2-6 wt% of Sn, 18-25 wt% of Fe and 13-25 wt% of Si as main element components.
7. The process according to claim 6, characterized in that the hot tin dross: tin-containing ore material: the weight ratio of the copper-tin-containing material to the high-sulfur copper concentrate is (30-70): (0-35): (0-20): (0-30) batching, wherein the batching principle is based on the Sn content of the mixture which is comprehensively fed into the furnace being 3-10 wt.%, and the Cu content is not required to be controlled.
8. The process according to claim 5, wherein the lump coal accounts for 3 to 5% by mass of the tin smelting intermediate material.
9. The process of claim 5, wherein in step (e) the sulfidising agent is one or more of sulphur, pyrite or high sulphur copper concentrate; according to the component difference of the tin smoke dust obtained by fuming and volatilizing in the step (e), when the antimony and bismuth in the tin smoke dust are higher than 5 wt.%, the high-antimony bismuth tin smoke dust is sent to a tin electric furnace for reduction smelting to produce high-antimony bismuth crude tin, the high-antimony bismuth crude tin is sent to a vacuum furnace for refining, and byproducts of antimony bismuth alloy and vacuum tin products are produced and can be directly sold; when the content of antimony and bismuth in the tin smoke dust is lower than 5 wt.%, the low-antimony bismuth tin smoke dust is directly returned to the top-blown furnace of the main production flow for reduction smelting.
10. The treatment method according to claim 5, wherein after the copper matte is connected with the high-temperature copper matte melt of the settling electric furnace in the step (f), the copper matte is completely solidified after the copper matte is naturally cooled for 72-96 h, the solidified copper matte in the copper matte is turned over, the upper part of the material in the copper matte is slag, and the lower part of the material is qualified copper matte; sampling and analyzing the slag, merging the slag into lean slag after water quenching for sale if the copper content of the slag is less than or equal to 0.7 wt.%, and crushing the slag and returning the crushed slag to a settling electric furnace for melting and recovering the copper if the copper content of the slag is more than 0.7 wt.%; and crushing the qualified matte, and selling the crushed matte.
Technical Field
The invention relates to the technical field of tin and copper recovery, in particular to a tin smelting intermediate material processing system and a processing method thereof.
Background
In the smelting production process of tin, some valuable or harmful impurity elements enter the smelting process along with associated tin concentrate and are brought into the subsequent impurity removal process, so that various complex tin-containing hazardous waste materials are produced.
At present, the major production flow equipment for smelting tin concentrate at home and abroad comprises an Osmant top-blown converter, a crude tin impurity removal pot, a tin electric furnace, a fluidized bed furnace, a fuming furnace, an electrothermal continuous crystallizer, a vacuum furnace, a tin electrolytic bath system and the like, wherein after the tin concentrate is smelted by the Osmant top-blown converter, the produced crude tin is sent to the impurity removal pot, and various tin-containing materials are produced after multiple impurity removal, wherein tin-containing sulfur copper slag produced by copper removal belongs to hazardous waste materials; in addition, along with the deep impurity removal of subsequent crude tin, a certain amount of tin-containing anode slime is generated in the tin electrolysis process, the tin-containing anode slime is rich in impurity elements of antimony and bismuth, and precious metals of gold and silver, and also contains a certain amount of copper, the tin-containing grade is high, the tin-containing anode slime also belongs to a dangerous waste material, the material is similar to the tin-containing sulfur copper slag, and if the tin-containing anode slime is directly sold, the profit loss and the like caused by low valuation coefficient are also faced.
In order to realize 'dry eating and squeezing' of the complex tin-containing smelting intermediate material, solve the problems of difficult sale and transportation of dangerous waste materials, low economic loss of valuation coefficient and the like, combine the tin smelting production technology and the actual situation of equipment, and research and develop a comprehensive recovery technology with low cost, high efficiency and environmental protection, which is a technical problem faced by the current tin smelting technical personnel and urgently needed to be solved.
Disclosure of Invention
In view of the above, the invention provides a tin smelting intermediate material processing system and a processing method thereof, so that tin and other materials can be efficiently classified, separated and recovered, the economic losses of difficult sales and transportation and price reduction of complex tin-containing smelting intermediate materials are solved, and hazardous wastes are converted into value-added valuable materials for comprehensive recovery.
In order to achieve the purpose, the invention adopts the following technical scheme:
a tin smelting intermediate material processing system comprises: the system comprises a fuming furnace, a settling electric furnace, a lean slag water quenching tank, a copper matte layer, a pulverized coal injection system, a flue gas treatment system and a secondary air supply system;
the fuming furnace is respectively communicated with the settling electric furnace, the pulverized coal injection system, the flue gas treatment system and the secondary air supply system;
the electric settling furnace is also respectively communicated with the lean slag water quenching tank and the copper matte bag.
Preferably, the method further comprises the following steps: a furnace top belt feeding system and a hook scale system; the tin smelting intermediate material comprises hot tin slag, a tin-copper containing mineral material and lump coal; the hot tin slag is added into the fuming furnace through the hook balance system, and the tin-copper containing ore material and lump coal are added into the fuming furnace through the furnace top belt feeding system.
Preferably, the fuming furnace is provided with a hot tin slag feeding chute, a furnace top feeding hole and a high-temperature melt chute; a matte discharge chute and a lean slag discharge chute are arranged on the electric settling furnace;
the hook scale system is matched with the hot tin dross feeding chute for operation; the furnace top belt feeding system is matched with the furnace top feeding hole for operation; the high-temperature melt chute is communicated with a molten pool in the electric settling furnace;
the matte discharging chute is communicated with the interior of the matte coating; the lean slag discharge chute is communicated with the interior of the lean slag water quenching tank.
