阅读说明：本技术 一种弹罐式砷还原系统及砷还原工艺 (Takeout-type arsenic reduction system and arsenic reduction process ) 是由 南君芳 刘积社 张恩华 张叶新 申占斌 伍革卫 杨宏伟 杜武钊 王青丽 吕超飞 于 2021-11-02 设计创作，主要内容包括：本发明涉及一种弹罐式砷还原系统及砷还原工艺。该弹罐式砷还原系统,包括卧式炉、2个弹罐、第一导向机构、第二导向机构、第三导向机构、轨道、第一起升机构、第二起升机构、加料机构,当卧式炉内装入弹罐进行还原熔炼时,可将另一弹罐的还原段吊入可翻转段,进行加料；前一弹罐熔炼结束后,可输送至第二导向机构上,并即时将另一加料完毕的弹罐输送至卧式炉内,将另1个结晶段吊运至第二导向机构上,再通过第二导向机构调整该结晶段的位置,使得结晶段与还原段对接、固定后,即可进行后一弹罐物料的熔炼,如此反复,可始终保持卧式炉处于工作状态,实现不停炉、连续生产,有助于提高生产效率、节约能耗。(The invention relates to a bomb-type arsenic reduction system and an arsenic reduction process. The bomb-tank type arsenic reduction system comprises a horizontal furnace, 2 bomb tanks, a first guide mechanism, a second guide mechanism, a third guide mechanism, a track, a first lifting mechanism, a second lifting mechanism and a charging mechanism, wherein when the bomb tanks are loaded in the horizontal furnace for reduction smelting, a reduction section of the other bomb tank can be hung into a turnover section for charging; after the previous bomb pot is smelted, the previous bomb pot can be conveyed to the second guide mechanism, another bomb pot after charging is conveyed to the horizontal furnace in time, another 1 crystallization section is hoisted to the second guide mechanism, the position of the crystallization section is adjusted by the second guide mechanism, the crystallization section is butted with the reduction section and fixed, and then smelting of the material of the next bomb pot can be carried out.)

1. A bomb-type arsenic reduction system is characterized by comprising

A horizontal furnace (A1) which is provided with a furnace chamber extending along the horizontal direction, one end of the horizontal furnace (A1) is provided with an inlet (A3) communicated with the furnace chamber, the other end of the horizontal furnace (A1) is provided with an outlet (A2) communicated with the furnace chamber, and a plurality of heating elements (A5) are arranged in the furnace chamber;

2 bomb tanks, which are provided with a reduction section (B1) and a crystallization section (F3) which are communicated in sequence; when the device works, the reducing section (B1) of 1 bomb pot is arranged in the furnace cavity, one end of the reducing section (B1) extends to the outer side of the inlet (A3) or the inlet (A3), and the end of the reducing section is sealed; the other end of the reduction section (B1) extends to the outside of the outlet (A2), wherein the feed end of the crystallization section (F3) of 1 bomb is detachably connected with the end of the reduction section (B1) extending to the outside of the outlet (A2);

the first guide mechanism (A4) is arranged at the bottom of the furnace chamber, the reducing section (B1) is movably arranged on the first guide mechanism (A4), and the reducing section (B1) can move along the length direction of the furnace chamber under the driving of the first guide mechanism (A4);

a second guide mechanism (F5) disposed outside the outlet (A2), the crystallization section (F3) being movably disposed on the second guide mechanism (F5), the crystallization section (F3) being movable in a longitudinal direction of the furnace chamber by the second guide mechanism (F5);

a third guide mechanism (D2) which is arranged outside the inlet (A3) and is used for arranging the reduction section (B1) and inputting the reduction section (B1) into the furnace cavity; the height position of the third guide mechanism (D2) and the height position of the second guide mechanism (F5) are the same as the height position of the first guide mechanism (A4);

a rail (G1) which is arranged above the horizontal furnace (A1) and extends along the length direction of the furnace chamber;

a first lifting mechanism (G2) movably arranged on the track (G1);

the second hoisting mechanism (G3) is movably arranged on the track (G1), and the first hoisting mechanism (G2) is positioned on one side of the second hoisting mechanism (G3) close to the inlet (A3) of the horizontal furnace (A1); and

a feeding mechanism for feeding the raw material to the reduction section (B1);

the third guide mechanism (D2) comprises a body, a first driving motor (AF7) and a turnable section (D3), one end, far away from the horizontal furnace (A1), of the turnable section (D3) is hinged to the body through a rotating shaft (AF6), a vertical baffle (AF13) is arranged at the end of the turnable section (D3), the rotating shaft (AF6) is parallel to the horizontal plane and perpendicular to the length direction of the furnace chamber, and the first driving motor (AF7) is in transmission connection with the rotating shaft (AF 6); and a detachable clamp (AF5) is arranged on the turnable section (D3).

