阅读说明：本技术 一种高品位冰铜吹炼快速传质传热系统及其方法 (High-grade matte converting rapid mass and heat transfer system and method thereof ) 是由 杨应宝 陈全坤 张体富 段亚明 罗京 余小吕 刘小飞 丁永华 郎学云 于 2020-06-24 设计创作，主要内容包括：一种高品位冰铜吹炼快速传质传热系统,包括底吹转炉,所述底吹转炉上设置有热态冰铜进口、烟气出口、底吹供气喷嘴；所述热态冰铜进口设置在底吹转炉的一端侧壁上；所述烟气出口设置在底吹转炉顶部；所述底吹供气喷嘴设置由若干个,分别设置在底吹转炉的底部；热态冰铜进口上活动设置有热态冰铜进料管；所述热态冰铜进料管倾斜设置,热态冰铜进口连接热态冰铜进料管较低的一端,热态冰铜由热态冰铜进料管进入底吹转炉；所述烟气出口上活动设置有烟道；烟道的侧壁上设置有冷料进料口；所述冷料进料口设置有若干个；冷料进料口上设置有冷料进料通道；所述冷料进料通道倾斜设置；冷料进料通道较低一端与冷料进料口连接。(A high-grade matte converting rapid mass and heat transfer system comprises a bottom blowing converter, wherein a thermal matte inlet, a flue gas outlet and a bottom blowing gas supply nozzle are arranged on the bottom blowing converter; the hot matte inlet is arranged on the side wall of one end of the bottom blowing converter; the flue gas outlet is arranged at the top of the bottom blowing converter; the bottom blowing gas supply nozzles are arranged at the bottom of the bottom blowing converter respectively; a thermal state matte feeding pipe is movably arranged on the thermal state matte inlet; the thermal state matte feeding pipe is obliquely arranged, a thermal state matte inlet is connected with the lower end of the thermal state matte feeding pipe, and the thermal state matte enters the bottom blowing converter from the thermal state matte feeding pipe; a flue is movably arranged on the flue gas outlet; a cold material feeding hole is formed in the side wall of the flue; a plurality of cold material feeding holes are formed; a cold material feeding passage is arranged on the cold material feeding hole; the cold material feeding channel is obliquely arranged; the lower end of the cold material feeding channel is connected with the cold material feeding hole.)

1. A high-grade matte converting rapid mass and heat transfer system is characterized by comprising a bottom blowing converter (1), wherein a thermal matte inlet (2), a flue gas outlet (3) and a bottom blowing gas supply nozzle (4) are arranged on the bottom blowing converter (1);

the hot matte inlet (2) is arranged on the side wall of one end of the bottom blowing converter (1); the flue gas outlet (3) is arranged at the top of the bottom blowing converter (1); the bottom blowing gas supply nozzles (4) are arranged at the bottom of the bottom blowing converter (1);

a thermal state matte feeding pipe (5) is movably arranged on the thermal state matte inlet (2); the hot copper matte feeding pipe (5) is obliquely arranged, the hot copper matte inlet (2) is connected with the lower end of the hot copper matte feeding pipe (5), and the hot copper matte enters the bottom blowing converter (1) from the hot copper matte feeding pipe (5);

a flue (6) is movably arranged on the flue gas outlet (3); a cold material feeding hole (7) is formed in the side wall of the flue (6); a plurality of cold material feeding holes (7) are arranged; a cold material feeding channel (8) is arranged on the cold material feeding hole (7); the cold material feeding channel (8) is obliquely arranged; the lower end of the cold material feeding channel (8) is connected with the cold material feeding port (7), and the materials enter the bottom blowing converter (1) through the flue (6) from the cold material feeding channel (8).

2. A high-grade matte converting rapid mass and heat transfer system according to claim 1, characterized in that a supporting platform (9) is arranged above the bottom blowing converter (1); a compartment (10) is arranged on the supporting platform (9); a heat dissipation flue (25) is communicated above the flue (6); the heat dissipation flue (25) is set to be of a curve structure; the heat dissipation flue (25) is arranged inside the compartment (10), and the outlet of the heat dissipation flue (25) is arranged outside the compartment (10); the top of the compartment (10) is provided with a cold material feed opening (11); a cold material blanking channel (12) is arranged at the bottom of the cold material blanking port (11); the bottom of the cold material blanking channel (12) is connected with the cold material feeding channel (8).