Preferably, the flue gas treatment system comprises: a dust collecting device, a tin electric furnace, a vacuum furnace, a top blowing furnace, a vacuum tin chute, a vacuum tin mold, an antimony bismuth alloy chute, an antimony bismuth alloy mold and a high antimony bismuth crude tin chute;
the dust collecting device is respectively communicated with the tin electric furnace and the top-blowing furnace;
the tin electric furnace is also communicated with the vacuum furnace through the high-stibium bismuth crude tin chute; the vacuum tin mold is positioned at the tail end of the vacuum tin chute and is used for containing vacuum tin; the antimony bismuth alloy mould is positioned at the tail end of the antimony bismuth alloy chute and is used for containing antimony bismuth alloy;
the top-blown converter is provided with a top-blown converter slag hole and a top-blown converter crude tin hole; the hot tin slag transferring slag ladle is positioned below the top blowing furnace slag hole and is used for containing hot tin slag.
The invention also discloses a method for processing the tin smelting intermediate material by adopting the processing system, which comprises the following steps:
(a) preparing a fuming furnace material: before the fuming furnace waits for charging, keeping the temperature of the flue gas in a hearth at 600-800 ℃;
(b) receiving hot tin dross: the hot tin dross transferring slag ladle is hoisted through a hook weigher system, the hot tin dross is guided into the fuming furnace through a hot tin dross feeding chute, and the hook weigher system weighs and measures the weight of the hot tin dross;
(c) feeding through a belt at the top of the furnace: after hot tin slag in the fuming furnace is received, starting a furnace top belt feeding system, adding a tin-copper-containing mineral material and lump coal into the fuming furnace, and uniformly adding within 60-120 min;
(d) heating and smelting: after the feeding of the fuming furnace top belt system is finished, stopping the furnace top belt feeding system, improving the oxygen enrichment concentration of the secondary air supply system, improving the pulverized coal feeding amount of the pulverized coal injection system, accelerating the heating and melting of cold materials in the fuming furnace, keeping the temperature of the flue gas of the hearth at 1050-1150 ℃, and controlling the Fe/SiO of the fuming furnace molten pool2Keeping the temperature for 30-60 min when the temperature is 1.0-1.4;
(e) fuming and volatilizing tin: heating, smelting and preserving heat until cold materials in the fuming furnace are completely melted, inserting a sample rod into a molten pool in the fuming furnace to take a molten sample to perform element rapid assay analysis, starting the fuming furnace to sulfurize and volatilize molten tin according to the element rapid assay analysis result, adding vulcanizing agent volatilized tin into the fuming furnace through a furnace top belt feeding system, synchronously closing the oxygen enrichment of a secondary air supply system, calculating the adding amount of the vulcanizing agent according to the S/(Sn + Cu) molar ratio of 1:3, wherein the surplus coefficient is 1.2-1.3, sampling, assaying and analyzing after the adding amount of the vulcanizing agent is finished within 90-120 min, taking the volatilized tin as the end point when the tin content of the high-temperature molten body in the fuming furnace is less than or equal to 0.3 wt.%, and otherwise, continuously adding the vulcanizing agent volatilized tin to the high-temperature molten body according to the calculation difference that the tested tin is more than 0.3 wt.% until the tin content is less than or equal to 0.3 wt.%;
(f) separating copper and lean slag by a settling electric furnace: when the initial charge is used in the precipitation electric furnace, Fe/SiO is used2A molten pool is manufactured in 0.9-1.3 of furnace slag, and the temperature of the molten pool in the electric settling furnace is kept at 1200-1230 ℃; passing through high temperature melt of fuming furnace after fuming volatile tin reaches the standard in step (e)Discharging the warm melt chute into a settling electric furnace, continuously preserving the temperature of the settling electric furnace until the copper content of the upper-layer lean slag is less than or equal to 0.7 wt.%, then firstly burning a matte opening at the lower part of the settling electric furnace, discharging matte in the settling electric furnace to a matte bag through a matte discharging chute, immediately blocking the matte opening when the matte opening discharges the lean slag, and stopping discharging the matte; discharging the lean slag in the settling electric furnace into a lean slag water quenching tank for water quenching through a lean slag discharge chute at the upper part of the settling electric furnace, and separating slag from water after water quenching to obtain the lean slag for sale; when the lean slag is discharged, the sampling rod is used for detecting the depth of a molten pool in the electric settling furnace all the time, when the lean slag in the molten pool is remained for 300-500 mm, a lean slag port is blocked, the discharge of the lean slag is stopped, and the remained lean slag is used for heat preservation of the electric settling furnace so that the electric settling furnace can receive the next high-temperature melt of the fuming furnace.
Preferably, the components of the tin-copper-containing mineral material added into the fuming furnace in the step (c) are 0-65 wt% of Sn, 0-24 wt% of Cu, 0-30 wt% of S, 0-20 wt% of Sb, 0-20 wt% of Bi, 0-7 wt% of As, 0-30 g/t of Au and 0-800 g/t of Ag, and the tin-copper-containing mineral material is one or more of tin-containing mineral material, copper-tin-containing material and high-sulfur copper concentrate; the hot tin slag comprises 2-6 wt% of Sn, 18-25 wt% of Fe and 13-25 wt% of Si as main element components; the tin-containing ore material refers to a material only containing tin and not containing copper, the copper-tin-containing material refers to a material simultaneously containing tin and copper, and the high-sulfur copper concentrate refers to a material only containing copper and not containing tin.
Preferably, according to the hot tin dross: tin-containing ore material: the weight ratio of the copper-tin-containing material to the high-sulfur copper concentrate is (30-70): (0-35): (0-20): (0-30) batching, wherein the batching principle is based on the Sn content of the mixture which is comprehensively fed into the furnace being 3-10 wt.%, and the Cu content is not required to be controlled.
Preferably, the lump coal accounts for 3-5% of the mass of the tin smelting intermediate material.
Preferably, the sulfidizing agent in step (e) is one or more of sulphur, pyrite or high-sulphur copper concentrate; according to the component difference of the tin smoke dust obtained by fuming and volatilizing in the step (e), when the antimony and bismuth in the tin smoke dust are higher than 5 wt.%, the high-antimony bismuth tin smoke dust is sent to a tin electric furnace for reduction smelting to produce high-antimony bismuth crude tin, the high-antimony bismuth crude tin is sent to a vacuum furnace for refining, and byproducts of antimony bismuth alloy and vacuum tin products are produced and can be directly sold; when the content of antimony and bismuth in the tin smoke dust is lower than 5 wt.%, the low-antimony bismuth tin smoke dust is directly returned to the top-blown furnace of the main production flow for reduction smelting.