2. The canister-type arsenic reduction system according to claim 1, wherein the charging mechanism comprises an auger mechanism (AF2), one end of the auger mechanism (AF2) is provided with a hopper (AF1), and the other end of the auger mechanism (AF2) is provided with a blanking outlet (AF 3); when feeding, the reduction section (B1) to be fed stands up under the action of the reversible section (D3), so that the top end of the reduction section (B1) corresponds to the position of the feeding outlet (AF 3).

3. The bomb-type arsenic reduction system of claim 1, wherein the reversible section (D3) comprises a reversible support (AF8) extending along the length direction of the furnace chamber, a plurality of rollers (AF9) are arranged on the reversible support (AF8) and are parallel to each other and are sequentially distributed along the length direction of the reversible support (AF8), a second driving motor (AF12) is arranged on the reversible support (AF8), and the second driving motor (AF12) is in transmission connection with each roller (AF 9).

4. The bomb-type arsenic reduction system according to any one of claims 1 to 3, wherein a sleeve (B3) is arranged in the reduction section (B1), one end of the sleeve (B3) is positioned in the reduction section (B1) and sealed, and the other end of the sleeve (B3) is flush with and open to the end of the reduction section (B1) far away from the crystallization section (F3); a third guide mechanism (D2) is arranged on the outer side of the inlet (A3), a heating trolley (C2) is movably arranged on the third guide mechanism (D2), the heating trolley (C2) can move along the length direction of the furnace chamber under the driving of the third guide mechanism (D2), and a blocking cover (B2) and a heating pipe (C1) extending along the length direction of the sleeve pipe (B3) are arranged on the side wall, close to the horizontal furnace (A1), of the heating trolley (C2); when the heat pipe sealing device works, the heating pipe (C1) extends into the sleeve (B3), and the sealing cover (B2) is in butt joint with the inlet (A3) to realize sealing;

the vertical baffle (AF13) is detachably fixed on the turnable section (D3).

5. The retort-type arsenic reduction system according to any one of claims 1 to 3, wherein the plurality of heating elements (A5) are divided into 2 groups, 1 group being located at the top of the furnace chamber and the other 1 group being located at the bottom of the furnace chamber; the number of the heating elements (A5) in each 1 group is multiple, and the heating elements are distributed along the length direction of the furnace cavity in sequence.

6. The bomb-type arsenic reduction system according to any one of claims 1 to 3, wherein the cross-sectional area of the end of the reduction section (B1) near the crystallization section (F3) is gradually increased from outside to inside, and the cross-sectional area of the end of the crystallization section (F3) near the reduction section (B1) is gradually decreased in the direction of the reduction section (B1).

7. The shooting pot type arsenic reduction system as claimed in any one of claims 1 to 3, wherein the first guide mechanism (A4) and the second guide mechanism (F5) each comprise a guide support extending along the length of the furnace chamber, the guide support is provided with a plurality of rollers parallel to each other and sequentially distributed along the length of the guide support, and the guide support is provided with a driving motor drivingly connected to each roller on the guide support.

8. The can-bomb arsenic reduction system of claim 7, wherein the reduction section (B1) is cylindrical and the rollers have constrictions with increasing cross-sectional area from its vertical to its ends.

9. An arsenic reduction process, carried out using the bomb-tank arsenic reduction system of any one of claims 1 to 8, comprising the steps of:

s1, conveying 1 reducing section (B1) to the turnable section (D3) through a guide mechanism, and enabling one end, far away from the horizontal furnace (A1), of the reducing section (B1) to abut against a vertical baffle (AF 13); fixing the reduction section (B1) on the reversible section (D3) by using a clamp (AF5), starting a first driving motor (AF7), enabling the reduction section (B1) to be turned over to a feeding station along with the reversible section (D3), and feeding by using a feeding mechanism; after the feeding is finished, controlling the reversible section (D3) to turn over to a horizontal state towards the direction of the horizontal furnace (A1), and removing the clamp (AF 5);

s2, conveying the charged reduction section (B1) into a furnace cavity through a first guide mechanism (A4) and a third guide mechanism (D2), conveying 1 crystallization section (F3) to the direction of a horizontal furnace (A1) through a second guide mechanism (F5), enabling the feeding end of the crystallization section (F3) to be in butt joint with the reduction section (B1), and then fixing;

s3, controlling the temperature in the horizontal furnace (A1) to 800-;

meanwhile, another 1 reduction section (B1) is hoisted to the turnable section (D3) through the first hoisting mechanism (G2), and the process is repeated