3. A high-grade matte converting fast mass and heat transfer system according to claim 2, characterized in that said cold charge blanking channel (12) comprises a first blanking screw (13), a second blanking screw (14) and a buffer bin (15); the top of the first blanking screw (13) is connected with the cold material blanking port (11), and the bottom of the first blanking screw is connected with the top of the buffer bin (15); the top of the second discharging spiral (14) is connected with the bottom of the buffer bin (15), and the bottom of the second discharging spiral (14) is connected with the cold material feeding channel (8).

4. A high-grade matte converting rapid mass and heat transfer system according to claim 2, characterized in that the cold charge feed channel (8) is arranged in a telescopic sleeve structure; an insulating layer (16) is arranged on the outer wall of the compartment (10); the inner wall of the compartment (10) is provided with a temperature sensor (17) and a pressure sensor (18).

5. A high grade matte converting rapid mass and heat transfer system according to claim 2, characterized in that the hot matte feeding pipe (5) comprises a first sleeve (19) and a second sleeve (20); the first sleeve (19) is sleeved inside the second sleeve (20); a buffer interlayer (21) is arranged between the first sleeve (19) and the second sleeve (20).

6. A high-grade matte converting rapid mass and heat transfer system according to claim 5, characterized in that said first sleeve (19) is provided as a high temperature resistant nano ceramic material; the second sleeve (20) is made of high-temperature-resistant stainless steel.

7. The high-grade matte converting rapid mass and heat transfer system according to claim 2, wherein the bottom blowing air supply nozzle (4) is provided with a first air supply hole (22), a second air supply hole (23) and a third air supply hole (24); the first air supply hole (22) is arranged in the center of the cross section of the bottom blowing air supply nozzle (4); a plurality of second air supply holes (23) are uniformly arranged around the first air supply holes (22); the third air supply holes (24) are uniformly arranged around the second air supply holes (23).

8. The high-grade matte converting rapid mass and heat transfer system according to claim 7, wherein the first gas supply hole (22) is communicated with natural gas or diesel oil or coal gas; the second air supply hole (23) is communicated with oxygen or oxygen-enriched air or air; the third gas supply hole (24) is communicated with air or nitrogen or inert gas.

9. The high-grade matte converting rapid mass and heat transfer system according to claim 8, wherein the first gas supply hole (22) is communicated with natural gas; the second gas supply hole (23) is communicated with oxygen; the third air supply hole (24) is communicated with air.

10. The method for rapid mass and heat transfer of high-grade matte converting according to claim 9, characterized by comprising the following steps:

flue gas heat recycling:

a curved heat dissipation flue (25) is arranged above the flue (6), the flue gas is subjected to heat exchange with the outside air through the heat dissipation flue (25), and a part of heat is transferred to the inside of the compartment (10); insulation (16) external to the compartment (10) ensures that heat remains inside the compartment (10); before feeding, the cold materials are preheated through the compartments to absorb heat, the cold materials enter the bottom blowing converter (1) after being heated to a certain temperature, the flue gas is subjected to heat loss and transmission, and the temperature of the flue gas exhausted from the heat dissipation flue (25) is reduced to a certain degree;

feeding materials:

the hot copper matte is in a liquid state during feeding and enters the bottom blowing converter (1) from a first sleeve (19) in the hot copper matte feeding pipe (5) under the action of gravity; a buffer interlayer (21) and the first sleeve (19) are arranged outside the second sleeve (20), so that the first sleeve (19) made of porcelain is protected while a certain heat preservation effect is achieved;

when cold materials are fed, firstly, the cold materials are stored in a buffer storage bin (15) through a cold material feed opening (11) and temporarily placed, the materials in the buffer storage bin (15) are preheated through high temperature in a compartment (10), after the materials are preheated to a certain temperature, the materials enter a flue (6) through a cold material feed channel (8) under the action of gravity and then fall into a bottom blowing converter (1), and in the process, the feeding speed is controlled by adjusting the rotating speeds of a first feeding screw (13) and a second feeding screw (14);