Preferably, after the copper matte is connected with the high-temperature copper matte melt of the settling electric furnace in the step (f), the copper matte is completely solidified after the copper matte bag is naturally cooled for 72-96 hours, the solidified copper matte in the copper matte is turned over, the upper part of the material in the copper matte is furnace slag, and the lower part of the material is qualified copper matte; sampling and analyzing the slag, merging the slag into lean slag after water quenching for sale if the copper content of the slag is less than or equal to 0.7 wt.%, and crushing the slag and returning the crushed slag to a settling electric furnace for melting and recovering the copper if the copper content of the slag is more than 0.7 wt.%; and crushing the qualified matte, and selling the crushed matte.
Compared with the prior art, the invention has the beneficial effects that: the method adopts the existing mature sulfuration fuming technology and equipment to realize the high-efficiency and low-cost separation and recovery of tin and other valuable elements in the complex tin-containing materials, the tin is collected in the form of tin smoke dust, and the tin is further processed by different main production flow devices according to the difference of impurity content of the tin smoke dust; in addition, the characteristics of various complex tin-containing materials are combined, the tin fuming needs sulfur, the characteristic of the copper matte for trapping precious metals is utilized, high-sulfur copper concentrate is added into the fuming furnace in the fuming volatilization process, and the high-sulfur copper concentrate plays the dual roles, so that the sulfur in the copper concentrate is fully utilized, and the purchase cost of a vulcanizing agent is saved; after the tin in the high-temperature melt is fully fuming and volatilized, the high-temperature melt containing copper and other precious metals is left, and is discharged into a sedimentation electric furnace, after the copper-containing melt and the upper layer of slag are naturally settled, the upper layer of low-tin and low-copper ferrosilicon slag is separated, the lower layer of ferrosilicon slag is a copper matte layer rich in precious metals, the upper layer of low-tin and low-copper ferrosilicon slag is subjected to water quenching and is sold for cement factories for recycling, and the copper matte is discharged into a special ladle to be cooled and crushed for sale and creation. Therefore, the whole process of the invention does not generate any solid waste or dangerous waste, the tin material returns to the main production process without generating any economic loss, the technical process is simple and efficient, the recovery rate of valuable metals is high, and the high-value full recovery can be realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic view of a tin smelting intermediate material processing system disclosed in the present invention;
FIG. 2 is a process flow diagram of a tin smelting intermediate material processing system disclosed by the invention.
In fig. 1:
the device comprises a fuming furnace 1, a furnace top belt feeding system 2, a hook scale system 3, a hot tin slag feeding chute 4, a hot tin slag transferring slag ladle 5, a furnace top feeding port 6, a settling electric furnace 7, a lean slag water quenching tank 8, an ice copper coating 9, an ice copper discharging chute 10, a lean slag discharging chute 11, a high-temperature melt chute 12, a pulverized coal injection system 13, a dust collecting device 14, a tin electric furnace 15, a vacuum furnace 16, a top blowing furnace 17, a vacuum tin chute 18, a vacuum tin mold 19, an antimony bismuth alloy chute 20, an antimony bismuth alloy mold 21, a high-antimony bismuth crude tin chute 22, a top blowing furnace slag port 23 and a top blowing furnace crude tin port 24.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
As shown in fig. 1, the present embodiment provides a tin smelting intermediate material processing system, including: the system comprises a fuming furnace 1, a settling electric furnace 7, a lean slag water quenching tank 8, a copper matte bag 9, a pulverized coal injection system 13, a flue gas treatment system and a secondary air supply system;
the fuming furnace 1 is respectively connected with the settling electric furnace 7, the pulverized coal injection system 13, the flue gas treatment system and the secondary air supply system;
the electric settling furnace 7 is also respectively connected with a lean slag water quenching tank 8 and a copper matte bag 9.
A furnace top belt feeding system 2 and a hook scale system 3; the tin smelting intermediate materials comprise hot tin slag, tin-copper-containing mineral materials and lump coal; hot tin slag is added into the fuming furnace 1 through the hook weighing system 3, and the tin-copper containing ore material and lump coal are added into the fuming furnace 1 through the furnace top belt feeding system 2.
The fuming furnace 1 is provided with a hot tin slag feeding chute 4, a furnace top feeding port 6 and a high-temperature melt chute 12; a matte discharge chute 10 and a lean slag discharge chute 11 are arranged on the electric settling furnace 7;
the hook scale system 3 is matched with the hot tin dross feeding chute 4 for operation; the furnace top belt feeding system 2 is matched with the furnace top feeding hole 6 for operation; the high-temperature melt chute 12 is communicated with a molten pool in the electric settling furnace 1;
the copper matte discharge chute 10 is communicated with the interior of the copper matte bag 9; the lean slag discharge chute 11 is communicated with the interior of the lean slag water quenching tank 8.
The flue gas treatment system comprises: a dust collecting device 14, a tin electric furnace 15, a vacuum furnace 16, a top blowing furnace 17, a vacuum tin chute 18, a vacuum tin mold 19, an antimony bismuth alloy chute 20, an antimony bismuth alloy mold 21 and a high antimony bismuth crude tin chute 22;
the dust collecting device 14 is respectively communicated with a tin electric furnace 15 and a top-blowing furnace 17;
the tin electric furnace 15 is also communicated with the vacuum furnace 16 through a high-stibium bismuth crude tin chute 22; the vacuum tin mold 19 is positioned at the tail end of the vacuum tin chute 18 and is used for containing vacuum tin; the antimony bismuth alloy die 21 is positioned at the tail end of the antimony bismuth alloy chute 20 and used for containing antimony bismuth alloy;
the top-blown converter 17 is provided with a top-blown converter slag hole 23 and a top-blown converter crude tin hole 24; the hot tin slag transferring slag ladle 5 is positioned below the top-blown slag hole 23 and is used for containing hot tin slag.