S1, feeding;

s4, conveying the cooled reduction section (B1) to a second guide mechanism (F5) through a first guide mechanism (A4) and a second guide mechanism (F5), cooling to below 60 ℃, splitting a crystallization section (F3) and a reduction section (B1), taking out a metal arsenic product in the crystallization section (F3), and cleaning residues in the reduction section (B1);

meanwhile, another 1 charged reduction section (B1) is conveyed into the furnace cavity through a first guide mechanism (A4) and a third guide mechanism (D2); another 1 crystallization section (F3) is hoisted to a second guide mechanism (F5) through a second hoisting mechanism (G3), so that the crystallization section (F3) is positioned between a horizontal furnace (A1) and a reduction section (B1) on the second guide mechanism (F5), and then the crystallization section (F3) is conveyed to the direction of the horizontal furnace (A1) through the second guide mechanism (F5), so that the feeding end of the crystallization section (F3) is butted with the reduction section (B1) and then is fixed;

s5, repeating S3 and S4 to realize continuous production.

Technical Field

The invention relates to a bomb-type arsenic reduction system and an arsenic reduction process.

Background

Arsenic is a highly toxic substance, and its compound arsenic trioxide is commonly called arsenic trioxide. From mining and metallurgy plants such as gold, white silver, lead, zinc, copper, antimony and the like. In recent years, due to the vigorous development of the mining and metallurgy industry, more and more arsenic-containing waste materials cannot be effectively collected and utilized, and the hidden danger of pollution is serious.

The arsenic reduction furnace is generally used for reduction smelting of arsenic-containing materials such as arsenic trioxide to obtain arsenic, and separation and purification of the arsenic are realized. The existing arsenic reduction furnace is generally of a vertical structure, is inconvenient to load and unload materials, has small capacity, is difficult to realize large-scale production, and has to improve the whole production benefit. In addition, when the existing arsenic reduction furnace is used for high-temperature smelting, the formed arsenic-containing flue gas moves upwards, and meanwhile, impurities in the raw materials are easy to move upwards along with the flue gas and are finally mixed into an arsenic crystal product, so that the purity of the arsenic crystal product is not high.

CN202022075479.9 discloses a smelting furnace and an arsenic reduction furnace, wherein the arsenic reduction furnace comprises a hollow furnace body, and a smelting tank which is in clearance fit with the furnace body is arranged in the furnace body; a plurality of vertically arranged first jacks are arranged in the side wall of the furnace body, and first heating rods are respectively arranged in the first jacks; the smelting tank comprises a tank body and a columnar inner shell arranged in the tank body, the inner shell is opened downwards and communicated with the bottom surface of the tank body, and the tank body and the inner shell jointly enclose a smelting space; a plurality of second heating rods are arranged in the inner shell. Although the arsenic reduction furnace has higher thermal efficiency and improves the material processing amount of a single furnace, the arsenic reduction furnace has a vertical structure, the material processing amount of the single furnace is limited, and the problem of low heating efficiency is still faced if the arsenic reduction furnace is further enlarged; in addition, after a furnace material is processed, the furnace needs to be shut down, cooled, unloaded, charged and heated again, the next furnace material is processed, the production efficiency is still to be improved, and repeated cooling and heating are not beneficial to saving energy consumption.

Disclosure of Invention

In view of the shortcomings of the prior art, it is an object of the present invention to provide a bomb-type arsenic reduction system to improve the treatment efficiency; another object of the present invention is to provide an arsenic reduction process.

In order to solve the technical problems, the technical scheme of the invention is as follows:

a bomb-tank arsenic reduction system comprises

The horizontal furnace is provided with a furnace chamber extending along the horizontal direction, one end of the horizontal furnace is provided with an inlet communicated with the furnace chamber, the other end of the horizontal furnace is provided with an outlet communicated with the furnace chamber, and a plurality of heating elements are arranged in the furnace chamber;

2 bomb tanks, wherein the bomb tanks are provided with a reduction section and a crystallization section which are sequentially communicated; when the furnace works, the reduction section of 1 bomb pot is arranged in the furnace cavity, one end of the reduction section extends to the inlet or the outer side of the inlet, the end of the reduction section is sealed, the other end of the reduction section extends to the outer side of the outlet, and the feeding end of the crystallization section of 1 bomb pot is detachably connected with one end of the reduction section extending to the outer side of the outlet;

the first guide mechanism is arranged at the bottom of the furnace chamber, the reduction section is movably arranged on the first guide mechanism, and the reduction section can move along the length direction of the furnace chamber under the driving of the first guide mechanism;

the second guide mechanism is arranged at the outer side of the outlet, the crystallization section is movably arranged on the second guide mechanism, and the crystallization section can move along the length direction of the furnace chamber under the driving of the second guide mechanism;

the third guide mechanism is arranged on the outer side of the inlet and used for arranging the reduction section and inputting the reduction section into the furnace cavity; the height position of the third guide mechanism and the height position of the second guide mechanism are the same as the height position of the first guide mechanism;

a rail disposed above the horizontal furnace and extending along a length direction of the furnace chamber;

the first lifting mechanism is movably arranged on the track;

the second lifting mechanism is movably arranged on the track, and the first lifting mechanism is positioned on one side of the second lifting mechanism, which is close to the inlet of the horizontal furnace; the feeding mechanism is used for feeding raw materials into the reduction section;

the third guide mechanism comprises a body, a first driving motor and a turnable section, one end of the turnable section, which is far away from the horizontal furnace, is hinged with the body through a rotating shaft, a vertical baffle is arranged at the end of the turnable section, the rotating shaft is parallel to the horizontal plane and is vertical to the length direction of the furnace chamber, and the first driving motor is in transmission connection with the rotating shaft; and a detachable hoop is arranged on the turnable section.