bottom blowing gas supply:

the first gas supply hole (22) is communicated with natural gas, diesel oil or coal gas, and the natural gas, the diesel oil or the coal gas is sprayed into the bottom blowing converter (1) through the first gas supply hole (22); the second air supply hole (23) is communicated with oxygen or oxygen-enriched air or air, and the oxygen or oxygen-enriched air or air is sprayed into the bottom blowing converter (1) through the second air supply hole (23); the third gas supply holes (24) are communicated with air, nitrogen or inert gas, and the air, the nitrogen or the inert gas is sprayed into the bottom blowing converter (1) through the third gas supply holes (24).

Technical Field

The invention belongs to the technical field of chemical equipment, and particularly relates to a high-grade matte converting rapid mass and heat transfer system and a method thereof.

Background

The nationwide copper concentrate tends to be low-coarse-hybrid gradually, and is particularly characterized in that the raw materials are complex in components, high-melting-point substances such as magnesium and aluminum are high in content, and the copper concentrate is difficult to process due to the low content of effective components such as copper, iron and sulfur in the raw materials. The bottom blowing furnace needs to consume higher energy consumption in the process of treating complex copper concentrate, the desulfurization rate of the bottom blowing furnace is high, the sulfur content in the bottom blowing furnace is low, and the grade of the produced matte is gradually increased. After the grade of the copper matte is increased, the amount of the copper matte produced by the bottom blowing furnace is reduced. 100-110 tons of hot copper matte are required for blowing in the converter once, and the production of 100-110 tons of copper matte in the bottom blowing furnace is required for more than 4-5 hours. Because the bottom blowing furnace adopts the separation technology in the furnace, the amount of copper matte required by one-time blowing of the converter cannot be stored in the furnace, about 25 tons of 1 pack of hot copper matte needs to be discharged in 1.5-2 hours, the hot copper matte is discharged discontinuously, and the discharged hot copper matte is transferred by a ladle and poured into the converter for heat preservation and waits for the bottom blowing furnace to produce more copper matte until the converter blowing condition is met. In the process of waiting for, the heat of hot matte can lose gradually, the converter begins the converting after waiting for longer time, know from matte converting principle, the required heat of converter converting reaction mainly derives from the oxidation of iron and releases heat, matte grade is when 70% -80%, iron content is at 4.5-1.6%, contrast low grade matte converting, the reduction of iron content, make the heat of reaction significantly reduce, hot matte calorific loss and converting release heat less lead to converting process melt temperature lower, influence converting process impurity element's deviating from. In the blowing process, the converter is required to rotate, and the cold charge and the quartz sand are added into the converterThe rotation process has a large amount of SO₂The flue gas overflows; in addition, the temperature of the discharged flue gas is very high and can reach 1000 ℃, the flue gas has much energy, and the traditional method is to cool the flue gas by additionally arranging a water cooling cover on a flue gas pipeline.

The following problems exist in the copper matte converting process at present:

1) when the converter is used for feeding production, the feeding is restricted by the working procedure of a smelting bottom blowing furnace, the waiting time is long, the feeding time of the first two bags of materials is too long, about 2.5 hours, the temperature is obviously low, and the heat is insufficient.

2) Along with the rise of the grade of matte, the blowing time of copper per ton is shortened, the impurity removal capacity of the converter is reduced, the blowing time of copper per ton is 4-5min at the grade of 60% -65%, the blowing time of copper per ton is 1.8-2.6min at the grade of 70% -77%, and the reduction of the blowing time means that the oxidation reaction time of impurity elements is shortened, so that the impurity removal capacity of the converter is low, the impurity elements in crude copper are high, and the grade of the crude copper cannot reach 98.5%.

3) The melt temperature is low, the air pressure of the converter air hole rises quickly, the air hole needs to be poked frequently by manpower, and the labor intensity of the worker is increased.