Example 2
By using the processing system provided in example 1, taking the fuming furnace as an example to process 100 tons of high-temperature melt, the processing method is as follows:
(a) preparing a fuming furnace material: before the fuming furnace waits for charging, the temperature of the flue gas in the hearth is kept at 600 ℃;
(b) receiving hot tin dross: the hot tin slag transferring slag ladle is hoisted through a hook scale system, the hot tin slag is introduced into the fuming furnace through a hot tin slag feeding chute, and the hook scale weighs the hot tin slag;
(c) feeding through a belt at the top of the furnace: after hot tin slag in the fuming furnace is received, starting a furnace top belt feeding system, adding and mixing a tin-containing mineral material, a copper-tin-containing material, high-sulfur copper concentrate and lump coal into the fuming furnace, and uniformly adding within 60 min;
(d) heating and smelting: stopping feeding the belt at the top of the fuming furnace after the belt at the top of the fuming furnace finishes feeding, improving the oxygen enrichment concentration of a secondary air supply system, improving the pulverized coal feeding amount of a pulverized coal injection system, accelerating the heating and melting of cold materials in the fuming furnace, keeping the temperature of the smoke of a hearth at 1050 ℃, and controlling the Fe/SiO of a melting pool of the fuming furnace2Keeping the temperature for 30min when the temperature is 1.0;
(e) fuming and volatilizing tin: heating, smelting and preserving heat until the cold material in the fuming furnace is completely melted, inserting a sample rod into the melting pool of the fuming furnace to take a melt sample for rapid element analysis, starting the fuming furnace to sulfurize and volatilize the melt tin according to the rapid element analysis result, adding vulcanizing agent into the fuming furnace through a furnace top belt feeding system to volatilize tin, synchronously closing oxygen enrichment of a secondary air supply system, and displaying that the melt contains Sn1.5wt.% and Cu0.75wt.% according to an analysis result, wherein the adding amount of the vulcanizing agent is calculated according to the S/(Sn + Cu) molar ratio of 1:3, the surplus coefficient is 1.2, namely, the mass of S is 100 tons multiplied by 0.0097 to 0.97 ton, industrial sulfur containing 99% of S is used as a vulcanizing agent, namely, the industrial sulfur is required to be added in an amount of 0.97 ton/99 percent to 0.98 ton, 0.98 ton of pyrite is completely added in 90min, sampling, testing and analyzing are carried out, and the tin volatilization has reached the end point when the tin content of the high-temperature melt in the furnace is less than or equal to 0.3 wt%;
(f) separating copper and lean slag by a settling electric furnace: when the initial charge is used in the precipitation electric furnace, Fe/SiO is used2A molten pool is manufactured in 0.9 of slag, and the temperature of the molten pool in the electric settling furnace is kept at 1200 ℃; discharging the high-temperature melt of the fuming furnace with the fuming volatile tin reaching the standard in the step (e) into a settling electric furnace through a high-temperature melt chute, and continuously preserving the temperature of the settling electric furnace until the copper content of the upper-layer lean slag is less than or equal to 0.7 wt.%Preferentially boiling a matte port at the lower part of the electric precipitation furnace, discharging matte in the electric precipitation furnace to a matte bag, immediately blocking the matte port when the matte port is discharged with lean slag, and stopping discharging the matte; discharging the lean slag in the settling electric furnace into a water quenching tank through a lean slag port at the upper part of the settling electric furnace for water quenching, and separating slag from water after water quenching to obtain the lean slag which can be sold to a cement plant; when the lean slag is discharged, the sampling rod is used for detecting the depth of a molten pool in the electric settling furnace, when the lean slag in the molten pool is remained for 300mm, a lean slag port can be blocked, the discharge of the lean slag is stopped, and the remained lean slag is used for heat preservation of the electric settling furnace so as to be convenient for the electric settling furnace to receive the next high-temperature melt of the fuming furnace;
adding 3 kinds of tin-containing mineral materials with the components of Sn3 wt.%, Cu0 wt.%, S7 wt.%, Sb0 wt.%, Bi0 wt.%, As0 wt.%, Au0g/t, Ag0g/t, copper-tin-containing materials with the components of Sn65 wt.%, Cu18 wt.%, S10 wt.%, Sb0 wt.%, Bi0 wt.%, As 1.0 wt.%, Au0g/t, Ag 8g/t, high-sulfur copper concentrates with the components of Sn0 wt.%, Cu15 wt.%, S28 wt.%, Sb0 wt.%, Bi0 wt.%, As0 wt.%, Au 2g/t, Ag150g/t into the fuming furnace, and mixing; the main element components of the hot tin slag are Sn2 wt.%, Fe18 wt.% and Si13 wt.%;
adding mixed tin-containing mineral materials, copper-tin-containing materials and high-sulfur copper concentrate into the fuming furnace in the step (c) for proportion control, weighing and metering the hot tin slag according to the hook scale in the step (b), and weighing and metering the hot tin slag according to the hot tin slag: tin-containing ore material: the weight ratio of the copper-tin-containing material to the high-sulfur copper concentrate is 48%: 27%: 12%: 13 percent of the mixture is mixed, and the mixing principle is that the Sn content of the mixture which is comprehensively fed into a furnace is 10 wt.%, and the Cu content reaches 3.97 wt.%; the mass of the lump coal accounts for 3 percent of the mass of the intermediate material for smelting tin;
when the antimony and bismuth in the tin smoke dust obtained by fuming and volatilizing in the step (e) are lower than 5 wt%, the low-antimony bismuth tin smoke dust is directly returned to a top-blown furnace of the main production flow for reduction smelting;
after the copper matte is connected with a high-temperature copper matte melt of a settling electric furnace, naturally cooling a copper matte package for 72 hours, completely solidifying the copper matte, turning over the solidified copper matte in the copper matte, wherein the upper part of the material in the copper matte is furnace slag, and the lower part of the material is qualified copper matte; sampling and analyzing the slag, and if the copper content of the slag is less than or equal to 0.7 wt.%, merging the slag into lean slag after water quenching for sale to a cement plant; and crushing the qualified matte, and selling the crushed matte.
In example 2, the direct yield of Sn contained in the integrated material fed into the furnace can reach 95%, 22 wt.% grade matte is obtained, the direct yield of Cu is 94%, the direct yield of Au and Ag paved by matte is 96%, and no hazardous waste residue material is generated.
Example 3
Using the treatment system provided in example 1, taking the fuming furnace as an example for treating 120 tons of high-temperature melt:
(a) preparing a fuming furnace material: before the fuming furnace waits for charging, keeping the temperature of the flue gas in a hearth at 700 ℃;
(b) receiving hot tin dross: the hot tin slag transferring slag ladle is hoisted through a hook scale system, the hot tin slag is introduced into the fuming furnace through a hot tin slag feeding chute, and the hook scale weighs the hot tin slag;
(c) feeding through a belt at the top of the furnace: after hot tin slag in the fuming furnace is received, starting a furnace top belt feeding system, adding and mixing a tin-containing mineral material, a copper-tin-containing material, high-sulfur copper concentrate and lump coal into the fuming furnace, and uniformly adding within 70 min;
(d) heating and smelting: stopping feeding the belt at the top of the fuming furnace after the belt at the top of the fuming furnace finishes feeding, improving the oxygen enrichment concentration of a secondary air supply system, improving the pulverized coal feeding amount of a pulverized coal injection system, accelerating the heating and melting of cold materials in the fuming furnace, keeping the temperature of the flue gas of a hearth at 1100 ℃, and controlling the Fe/SiO of a melting pool of the fuming furnace2Keeping the temperature for 40min when the temperature is 1.1;
(e) fuming and volatilizing tin: heating, smelting and preserving heat until the cold material in the fuming furnace is completely melted, inserting a sample rod into the melting pool of the fuming furnace to take a melt sample for rapid element analysis, starting the fuming furnace to sulfurize and volatilize the melt tin according to the rapid element analysis result, adding vulcanizing agent into the fuming furnace through a furnace top belt feeding system to volatilize tin, synchronously closing oxygen enrichment of a secondary air supply system, and displaying that the melt contains Sn1 wt% and Cu0.85wt% according to an analysis result, wherein the adding amount of the vulcanizing agent is calculated according to the S/(Sn + Cu) molar ratio of 1:3, the surplus coefficient is 1.2, that is, the weight of S is 120 tons multiplied by 0.0087 to 1.044 tons, pyrite with 35 percent of S is used as a vulcanizing agent, namely, the amount of the pyrite to be added is 1.044 ton/35 percent to 2.98 ton, 2.98 ton of pyrite is completely added within 90min, sampling, testing and analyzing are carried out, and the tin volatilization process reaches the end point when the tin content of the high-temperature melt in the furnace is less than or equal to 0.3 wt.%;
(f) separating copper and lean slag by a settling electric furnace: when the initial charge is used in the precipitation electric furnace, Fe/SiO is used2A molten pool is manufactured from 1.0 of slag, and the temperature of the molten pool in the electric settling furnace is kept at 1210 ℃; discharging the high-temperature melt of the fuming furnace after the fuming volatile tin reaches the standard into a settling electric furnace through a high-temperature melt chute, continuously preserving the temperature of the settling electric furnace until the copper content of the upper-layer lean slag is less than or equal to 0.7 wt.%, preferentially opening a matte port at the lower part of the settling electric furnace, discharging the matte in the settling electric furnace to a matte bag, and immediately blocking the matte port when the lean slag is discharged from the matte port to stop discharging the matte; discharging the lean slag in the settling electric furnace into a water quenching tank through a lean slag port at the upper part of the settling electric furnace for water quenching, and separating slag from water after water quenching to obtain the lean slag which can be sold to a cement plant; when the lean slag is discharged, the sampling rod is used for detecting the depth of a molten pool in the electric settling furnace, when the lean slag in the molten pool is remained for 400mm, a lean slag port can be blocked, the discharge of the lean slag is stopped, and the remained lean slag is used for heat preservation of the electric settling furnace so as to be convenient for the electric settling furnace to receive the next high-temperature melt of the fuming furnace;
in the step (c), the tin-containing mineral material components of Sn5 wt.%, Cu0wt wt.%, S0 wt.%, Sb0 wt.%, Bi0wt wt.%, As0 wt.%, Au0g/t, Ag0g/t, and the copper-tin-containing material components of Sn60 wt.%, Cu15 wt.%, S8 wt.%, Sb0wt wt.%, Bi0 wt.%, As1.5wt.%, Au0g/t, Ag10g/t, high-sulfur copper concentrate components of Sn0 wt.%, Cu12wt wt.%, S30 wt.%, Sb0 wt.%, Bi0wt wt.%, As2wt wt.%, Au1g/t, Ag180g/t are added into the fuming furnace, and mixed with 3 kinds of the above; the main element components of the hot tin slag are Sn3 wt%, Fe25 wt% and Si25 wt%;
adding a mixed tin-containing mineral material, a copper-tin-containing material and a high-sulfur copper concentrate into the fuming furnace, and controlling the proportion, wherein the weight of the hot tin slag weighed by the hook scale in the step (b) is controlled according to the proportion: tin-containing ore material: the weight ratio of the copper-tin-containing material to the high-sulfur copper concentrate is 70%: 10%: 10%: 10 percent of the mixture is proportioned, the proportioning principle takes that the Sn content of the mixture which is comprehensively fed into a furnace is 8.6 wt.% as the reference, and the Cu content reaches 2.70 wt.%; the mass of the lump coal accounts for 5 percent of that of the intermediate material for smelting tin;
when the antimony and bismuth in the tin smoke dust obtained by fuming and volatilizing in the step (e) are lower than 5 wt%, the low-antimony bismuth tin smoke dust is directly returned to a top-blown furnace of the main production flow for reduction smelting;
after the copper matte is connected with a high-temperature copper matte melt of a settling electric furnace, naturally cooling a copper matte package for 72 hours, completely solidifying the copper matte, turning over the solidified copper matte in the copper matte, wherein the upper part of the material in the copper matte is furnace slag, and the lower part of the material is qualified copper matte; sampling and analyzing the slag, and if the copper content of the slag is less than or equal to 0.7 wt.%, merging the slag into water-quenched lean slag for sale to a cement plant; and crushing the qualified matte, and selling the crushed matte.
In example 3, the direct yield of Sn contained in the integrated material fed into the furnace can reach 96%, 18 wt.% grade matte is obtained, the direct yield of Cu is 92%, the direct yield of Au and Ag paved by matte is 95%, and no hazardous waste residue material is generated.
Example 4
Using the treatment system provided in example 1, taking as an example a fuming furnace in terms of treating an amount of 80 tons of high temperature melt:
(a) preparing a fuming furnace material: before the fuming furnace waits for charging, the temperature of the flue gas in the hearth is kept at 800 ℃;
(b) receiving hot tin dross: the hot tin slag transferring slag ladle is hoisted through a hook scale system, the hot tin slag is introduced into the fuming furnace through a hot tin slag feeding chute, and the hook scale weighs the hot tin slag;
(c) feeding through a belt at the top of the furnace: after hot tin slag in the fuming furnace is received, starting a furnace top belt feeding system, adding and mixing a tin-containing mineral material, a copper-tin-containing material, high-sulfur copper concentrate and lump coal into the fuming furnace, and uniformly adding within 90 min;
(d) heating and smelting: stopping feeding the belt at the top of the fuming furnace after the belt at the top of the fuming furnace finishes feeding, improving the oxygen enrichment concentration of a secondary air supply system, improving the pulverized coal feeding amount of a pulverized coal injection system, accelerating the heating and melting of cold materials in the fuming furnace, keeping the temperature of the smoke gas of a hearth at 1150 ℃, and controlling the Fe/SiO of a melting pool of the fuming furnace2＝1.3，Keeping the temperature for 50 min;
(e) fuming and volatilizing tin: after the temperature is raised, smelting and heat preservation are carried out until cold materials in the fuming furnace are completely melted, a sample rod is inserted into a melting pool of the fuming furnace to take a melt sample for element rapid analysis, according to the result of the element rapid analysis, the analysis result shows that the tin content of the high-temperature melt is 0.24 wt% because the S/(Sn + Cu) molar ratio of the high-temperature melt is more than 1:3, namely the tin volatilization of the high-temperature melt in the fuming furnace reaches the end point, and the operation of adding a vulcanizing agent is not needed any more;
(f) separating copper and lean slag by a settling electric furnace: when the initial charge is used in the precipitation electric furnace, Fe/SiO is used2A molten pool is manufactured in the slag of 1.2, and the temperature of the molten pool in the electric settling furnace is kept at 1220 ℃; discharging the high-temperature melt of the fuming furnace after the fuming volatile tin reaches the standard into a settling electric furnace through a high-temperature melt chute, continuously preserving the temperature of the settling electric furnace until the copper content of the upper-layer lean slag is less than or equal to 0.7 wt.%, preferentially opening a matte port at the lower part of the settling electric furnace, discharging the matte in the settling electric furnace to a matte bag, and immediately blocking the matte port when the lean slag is discharged from the matte port to stop discharging the matte; discharging the lean slag in the settling electric furnace into a water quenching tank through a lean slag port at the upper part of the settling electric furnace for water quenching, and separating slag from water after water quenching to obtain the lean slag which can be sold to a cement plant; when the lean slag is discharged, the sampling rod is used for detecting the depth of a molten pool in the electric settling furnace, when the lean slag in the molten pool is left for 500mm, a lean slag port can be blocked, the discharge of the lean slag is stopped, and the remaining lean slag is used for heat preservation of the electric settling furnace so as to be convenient for the electric settling furnace to receive the next high-temperature melt of the fuming furnace;
in the step (c), the tin-containing mineral material components of Sn3 wt%, Cu0 wt%, S0 wt%, Sb0 wt%, Bi0wt wt%, As0 wt%, Au0g/t, Ag0g/t, and the low-copper-content tin material components of Sn35 wt%, Cu1.5 wt%, S0 wt%, Sb16wt wt%, Bi16wt wt%, As7.0 wt%, Au26.8g/t, Ag600g/t, and the high-sulfur copper concentrate components of Sn0 wt%, Cu18wt, S30 wt%, Sb0 wt%, Bi0wt wt%, As2wt, 5390 Au0g/t, Ag150g/t, and 3 kinds of mixed collocation are added into the fuming furnace; the main element components of the hot tin slag are Sn5 wt%, Fe18 wt% and Si13 wt%;
adding a mixed tin-containing mineral material, a copper-tin-containing material and a high-sulfur copper concentrate into the fuming furnace, and controlling the proportion, wherein the weight of the hot tin slag weighed by the hook scale in the step (b) is controlled according to the proportion: tin-containing ore material: the weight ratio of the copper-tin-containing material to the high-sulfur copper concentrate is 47%: 27%: 20%: 6 percent of the mixture is proportioned, the proportioning principle takes that the Sn content of the mixture which is comprehensively fed into a furnace is 10 wt.% as the reference, and the Cu content reaches 1.30 wt.%; the mass of the lump coal accounts for 4 percent of that of the intermediate material for smelting tin;
smoke and volatilize the obtained tin smoke dust in step (e), when the antimony and bismuth contained in the tin smoke dust is higher than 5 wt.%, the high antimony bismuth tin smoke dust is sent to a tin electric furnace for reduction smelting to produce high antimony bismuth crude tin, the high antimony bismuth crude tin is sent to a vacuum furnace for refining, and byproducts antimony bismuth alloy and vacuum tin products are produced and can be sold directly;
after the copper matte is connected with a high-temperature copper matte melt of a settling electric furnace, naturally cooling a copper matte package for 96 hours, completely solidifying the copper matte, turning over the solidified copper matte in the copper matte package, wherein the upper part of the material in the copper matte package is furnace slag, and the lower part of the material is qualified copper matte; sampling and analyzing the slag, and if the copper content of the slag is less than or equal to 0.7 wt.%, merging the slag into water-quenched lean slag for sale to a cement plant; and crushing the qualified matte, and selling the crushed matte.
In example 4, the direct yield of Sn contained in the integrated material fed into the furnace can reach 96.5%, 15 wt.% grade matte is obtained, the direct yield of Cu is 96%, the direct yield of Au and Ag paved by matte is 96.5%, and no hazardous waste residue material is generated.