Thus, when the bomb pot is loaded in the horizontal furnace for reduction smelting, the reduction section of the other bomb pot can be hung into the turnover section for charging; after the smelting of the previous bomb is finished, the previous bomb can be conveyed to the second guide mechanism, another bomb can after the feeding is finished is conveyed to the horizontal furnace, another 1 crystallization section is hoisted to the second guide mechanism between the previous bomb and the horizontal furnace, and the position of the crystallization section is adjusted by the second guide mechanism, so that the next bomb can be smelted after the crystallization section is butted and fixed with the reduction section, and therefore, the horizontal furnace can be always kept in a working state, and the continuous production without stopping the furnace is realized.

Furthermore, the feeding mechanism comprises a spiral feeding mechanism, one end of the spiral feeding mechanism is provided with a hopper, and the other end of the spiral feeding mechanism is provided with a discharging outlet; during feeding, the reduction section to be fed stands up under the action of the turnover section, so that the top end of the reduction section corresponds to the position of the feeding outlet. Thus, the charging can be conveniently carried out.

Furthermore, the turnable section comprises a turnable support extending along the length direction of the furnace chamber, the turnable support is provided with a plurality of rollers which are parallel to each other and are sequentially distributed along the length direction of the turnable support, the support is provided with a second driving motor, and the second driving motor is in transmission connection with the rollers.

Furthermore, a sleeve is arranged in the reduction section, one end of the sleeve is positioned in the reduction section and is sealed, and the other end of the sleeve is flush with one end of the reduction section far away from the crystallization section and is opened; a third guide mechanism is arranged on the outer side of the inlet, a heating trolley is movably arranged on the third guide mechanism, the heating trolley can move along the length direction of the furnace chamber under the driving of the third guide mechanism, and a blocking cover and a heating tube extending along the length direction of the sleeve are arranged on the side wall, close to the horizontal furnace, of the heating trolley; when the device works, the heating tube extends into the sleeve, and the blocking cover is butted with the inlet to realize blocking;

the vertical baffle is detachably fixed on the turnable section. Thus, the inside and the outside of the reduction section are heated, which is beneficial to further improving the heating and reduction effects; the vertical baffle is detachable, when a space for arranging the reduction section is required to be reserved at the inlet side of the horizontal furnace, the vertical baffle can be detached, and the heating trolley is conveyed to one side of the installation position of the vertical baffle, which is far away from the direction of the horizontal furnace; when the feeding operation is needed, the vertical baffle is installed.

Furthermore, the plurality of heating elements are divided into 2 groups, wherein 1 group is positioned at the top of the furnace chamber, and the other 1 group is positioned at the bottom of the furnace chamber; the number of each 1 group of heating elements is a plurality, and the heating elements are distributed along the length direction of the furnace chamber in sequence.

Furthermore, the cross-sectional area of one end of the reduction section, which is close to the crystallization section, is gradually increased from outside to inside, and the cross-sectional area of one end of the crystallization section, which is close to the reduction section, is gradually decreased along the direction of the reduction section. Therefore, the materials in the reduction section can be prevented from entering the crystallization section, and the cleanliness of the metal arsenic product in the crystallization section is ensured.

Furthermore, the first guide mechanism and the second guide mechanism both comprise guide supports extending along the length direction of the furnace chamber, a plurality of parallel rolling shafts are arranged on the guide supports and are sequentially distributed along the length direction of the guide supports, and the guide supports are provided with driving motors which are in transmission connection with the rolling shafts on the guide supports.

Further, the reduction section is cylindrical, the rolling shaft is provided with a contraction section, and the cross sectional area of the contraction section is gradually increased from the vertical plane to the two ends of the contraction section. The contraction section can play a positioning role and prevent the reduction section from shifting along the length direction of the roller. Preferably, the constriction is located in the middle of the roller.

An arsenic reduction process carried out using the bomb-type arsenic reduction system as described above, comprising the steps of:

s1, conveying 1 reducing section to the turnover section through the guide mechanism, and enabling one end, far away from the horizontal furnace, of the reducing section to be abutted against the vertical baffle; fixing the reduction section on the turnover section by using a hoop, starting a first driving motor to enable the reduction section to be turned over to a feeding station along with the turnover section, and feeding by using a feeding mechanism; after the feeding is finished, controlling the turnover section to turn over to a horizontal state towards the direction of the horizontal furnace, and removing the clamp;

s2, conveying the charged reduction section into a furnace chamber through a first guide mechanism and a third guide mechanism, conveying 1 crystallization section to the direction of a horizontal furnace through a second guide mechanism, enabling the feeding end of the crystallization section to be in butt joint with the reduction section, and then fixing;

s3, controlling the temperature in the horizontal furnace to 800-;

during the process, the other 1 reduction section is lifted to the reversible section through the first lifting mechanism, and S1 is repeated to feed materials;

s4, conveying the cooled reduction section to a second guide mechanism through a first guide mechanism and the second guide mechanism, cooling to below 60 ℃, splitting the crystallization section and the reduction section, taking out a metal arsenic product in the crystallization section, and cleaning residues in the reduction section;

during the process, the other 1 reduction section after charging is conveyed into the furnace chamber through the first guide mechanism and the third guide mechanism; another 1 crystallization section is hoisted to a second guide mechanism through a second hoisting mechanism, so that the crystallization section is positioned between the horizontal furnace and a reduction section on the second guide mechanism, and then the crystallization section is conveyed to the direction of the horizontal furnace through the second guide mechanism, so that the feeding end of the crystallization section is butted with the reduction section and then fixed;

s5, repeating S3 and S4 to realize continuous production.

Optionally, the feedstock is a mixture of an arsenic-containing material and C. The arsenic-containing raw material comprises one or more of arsenic-containing solid waste, arsenic trioxide, arsenic pentoxide, arsenate and arsenite. The C comprises one or more of charcoal, coke powder and graphite powder.

Optionally, the arsenic-containing solid waste comprises one or more of arsenic-containing metal waste and arsenic-containing smoke dust. Optionally, the arsenic-containing solid waste is pretreated by the following specific method: grinding the arsenic-containing solid waste into slurry, adding hydrogen peroxide or an alkaline medicament, stirring, and carrying out solid-liquid separation to obtain slag and filtrate; adding quicklime into the filtrate, stirring for reaction, and performing solid-liquid separation to obtain calcium arsenate and residual liquid. The obtained slag charge can be sent into a related smelting system to recover valuable metals, the obtained calcium arsenate can be directly used as a raw material for reduction smelting, and the obtained residual liquid can be returned to the step of grinding the pulp for recycling.

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

1) the bomb-tank type arsenic reduction system is high in production efficiency, the horizontal furnace basically does not need to be stopped for waiting, and the production efficiency is improved and energy consumption is saved.

2) The bomb-type arsenic reduction system has high degree of mechanization, and saves people, labor, energy and emission compared with the traditional arsenic smelting tank process.

3) The bomb-type arsenic reduction system disclosed by the invention is reasonable in structure, low in leakage risk of flue gas and smoke dust and small in environmental pollution hidden danger, and is beneficial to solving the problems of serious pollution hidden danger of the existing arsenic smelting technology and arsenic color change in the prior art.

4) The bomb-type arsenic reduction system has large treatment capacity and saves energy. The conventional arsenic smelting pot process can only charge about 800kg of raw material at a time and cannot be operated continuously. The bomb-tank type arsenic reduction system has large bomb-tank loading capacity which is several times or even more than 10 times of that of the original arsenic smelting tank at one time, is favorable for improving the treatment capacity, and realizes energy conservation and consumption reduction.

5) The bomb-type arsenic reduction system has strong adaptability to raw materials. Generally, the traditional arsenic smelting equipment needs arsenic trioxide raw materials with the arsenic content of more than 98wt percent to smelt qualified metal arsenic products. In the smelting process of the bomb-type arsenic reduction system, arsenic-containing flue gas generated in the reduction section slowly moves towards the crystallization section, and impurities such as dust and the like in the reduction section are not easily brought into the crystallization section, so that the method is favorable for obtaining arsenic crystal products with higher purity.

6) The arsenic reduction process is simple and has strong practicability.

Drawings

Fig. 1 is a schematic structural view of a horizontal furnace according to a first embodiment of the present invention.

Fig. 2 is a schematic structural view of the invertible sections of the first embodiment of the present invention in a non-inverted state.

Fig. 3 is a schematic structural view of the invertable segment of the first embodiment of the present invention in an inverted state.

FIG. 4 is a schematic view of the reduction section of the bomb-type arsenic reduction system according to the first embodiment of the present invention before it enters the furnace.

FIG. 5 is a schematic view of the reduction section of the bomb-type arsenic reduction system according to the first embodiment of the present invention after being charged into the furnace.

FIG. 6 is a schematic view showing a state of tapping after 1 bomb smelting of the bomb-type arsenic reduction system according to the first embodiment of the present invention.

FIG. 7 is a schematic view showing a state after discharging 1 bomb after completion of smelting in the first embodiment of the bomb-type arsenic reduction system.

Detailed Description

The present invention will be described in detail with reference to examples. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. For convenience of description, the words "upper", "lower", "left" and "right" in the following description are used only to indicate the correspondence between the upper, lower, left and right directions of the drawings themselves, and do not limit the structure.

Referring to FIGS. 1 to 7, a bomb-type arsenic reduction system includes

The horizontal furnace A1 is provided with a furnace chamber extending along the horizontal direction, one end of the horizontal furnace A1 is provided with an inlet A3 communicated with the furnace chamber, the other end of the horizontal furnace A1 is provided with an outlet A2 communicated with the furnace chamber, and a plurality of heating elements A5 are arranged in the furnace chamber;

2 bomb tanks, wherein the bomb tanks are provided with a reduction section B1 and a crystallization section F3 which are sequentially communicated; during operation, the reduction section B1 of 1 bomb is arranged in the furnace cavity, one end of the reduction section B1 extends to the outer side of the inlet A3 or the inlet A3, the end of the reduction section is sealed, the other end of the reduction section B1 extends to the outer side of the outlet A2, and the feeding end of the crystallization section F3 of 1 bomb is detachably connected with one end of the reduction section B1 extending to the outer side of the outlet A2;

the first guide mechanism A4 is arranged at the bottom of the furnace chamber, the reducing section B1 is movably arranged on the first guide mechanism A4, and the reducing section B1 can be driven by the first guide mechanism A4 to move along the length direction of the furnace chamber;

a second guiding mechanism F5 disposed outside the outlet A2, wherein the crystallizing section F3 is movably disposed on the second guiding mechanism F5, and the crystallizing section F3 can be driven by the second guiding mechanism F5 to move along the length direction of the furnace chamber;

the third guide mechanism D2 is arranged outside the inlet A3 and is used for arranging the reduction section B1 and inputting the reduction section B1 into the furnace cavity; the height position of the third guide mechanism D2 and the height position of the second guide mechanism F5 are the same as the height position of the first guide mechanism A4;

2 mutually parallel rails G1 arranged above the side of the horizontal furnace a1 and extending along the length direction of the furnace chamber;

the first hoisting mechanism G2 is used for hanging the reduction section B1 or the heating trolley C2, and the first hoisting mechanism G2 is movably arranged on the rail G1;

the second lifting mechanism G3 is used for hanging the crystallized section F3, and the second lifting mechanism G3 is movably arranged on the track G1 and is positioned at the left side of the first lifting mechanism; and

the feeding mechanism is used for feeding raw materials into the reduction section B1;

the third guide mechanism D2 comprises a body D1, a first driving motor AF7 and a turnable section D3, wherein one end, far away from the horizontal furnace A1, of the turnable section D3 is hinged to the body through a rotating shaft AF6, the end of the turnable section D3 is provided with a vertical baffle AF13, the rotating shaft AF6 is parallel to the horizontal plane and is vertical to the length direction of the furnace chamber, and the first driving motor AF7 is in transmission connection with the rotating shaft AF 6; the turnable section D3 is provided with a detachable hoop AF 5.

Optionally, the bomb-type arsenic reduction system further comprises 2 travelling cranes mounted on the track, and the first hoisting mechanism and the second hoisting mechanism are movably arranged on the 1 travelling crane respectively, so that the hoisting mechanisms can move along the length direction (transverse direction) of the track and can also move along the longitudinal direction (namely the length direction of the travelling cranes), maintenance of parts such as the crystallization section, the reduction section and the heating trolley C2 can be facilitated, and discharge of materials in the crystallization section and the reduction section can also be facilitated.

The feeding mechanism comprises a spiral feeding mechanism AF2 and a third driving motor AF4 in transmission connection with the spiral feeding mechanism AF2, one end of the spiral feeding mechanism AF2 is provided with a hopper AF1, and the other end of the spiral feeding mechanism AF2 is provided with a discharging outlet AF 3; when feeding, the reduction section B1 to be fed stands up under the action of the turnable section D3, so that the top end of the reduction section B1 corresponds to the position of the feeding outlet AF 3.

The turnable section D3 includes a turnable support AF8 extending along the length direction of the oven cavity, the turnable support AF8 is provided with a plurality of rollers AF9 parallel to each other and sequentially distributed along the length direction of the turnable support AF8, the support AF8 is provided with a second driving motor AF12, and the second driving motor AF12 is in transmission connection with each roller AF 9. The end parts of the rollers AF9 are respectively provided with a chain wheel AF10, and the adjacent rollers AF9 are in transmission connection through a chain AF 11.

The main purpose of the horizontal furnace is heat supply and heat preservation. The raw material containing arsenic is loaded into a reduction section, and the reduction section is wholly pushed into a high-temperature furnace to heat and purify the metal arsenic product.

The appearance shape specification of the horizontal furnace is as follows: cuboid, specification: 8000mm long, 2000mm wide and 2200mm high, the inlet and outlet are circular with 1200mm diameter, and the reduction section filled with raw material is used for inlet and outlet. The furnace is of an integral steel frame structure. The periphery of the shell is made of transparent stainless steel plates, and the cover is attractive and elegant.

The periphery in the furnace chamber is respectively provided with a refractory brick wall body with the width of 300mm, and the length, the width and the height of the inner space in the furnace after building are 7400mm, 1400mm and 1700mm respectively.

The inner periphery of the furnace chamber is provided with 54 heating rods with total heating power 972KW, the temperature in the furnace can be raised to 1200 ℃, and temperature control instrument equipment facilities are arranged outside the furnace for 10 meters.

The bottom in the furnace chamber is provided with 16 rollers, the length of the roller is 2400mm, and the diameter of the roller is 120 mm. The shaft is hollow, so that ventilation and heat dissipation of the shaft are facilitated, and the strength of the shaft is kept without deformation in the operation process.

The two ends of the rolling shaft are provided with a bearing and a bearing seat: the installation method of the rolling shaft is inserted from the bottom of the furnace chamber, two ends of the shaft are exposed out of the wall, and bearing blocks at two ends are fixed on the support. The main function of the roller is to undertake effective continuous operation production of the reduction section entering and exiting the furnace.

The reduction zone has a total length of 8500mm and a diameter of 1000 mm.

A sleeve B3 is arranged in the reduction section B1, one end of the sleeve B3 is positioned in the reduction section B1 and sealed, and the other end of the sleeve B3 is flush with and opened at one end of the reduction section B1 far away from the crystallization section F3; a third guide mechanism D2 is arranged on the outer side of the inlet A3, a heating trolley C2 is movably arranged on the third guide mechanism D2, the heating trolley C2 can move along the length direction of the furnace chamber under the driving of the third guide mechanism D2, and a blocking cover B2 and a heating pipe C1 extending along the length direction of a sleeve B3 are arranged on the side wall of the heating trolley C2 close to the horizontal furnace A1; when the heat pipe plugging device works, the heating pipe C1 extends into the sleeve B3, and the plugging cover B2 is in butt joint with the inlet A3 to realize plugging; the length of sleeve B3 is 6000mm, and the diameter is 350mm, and the sleeve pipe purpose is that the smooth flexible effect of protection portable interior heating tube can. The length of the heating tube C1 is 6000mm, the diameter is 300mm, 2 groups of U-shaped heating rods are arranged in the heating tube C1, the total power is 72KW, the heating can be carried out to 900 ℃, and the heating tube C is used for internally heating and combusting the raw materials in the reduction section B1 to achieve the best effect.

The vertical baffle AF13 can be detachably fixed on the turnable section D3, optionally, the right end of the turnable section D3 is provided with a vertically arranged frame AF14, the side part of the frame AF14 is provided with a socket AF5, and the vertical baffle AF13 can be inserted into the frame through the socket so as to be fixed on the turnable section D3. The blocking cover B2 and the heating tube C1 are coaxial.

The plurality of heating elements A5 are divided into 4 groups, 1 group is positioned at the top of the furnace chamber, 1 group is positioned at the bottom of the furnace chamber, 2 groups is positioned at the side part of the furnace chamber, and 4 groups of heating elements surround a space for the reduction section B1 to pass through; the number of the heating elements A5 in each group is multiple, and the heating elements A5 are distributed along the length direction of the furnace cavity in sequence.

The cross sectional area of one end of the reduction section B1 close to the crystallization section F3 is gradually increased from outside to inside to form a first conical head F1; the cross-sectional area of the end of the crystallizing section F3 near the reducing section B1 is gradually reduced along the direction of the reducing section B1 to form a second taper F2. Thus, the reducing zone B1 was tapered at its end near the crystallizing zone F3, and the diameter of the end was 800 mm. The main purpose of the reduction section is to bear and refine the main raw materials (calcium arsenate, arsenic trioxide, charcoal and the like) of the metal arsenic. The advantages are large loading, uniform heating, flexible and convenient operation. The material requirement of the cartridge case is as follows: and (3) manufacturing a heat-resistant stainless steel plate with the thickness of 18 mm. The outer ends of the first conical head F1 and the second conical head F2 are respectively provided with a flange B4 so as to facilitate sealing and connection between the two. The diameters of the ends of the first cone head F1 and the second cone head F2 are both 800 mm. Optionally, the second guide mechanism is provided with a positioning push plate F4 capable of moving along the second guide mechanism, and the reduction section is fixed on the positioning push plate F4.

The crystallization section F3 has a third cone with a cross-sectional area which increases gradually towards the horizontal furnace, a diameter of 400mm at the left end, a diameter of 1200mm at the right end and a length of 2500mm, the right end being detachably connected to the second cone F2, in particular by means of bolts. When the arsenic crystal product in the crystallization section F3 needs to be taken out, the second conical head and the third conical head can be separated, then the corresponding conical heads are hoisted to a target position (such as in a material loading disc) by using a hoisting mechanism or other hoists, and the inclination of the conical heads is adjusted, for example, the conical heads are in an upright state, and then the arsenic crystal product can be poured out. During this period, the conical head can be knocked to allow the arsenic crystalline product to pour out more quickly and completely. Accordingly, similar operations can be performed for the reduction stage B1 to remove the slag in the reduction stage B1 after the reduction smelting.

Optionally, the inner wall of the crystallizing section F3 is provided with an inner lining layer made of stainless steel, so that the taking out of the metal arsenic crystallizing product can be facilitated.

The first guide mechanism A4 and the second guide mechanism F5 both comprise guide supports extending along the length direction of the furnace chamber, a plurality of rollers which are parallel to each other and distributed in sequence along the length direction of the guide supports are arranged on the guide supports, and driving motors are arranged on the guide supports and are in transmission connection with the rollers on the guide supports.

The reduction section B1 is cylindrical, and the roller has a contraction section, and the cross-sectional area of the contraction section gradually increases from the vertical plane to the two ends of the contraction section.

An arsenic reduction process carried out using the bomb-type arsenic reduction system as described above, comprising the steps of:

s1, mounting a vertical baffle AF13 on the turnable section D3, and conveying 1 reducing section B1 to the turnable section D3 through a guide mechanism, so that one end, far away from the horizontal furnace A1, of the reducing section B1 is abutted to the vertical baffle AF 13; fixing the reduction section B1 on the turnable section D3 by using a hoop AF5, starting a first driving motor AF7, enabling the reduction section B1 to be turned to a feeding station along with the turnable section D3, and feeding materials by using a feeding mechanism; after the feeding is finished, controlling the reversible section D3 to turn over to a horizontal state towards the direction of the horizontal furnace A1, and removing the clamp AF 5;

wherein the added material is mixed powder of calcium arsenate and coke;

s2, conveying the charged reduction section B1 to a furnace chamber through a first guide mechanism A4 and a third guide mechanism D2; conveying 1 crystallization section F3 to the direction of the horizontal furnace A1 through a second guide mechanism F5, enabling the feeding end of the crystallization section F3 to be in butt joint with the reduction section B1, and then fixing;

s3, conveying the charging trolley C2 to the direction of the horizontal furnace through a third guide mechanism, so that the heating tube C1 extends into the sleeve, and the blocking cover is in butt joint with the inlet to realize blocking; then controlling the temperature in the horizontal furnace A1 to 280 ℃, and preserving the heat for 4 hours to dry and dehydrate the raw materials; heating to 850 ℃, preserving heat for 5.5 hours, and cooling to below 400 ℃;

meanwhile, another 1 reduction section B1 is hoisted to the turnable section D3 through a first hoisting mechanism G2, and S1 is repeated to charge;

s4, conveying the cooled reduction section B1 to a second guide mechanism F5 through a first guide mechanism A4 and a second guide mechanism F5, cooling to below 60 ℃, splitting a crystallization section F3 and a reduction section B1, taking out a metal arsenic product in the crystallization section F3, and cleaning residues in the reduction section B1; the heating trolley C2 is moved rightwards through a third guide mechanism D2, so that the heating tube C1 is completely moved out of the horizontal furnace, the heating trolley C2 is hoisted and conveyed to the right side of the installation position of the vertical baffle AF13 through a first hoisting mechanism G2, and the vertical baffle AF13 is removed;

meanwhile, after the heating trolley C2 is lifted, the other 1 charged reduction section B1 is conveyed into the furnace chamber through a first guide mechanism A4 and a third guide mechanism D2; another 1 crystallization section F3 is hoisted to a second guide mechanism F5 through a second hoisting mechanism G3, so that the crystallization section F3 is positioned between a horizontal furnace A1 and a reduction section B1 on the second guide mechanism F5, and the crystallization section F3 is conveyed to the direction of a horizontal furnace A1 through a second guide mechanism F5, so that the feeding end of the crystallization section F3 is butted with a reduction section B1 and then is fixed;

s5, repeating S3 and S4 to realize continuous production.

The foregoing examples are set forth to illustrate the present invention more clearly and are not to be construed as limiting the scope of the invention, which is defined in the appended claims to which the invention pertains, as modified in all equivalent forms, by those skilled in the art after reading the present invention.