4) The melt temperature in the blowing process is too low, so that the condition of converter blowing is easy to occur, and the production stop of equipment can be caused seriously.

5) In the process of adding hot matte, cold materials and quartz sand into a converter, a converter mouth needs to be turned to an accident position, and smoke in the converter can escape outwards in the rotating process, so that low-altitude pollution is caused.

6) The hot copper matte needs to be lifted by the steamed stuffed bun, and the low-altitude pollution is caused by the overflow of the hot copper matte smoke.

7) The water cooling system is easy to generate thermal fatigue damage under the action of alternating thermal stress, and a cooling water pipe is locally broken, so that the problem of large-area water leakage is caused, and serious explosion is caused.

Disclosure of Invention

The invention aims to avoid the defects of the prior art, and provides a high-grade matte converting rapid mass and heat transfer system and a method thereof, which can realize rapid mass and heat transfer and cyclic utilization of energy.

In order to achieve the purpose, the invention adopts the technical scheme that:

a high-grade matte converting rapid mass and heat transfer system comprises a bottom blowing converter, wherein a thermal matte inlet, a flue gas outlet and a bottom blowing gas supply nozzle are arranged on the bottom blowing converter;

the hot matte inlet is arranged on the side wall of one end of the bottom blowing converter; the flue gas outlet is arranged at the top of the bottom blowing converter; the bottom blowing gas supply nozzles are arranged at the bottom of the bottom blowing converter respectively;

a thermal state matte feeding pipe is movably arranged on the thermal state matte inlet; the thermal state matte feeding pipe is obliquely arranged, a thermal state matte inlet is connected with the lower end of the thermal state matte feeding pipe, and the thermal state matte enters the bottom blowing converter from the thermal state matte feeding pipe;

a flue is movably arranged on the flue gas outlet; a cold material feeding hole is formed in the side wall of the flue; a plurality of cold material feeding holes are formed; a cold material feeding passage is arranged on the cold material feeding hole; the cold material feeding channel is obliquely arranged; the lower end of the cold material feeding channel is connected with the cold material feeding port, and the materials enter the bottom blowing converter through the flue from the cold material feeding channel.

Further, a support table is arranged above the bottom blowing converter; a compartment is arranged on the supporting platform; a heat dissipation flue is communicated above the flue; the heat dissipation flue is set to be of a curve structure; the heat dissipation flue is arranged inside the compartment, and an outlet of the heat dissipation flue is arranged outside the compartment; the top of the compartment is provided with a cold material feed opening; a cold material discharging channel is arranged at the bottom of the cold material discharging port; the bottom of the cold material discharging channel is connected with the cold material feeding channel.

Furthermore, the cold material discharging channel comprises a first discharging screw, a second discharging screw and a buffer bin; the top of the first feeding spiral is connected with a cold material feeding opening, and the bottom of the first feeding spiral is connected with the top of the cache bin; the top of the second discharging spiral is connected with the bottom of the buffer bin, and the bottom of the second discharging spiral is connected with the cold material feeding channel.

Further, the cold material feeding channel is arranged to be of a telescopic sleeve structure.

Further, an insulating layer is arranged on the outer wall of the compartment; and a temperature sensor and a pressure sensor are arranged on the inner wall of the compartment.

Further, the hot copper matte feeding pipe comprises a first sleeve and a second sleeve; the first sleeve is sleeved inside the second sleeve; a buffer interlayer is arranged between the first sleeve and the second sleeve.

Further, the first sleeve is made of high-temperature-resistant nano ceramic materials; the second sleeve is made of high-temperature-resistant stainless steel.

Further, a first air supply hole, a second air supply hole and a third air supply hole are formed in the bottom blowing air supply nozzle; the first air supply hole is arranged in the center of the cross section of the bottom blowing air supply nozzle; the second air supply holes are uniformly arranged around the first air supply holes in a surrounding manner; the third air supply hole is provided with a plurality of air supply holes which are uniformly arranged around the second air supply hole in a surrounding mode.

Further, the first gas supply hole is communicated with natural gas, diesel oil or coal gas; the second air supply hole is communicated with oxygen or oxygen-enriched air or air; and the third gas supply hole is communicated with air, nitrogen or inert gas.