Example 5
Using the processing system provided in example 1, taking the fuming furnace as an example for processing 100 tons of high-temperature melt:
(a) preparing a fuming furnace material: before the fuming furnace waits for charging, the temperature of the flue gas in the hearth is kept at 800 ℃;
(b) receiving hot tin dross: the hot tin slag transferring slag ladle is hoisted through a hook scale system, the hot tin slag is introduced into the fuming furnace through a hot tin slag feeding chute, and the hook scale weighs the hot tin slag;
(c) feeding through a belt at the top of the furnace: after hot tin slag in the fuming furnace is received, starting a furnace top belt feeding system, adding and mixing a tin-containing mineral material, a copper-tin-containing material, high-sulfur copper concentrate and lump coal into the fuming furnace, and uniformly adding within 120 min;
(d) heating and smelting: stopping feeding the belt at the top of the fuming furnace after the belt at the top of the fuming furnace finishes feeding, improving the oxygen enrichment concentration of a secondary air supply system, improving the pulverized coal feeding amount of a pulverized coal injection system, accelerating the heating and melting of cold materials in the fuming furnace, keeping the temperature of the smoke gas of a hearth at 1150 ℃, and controlling the Fe/SiO of a melting pool of the fuming furnace2Keeping the temperature for 60min when the temperature is 1.4;
(e) fuming and volatilizing tin: after the temperature is raised, smelting and heat preservation are carried out until cold materials in the fuming furnace are completely melted, a sample rod is inserted into a melting pool of the fuming furnace to take a melt sample for element rapid analysis, according to the result of the element rapid analysis, the analysis result shows that the tin content of the high-temperature melt is 0.22 wt% because the S/(Sn + Cu) molar ratio of the high-temperature melt is more than 1:3, namely the tin volatilization of the high-temperature melt in the fuming furnace reaches the end point, and the operation of adding a vulcanizing agent is not needed any more;
(f) separating copper and lean slag by a settling electric furnace: when the initial charge is used in the precipitation electric furnace, Fe/SiO is used2A molten pool is manufactured in the slag of 1.3, and the temperature of the molten pool in the electric settling furnace is kept at 1230 ℃; discharging the high-temperature melt of the fuming furnace after the fuming volatile tin reaches the standard into a settling electric furnace through a high-temperature melt chute, continuously preserving the temperature of the settling electric furnace until the copper content of the upper-layer lean slag is less than or equal to 0.7 wt.%, preferentially opening a matte port at the lower part of the settling electric furnace, discharging the matte in the settling electric furnace to a matte bag, and immediately blocking the matte port when the lean slag is discharged from the matte port to stop discharging the matte; discharging the lean slag in the settling electric furnace into a water quenching tank through a lean slag port at the upper part of the settling electric furnace for water quenching, and separating slag from water after water quenching to obtain the lean slag which can be sold to a cement plant; when the lean slag is discharged, the sampling rod is used for detecting the depth of a molten pool in the electric settling furnace, when the lean slag in the molten pool is left for 500mm, a lean slag port can be blocked, the discharge of the lean slag is stopped, and the remaining lean slag is used for heat preservation of the electric settling furnace so as to be convenient for the electric settling furnace to receive the next high-temperature melt of the fuming furnace;
in the step (c), the tin-containing mineral material components of Sn3 wt%, Cu0 wt%, S0 wt%, Sb0 wt%, Bi0wt wt%, As0 wt%, Au0g/t, Ag0g/t, and the low-copper-content tin material components of Sn35 wt%, Cu1.5 wt%, S0 wt%, Sb20wt wt%, Bi20wt wt%, As7.0 wt%, Au30g/t, Ag800g/t, high-sulfur copper concentrate components of Sn0 wt%, Cu24wt wt%, S30 wt%, Sb0 wt%, Bi0wt wt%, As2wt Au, 0g/t, Ag150g/t, and 3 kinds of mixed collocation are added into the fuming furnace; the main element components of the hot tin slag are Sn3 wt%, Fe25 wt% and Si25 wt%;
adding a mixed tin-containing mineral material, a copper-tin-containing material and a high-sulfur copper concentrate into the fuming furnace, and controlling the proportion, wherein the weight of the hot tin slag weighed by the hook scale in the step (b) is controlled according to the proportion: tin-containing ore material: the weight ratio of the copper-tin-containing material to the high-sulfur copper concentrate is 33.5%: 33.5%: 3%: 30 percent of the mixture is proportioned, the proportioning principle takes that the Sn content of the mixture fed into the furnace is 3 wt.% as the reference, and the Cu content reaches 7.35 wt.%; the mass of the lump coal accounts for 4 percent of that of the intermediate material for smelting tin;
fuming and volatilizing the tin smoke dust obtained in the step (e), wherein the content of antimony and bismuth in the tin smoke dust is higher than 5 wt%, so that the high-antimony bismuth tin smoke dust is sent to a tin electric furnace for reduction smelting to produce high-antimony bismuth crude tin, the high-antimony bismuth crude tin is sent to a vacuum furnace for refining, and byproducts of antimony bismuth alloy and vacuum tin products are produced and can be directly sold;
after the copper matte is connected with a high-temperature copper matte melt of a settling electric furnace, naturally cooling a copper matte package for 96 hours, completely solidifying the copper matte, turning over the solidified copper matte in the copper matte package, wherein the upper part of the material in the copper matte package is furnace slag, and the lower part of the material is qualified copper matte; sampling and analyzing the slag, and if the copper content of the slag is less than or equal to 0.7 wt.%, merging the slag into water-quenched lean slag for sale to a cement plant; and crushing the qualified matte, and selling the crushed matte.
In example 5, the direct yield of Sn contained in the integrated material fed into the furnace can reach 97%, 28 wt.% grade matte is obtained, the direct yield of Cu is 98%, the direct yields of Au and Ag paved by matte are 97.5%, and no hazardous waste residue material is generated.
Example 6
Using the treatment system provided in example 1, taking the fuming furnace as an example for treating 120 tons of high-temperature melt:
(a) preparing a fuming furnace material: before the fuming furnace waits for charging, the temperature of the flue gas in the hearth is kept at 800 ℃;
(b) receiving hot tin dross: the hot tin slag transferring slag ladle is hoisted through a hook scale system, the hot tin slag is introduced into the fuming furnace through a hot tin slag feeding chute, and the hook scale weighs the hot tin slag;
(c) feeding through a belt at the top of the furnace: after hot tin slag in the fuming furnace is received, starting a furnace top belt feeding system, adding and mixing a tin-containing mineral material, a copper-tin-containing material, high-sulfur copper concentrate and lump coal into the fuming furnace, and uniformly adding within 120 min;
(d) heating and smelting: stopping feeding the belt at the top of the fuming furnace after the belt at the top of the fuming furnace finishes feeding, improving the oxygen enrichment concentration of a secondary air supply system, improving the pulverized coal feeding amount of a pulverized coal injection system, accelerating the heating and melting of cold materials in the fuming furnace, keeping the temperature of the smoke gas of a hearth at 1150 ℃, and controlling the Fe/SiO of a melting pool of the fuming furnace2Keeping the temperature for 60min when the temperature is 1.4;
(e) fuming and volatilizing tin: heating, smelting and preserving heat until the cold material in the fuming furnace is completely melted, inserting a sample rod into the melting pool of the fuming furnace to take a melt sample for rapid element analysis, starting the fuming furnace to sulfurize and volatilize the melt tin according to the rapid element analysis result, adding vulcanizing agent into the fuming furnace through a furnace top belt feeding system to volatilize tin, synchronously closing oxygen enrichment of a secondary air supply system, and displaying that the melt contains Sn2.5wt.% and Cu0.65wt.% according to an analysis result, wherein the adding amount of the vulcanizing agent is calculated according to the S/(Sn + Cu) molar ratio of 1:3, the surplus coefficient is 1.2, that is, it is required that the mass of S is 120 tons × 0.0125 tons to 1.5 tons, pyrite containing 35% of S is used as a sulfidizing agent, namely, the amount of the pyrite to be added is 1.5 ton/35 percent to 4.28 ton, the 4.28 ton pyrite is completely added within 90min, sampling, testing and analyzing are carried out, and the tin volatilization reaches the end point when the tin content of the high-temperature melt in the furnace is less than or equal to 0.3 wt%;
(f) separating copper and lean slag by a settling electric furnace: when the initial charge is used in the precipitation electric furnace, Fe/SiO is used2A molten pool is manufactured in the slag of 1.3, and the temperature of the molten pool in the electric settling furnace is kept at 1230 ℃; discharging the high-temperature melt of the fuming furnace after the fuming volatile tin reaches the standard into a settling electric furnace through a high-temperature melt chute, continuously preserving the temperature of the settling electric furnace until the copper content of the upper-layer lean slag is less than or equal to 0.7 wt.%, preferentially opening a matte port at the lower part of the settling electric furnace, discharging the matte in the settling electric furnace to a matte bag, and immediately blocking the matte port when the lean slag is discharged from the matte port to stop discharging the matte; in the settlement electric furnaceDischarging the lean slag into a water quenching tank through a lean slag port at the upper part of the settling electric furnace for water quenching, and separating slag from water after water quenching to obtain the lean slag which can be sold to a cement plant; when the lean slag is discharged, the sampling rod is used for detecting the depth of a molten pool in the electric settling furnace, when the lean slag in the molten pool is left for 500mm, a lean slag port can be blocked, the discharge of the lean slag is stopped, and the remaining lean slag is used for heat preservation of the electric settling furnace so as to be convenient for the electric settling furnace to receive the next high-temperature melt of the fuming furnace;
in the step (c), the tin-containing mineral material components of Sn3 wt%, Cu0 wt%, S0 wt%, Sb0 wt%, Bi0wt wt%, As0 wt%, Au0g/t, Ag0g/t, the high-copper-content tin material components of Sn65 wt%, Cu18 wt%, S10 wt%, Sb0 wt%, Bi0 wt%, As0wt wt%, Au5g/t, Ag350g/t, the high-sulfur copper concentrate components of Sn0 wt%, Cu24 wt%, S28 wt%, Sb0 wt%, Bi0wt wt%, As2 wt%, Au0g/t, Ag150g/t are added into the fuming furnace, and 3 kinds of mixture are mixed; the main element components of the hot tin slag are Sn3.5 wt.%, Fe26 wt.% and Si24 wt.%;
adding a mixed tin-containing mineral material, a copper-tin-containing material and a high-sulfur copper concentrate into the fuming furnace, and controlling the proportion, wherein the weight of the hot tin slag weighed by the hook scale in the step (b) is controlled according to the proportion: tin-containing ore material: the weight ratio of the copper-tin-containing material to the high-sulfur copper concentrate is 48.3%: 27.6%: 11.5%: 12.6 percent of the mixture is proportioned, the proportion principle is based on that the Sn content of the mixture which is comprehensively fed into a furnace is 9.99 wt.%, and the Cu content reaches 5.10 wt.%; the mass of the lump coal accounts for 3 percent of the mass of the intermediate material for smelting tin;
fuming and volatilizing to obtain tin smoke dust, wherein the content of antimony and bismuth in the tin smoke dust is lower than 5 wt%, and the low-antimony bismuth tin smoke dust directly returns to a top-blown furnace in the main production flow for reduction smelting;
after the copper matte is connected with a high-temperature copper matte melt of a settling electric furnace, naturally cooling a copper matte package for 96 hours, completely solidifying the copper matte, turning over the solidified copper matte in the copper matte package, wherein the upper part of the material in the copper matte package is furnace slag, and the lower part of the material is qualified copper matte; sampling and analyzing the slag, and merging the slag with copper content less than or equal to 0.7 wt.% into water-quenched lean slag for sale to cement plants; and crushing the qualified matte, and selling the crushed matte.
In example 6, the direct yield of Sn contained in the integrated material fed into the furnace can reach 97%, 24 wt.% grade matte is obtained, the direct yield of Cu is 98.5%, the direct yield of Au and Ag paved by matte is more than 97%, and no hazardous waste residue material is generated.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.