Further, the first gas supply hole is communicated with natural gas; the second air supply hole is communicated with oxygen; the third air supply hole is communicated with air.

The method for quickly transferring mass and heat in blowing of the high-grade matte comprises the following steps:

flue gas heat recycling:

a curved heat dissipation flue is arranged above the flue, the flue gas exchanges heat with the outside air through the heat dissipation flue, and a part of heat is transferred to the inside of the compartment; insulation on the exterior of the compartment ensures that heat remains inside the compartment; before feeding, the cold materials are preheated through the compartment to absorb heat, the cold materials enter the bottom blowing converter after being heated to a certain temperature, the flue gas is subjected to heat dissipation and transfer, and the temperature of the flue gas exhausted from the heat dissipation flue is reduced to a certain degree;

feeding materials:

the hot copper matte is in a liquid state during feeding and enters a bottom blowing converter from a first sleeve in a hot copper matte feeding pipe under the action of gravity; the buffer interlayer and the first sleeve are arranged outside the second sleeve, so that the first sleeve made of porcelain is protected while a certain heat preservation effect is achieved;

when cold materials are fed, firstly, the materials at normal temperature are stored in a cache bin through a cold material feed opening and temporarily placed, the materials in the cache bin are preheated through high temperature in a compartment, the materials enter a flue through a cold material feed channel under the action of gravity after being preheated to a certain temperature, and then the materials fall into a bottom blowing converter, and in the process, the feeding speed is controlled by adjusting the rotating speeds of a first feeding screw and a second feeding screw;

bottom blowing gas supply:

the first gas supply hole is communicated with natural gas or diesel oil or coal gas, and the natural gas or diesel oil or coal gas is sprayed into the bottom-blowing converter through the first gas supply hole; the second air supply hole is communicated with oxygen or oxygen-enriched air or air, and the oxygen or oxygen-enriched air or air is sprayed into the bottom blowing converter through the second air supply hole; and the third gas supply hole is communicated with air or nitrogen or inert gas, and the air or nitrogen or inert gas is sprayed into the bottom blowing converter through the third gas supply hole.

Compared with the prior art, the invention has at least the following beneficial effects:

1) the hot copper matte is directly discharged into the converter through the obliquely arranged hot copper matte feeding pipe, so that the hoisting process of the steamed stuffed bun is reduced, and the environmental protection risk and the safety risk are reduced;

2) the cold material feeding port is combined with the flue, so that the structure of the furnace body is simplified; the structure of a cold material feeding channel, a cold material discharging channel and the like is arranged, so that the discharging is accurately regulated and controlled, the furnace body does not need to be rotated to an accident position, the labor intensity is reduced, and the problem of low-altitude pollution when the furnace body rotates is solved;

3) by arranging the structure with three layers of air holes and introducing mixed gas of different types, the rapid converting of 65-80% matte grade can be realized, the impurity removal efficiency is higher, and the conditions that the quality of a blast furnace and the crude copper does not reach the standard can not occur;

4) through the structure that sets up heat dissipation flue and compartment, preheat the cold burden, realized energy cyclic utilization, make the cold burden react rapidly in the bottom blowing converter simultaneously for converting speed.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic diagram of the cold charge feed channel configuration of the present invention;

FIG. 3 is a schematic cross-sectional view of the bottom blowing gas supply nozzle of the present invention;

in the figure: a bottom blowing converter 1; a hot matte inlet 2; a flue gas outlet 3; a bottom blowing air supply nozzle 4; a hot matte feeding pipe 5; a flue 6; a cold charge inlet 7; a cold charge feed channel 8; a support table 9; a compartment 10; a cold charge feed opening 11; a cold burden blanking passage 12; a first blanking screw 13; a second feed screw 14; a cache storage 15; an insulating layer 16; a temperature sensor 17; a pressure sensor 18; a first sleeve 19; a second sleeve 20; a buffer interlayer 21; a first air supply hole 22; a second air supply hole 23; a third air supply hole 24; a heat dissipation flue 25.

Detailed Description

As shown in fig. 1-3: