Circulating fluidization carbon thermal reduction device for preparing metal arsenic

Abstract

The utility model provides a circulating fluidization carbon thermal reduction device for preparing metal arsenic. The circulating fluidization carbon thermal reduction device comprises a reduction reaction furnace, a gas-solid separator, a crystallizer and a carbon powder recovery assembly. The reduction reaction furnace can effectively carry out reduction reaction on arsenic trioxide solid and carbon powder under a high-temperature condition to generate arsenic gas and carbon dioxide gas. The gas-solid separator enables arsenic gas and carbon dioxide gas generated by the reaction to be efficiently separated from unreacted carbon powder. The crystallizer enables arsenic gas to be fully condensed and crystallized into metal arsenic solids, and a fixed exhaust port and a gas exhaust port in the crystallizer are respectively used for discharging the metal arsenic solids and carbon dioxide gas, so that effective separation and collection of products are realized. Due to the arrangement of the carbon powder recycling assembly, the carbon powder can be recycled again, the resource utilization rate is remarkably increased, the production cost is reduced, and the economical efficiency and sustainability of the whole device are improved.

Description

Technical Field

[0001] This utility model relates to the field of metallic arsenic preparation technology, and in particular to a circulating fluidized carbothermal reduction apparatus for preparing metallic arsenic. Background Technology

[0002] Metallic arsenic is an important chemical raw material with wide applications in semiconductor materials, optoelectronic materials, and medicine. Traditional methods for preparing metallic arsenic mostly employ chemical reduction, but this method suffers from high energy consumption and significant environmental pollution. In recent years, the circulating fluidized carbothermal reduction method has gradually become one of the important methods for preparing metallic arsenic due to its high efficiency and environmental friendliness.

[0003] In existing arsenic metal reduction devices, carbon powder needs to be effectively recovered and reused. Traditional methods for recovering carbon powder in arsenic metal reduction devices often involve setting up a waste discharge port at the end of the reactor and then transporting it by conveyor belt or manually. This lacks automation and intelligent support, resulting in problems such as low recovery efficiency and complex operation, making it difficult to meet the needs of circulating fluidized carbothermal reduction.

[0004] Therefore, there is a need to provide a circulating fluidized carbothermal reduction apparatus for the preparation of metallic arsenic to solve the above-mentioned technical problems. Utility Model Content

[0005] This invention provides a circulating fluidized carbothermal reduction apparatus for preparing metallic arsenic, which solves the problems of complex and inefficient carbon powder recovery systems in the prior art, which increase production costs.

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is: a circulating fluidized carbothermal reduction apparatus for preparing metallic arsenic, comprising:

[0007] A reduction reactor is provided with a reactant input port at one end and a reactant output port at the other end. The reduction reactor is used to generate arsenic gas and carbon dioxide gas by reducing solid arsenic trioxide with carbon powder under high temperature conditions.

[0008] A gas-solid separator, connected to the reactant output port, is used to separate the arsenic gas and carbon dioxide gas produced by the reaction from the unreacted carbon powder.

[0009] A crystallizer, connected to a gas-solid separator, is provided with a fixed outlet and a gas outlet. The crystallizer is used to condense and crystallize arsenic gas into solid metallic arsenic. The solid metallic arsenic is discharged from the solid outlet, and the carbon dioxide gas is discharged from the gas outlet. The solid metallic arsenic is discharged from the crystallizer from the solid outlet.

[0010] A toner recovery assembly is installed inside the reduction reactor. One end of the toner recovery assembly is connected to the reactant output port, and the other end extends to the reactant input port. The toner recovery assembly transports the toner from the reactant output port to the reactant input port.

[0011] In this invention, the reduction reactor includes:

[0012] The furnace body has a conveying channel inside, and the reactant input port and reactant output port are located at both ends of the furnace body, respectively.

[0013] A base is disposed below the furnace body, and the base is used to support the furnace body;

[0014] With the plane of the base as a reference, the height of the reactant input port is greater than the height of the reactant output port, and the height of the furnace body gradually decreases at the end near the reactant output port.

[0015] In this invention, the reduction reactor further includes:

[0016] A spiral tube conveyor is located inside the furnace body. The spiral tube conveyor assembly is used to rotate and convey solid arsenic trioxide and carbon powder.

[0017] A support frame is disposed within the furnace body, and the spiral tube conveyor is rotatably connected to the support frame; and

[0018] A drive motor is connected to the spiral tube conveyor, and the drive motor drives the spiral tube conveyor to rotate.

[0019] In this invention, the reduction reactor further includes:

[0020] A support roller is mounted on the base, and a rolling ring is mounted on the support roller, the rolling ring being fitted onto the furnace body; and

[0021] A mechanical jack is mounted on the base and is located on the side of the support roller away from the reactant output port. The mechanical jack is connected to one side of the support roller and is used to adjust the tilt angle of the support roller.

[0022] In this invention, the toner recovery component includes:

[0023] A support plate is disposed inside the furnace body and located near the reactant output port. The support plate is provided with a vent for the passage of arsenic gas and carbon dioxide gas.

[0024] The inner cylinder is a hollow cylindrical structure. One end of the inner cylinder is connected to the support plate, and the other end extends to the reactant input port. An inner spiral blade is disposed inside the inner cylinder. An inlet is located near the outer side of the support plate, and an outlet is located at the other end of the inner cylinder.

[0025] A material plate is disposed on one side of the inner cylinder, and the top side of the material plate is connected to the feed port. The material plate is used to transport the carbon powder from the reactant output port to the feed port.

[0026] In this utility model, the support plate includes:

[0027] A fixing part is located in the middle of the support plate, and one side of the fixing part is connected to one end of the inner cylinder;

[0028] The rod component is provided in several groups, and the several groups of rod components are arranged around the periphery of the fixed part, and the rod component is fixedly connected to the furnace body;

[0029] A baffle, located on one side of the material plate and connected to the fixing part, is used to define the position of the toner within the material plate; and

[0030] A mesh is located on the side of the fixing part, the mesh is connected to the rod component, and a plurality of ventilation openings are provided on the mesh.

[0031] In this invention, a guide groove is provided on one side of the material plate. The cross-section of the guide groove is arc-shaped, and the opening of the guide groove faces the rotation direction of the furnace body.

[0032] This utility model also includes an exhaust gas processor, which is connected to the gas outlet and is used to process and purify the emitted carbon dioxide gas.

[0033] In this utility model, the movement trajectory of the support plate includes an upper material position and an lower material position. The upper material position is below the lower material position. When the support plate is at the upper material position, the inlet is above the material plate, and the carbon powder rolls to the material plate along with the furnace body.

[0034] When the support plate is located at the feeding position and the material plate is located above the inlet, the carbon powder enters the inlet from the material plate under the action of gravity.

[0035] In this invention, the toner recovery assembly further includes a support rod, which is connected to the outer wall of the inner cylinder and the furnace body.

[0036] In this invention, the support plate is an integral structure, and the guide groove is formed between the baffle and the material plate.

[0037] Compared with the prior art, the advantages of this invention are as follows: In the circulating fluidized carbothermal reduction apparatus for preparing metallic arsenic, the reduction reactor can effectively reduce solid arsenic trioxide with carbon powder under high temperature conditions, generating arsenic gas and carbon dioxide gas. This reaction process directly generates the target product, arsenic gas, simplifying subsequent processing steps. The gas-solid separator enables efficient separation of the arsenic gas and carbon dioxide gas generated by the reaction from the unreacted carbon powder; this not only ensures the smooth progress of subsequent processes and helps improve the purity of the final metallic arsenic, but also reduces the complexity of subsequent processing and avoids the potential impact of carbon powder on the purity of metallic arsenic. The separated gas and solid can be processed separately, improving the flexibility and controllability of the entire preparation process. The crystallizer allows the arsenic gas to be fully condensed and crystallized into solid metallic arsenic. This step not only improves the purity of metallic arsenic but also ensures the stability and reliability of crystallization efficiency. The fixed outlet and gas outlet in the crystallizer are used to discharge solid metallic arsenic and carbon dioxide gas, respectively, achieving effective separation and collection of the product. The toner recycling unit enables toner to be recycled and reused, significantly improving resource utilization, reducing production costs, and enhancing the economic efficiency and sustainability of the entire system. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments are briefly introduced below. The drawings described below are only the corresponding drawings of some embodiments of this utility model.

[0039] Figure 1 This is a schematic diagram of the overall structure of a preferred embodiment of the present invention.

[0040] Figure 2 This is a schematic diagram of the connection structure of the reduction reactor and the toner recovery component in a preferred embodiment of the present invention.

[0041] Figure 3 This is a schematic diagram of the toner recovery component structure according to a preferred embodiment of the present invention.

[0042] Figure 4 This is a schematic diagram of the internal structure of the toner recovery component according to a preferred embodiment of the present invention.

[0043] Reference numerals: 11. Reduction reactor; 111. Furnace body; 1111. Reactant input port; 1112. Reactant output port; 112. Base; 113. Support roller; 114. Roller ring; 115. Mechanical jack; 12. Gas-solid separator; 13. Crystallizer; 131. Fixed outlet; 132. Gas outlet; 14. Carbon powder recovery assembly; 141. Support plate; 1411. Fixing part; 1412. Rod component; 1413. Baffle; 1414. Grid; 142. Inner cylinder; 1421. Feed port; 1422. Discharge port; 1423. Inner spiral blade; 143. Material plate; 1431. Guide chute; 144. Support rod; 15. Tail gas processor; 16. Conveyor belt feeder; 17. Preheating furnace. Detailed Implementation

[0044] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0045] In the diagram, units with similar structures are represented by the same labels.

[0046] The terms "first" and "second" in this utility model are used for descriptive purposes only and should not be construed as indicating or implying relative importance, nor as a restriction on the order of events.

[0047] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the overall structure of a preferred embodiment of the present invention.

[0048] The following is a preferred embodiment of a circulating fluidized carbothermal reduction apparatus for preparing metallic arsenic, which can solve the above-mentioned technical problems provided by this utility model.

[0049] A preferred embodiment of the circulating fluidized carbothermal reduction apparatus for preparing metallic arsenic provided by this utility model is as follows: The circulating fluidized carbothermal reduction apparatus for preparing metallic arsenic includes a reduction reactor 11, a gas-solid separator 12, a crystallizer 13, and a carbon powder recovery assembly 14. The reduction reactor 11 has a reactant input port 1111 at one end and a reactant output port 1112 at the other end. The reduction reactor 11 is used to generate arsenic gas and carbon dioxide gas by a reduction reaction between solid arsenic trioxide and carbon powder under high temperature conditions. The gas-solid separator 12 is connected to the reactant output port 1112 and is used to separate the generated arsenic gas and carbon dioxide gas from the unreacted carbon powder. The gas-solid separator 12 adopts efficient cyclone separation technology, which can ensure effective separation of unreacted carbon powder and gas, avoiding the influence of carbon powder on subsequent processes. The crystallizer 13 is connected to the gas-solid separator 12 and is provided with a fixed outlet 131 and a gas outlet 132. Crystallizer 13 is used to condense and crystallize arsenic gas into solid metallic arsenic. The solid metallic arsenic is discharged from the solid outlet, and carbon dioxide gas is discharged from the gas outlet 132. Carbon powder recovery assembly 14 is installed inside reduction reactor 11. One end of carbon powder recovery assembly 14 is connected to reactant output port 1112 of furnace body 111, and the other end of carbon powder recovery assembly 14 extends to reactant input port 1111, conveying carbon powder from reactant output port 1112 to reactant input port 1111.

[0050] In this invention, the reduction reactor 11 effectively reduces solid arsenic trioxide with carbon powder at high temperatures, generating arsenic gas and carbon dioxide gas. This reaction directly produces the target product, arsenic gas, simplifying subsequent processing steps. The gas-solid separator 12 efficiently separates the arsenic gas and carbon dioxide gas generated from the reaction from the unreacted carbon powder. This not only ensures the smooth progress of subsequent processes and helps improve the purity of the final metallic arsenic, but also reduces the complexity of subsequent processing and avoids the potential impact of carbon powder on the purity of metallic arsenic. The separated gas and solid can be processed separately, improving the flexibility and controllability of the entire preparation process. The crystallizer 13 allows the arsenic gas to be fully condensed and crystallized into solid metallic arsenic. This step not only improves the purity of metallic arsenic but also ensures the stability and reliability of crystallization efficiency. The fixed outlet 131 and gas outlet 132 in the crystallizer 13 are used to discharge solid metallic arsenic and carbon dioxide gas, respectively, achieving effective separation and collection of the product. The toner recycling component 14 enables toner to be recycled and reused, significantly improving resource utilization, reducing production costs, and enhancing the economy and sustainability of the entire system.

[0051] In summary, this circulating fluidized carbothermal reduction apparatus achieves efficient and environmentally friendly preparation of metallic arsenic through the synergistic effect of its components. The design of each component fully considers the requirements of production efficiency and product quality, ensuring the smooth operation of the entire preparation process.

[0052] The structure of the reduction reactor 11 in this embodiment is described below:

[0053] Combination Figure 1 and Figure 2 In this embodiment, the reduction reactor 11 includes a furnace body 111 and a base 112. A conveying channel is provided inside the furnace body 111, and a reactant input port 1111 and a reactant output port 1112 are located at opposite ends of the furnace body 111. The base 112 is positioned below the furnace body 111 and supports the furnace body 111. The base 112 employs a stable structural design to ensure that the furnace body 111 will not shake or tilt during operation. Along the plane of the base 112, the height of the reactant input port 1111 is greater than the height of the reactant output port 1112, and the height of the furnace body 111 gradually decreases towards the end near the reactant output port 1112.

[0054] In this embodiment, the reduction reactor 11 further includes a support roller 113 and a mechanical jack 115. The support roller 113 is mounted on the base 112, and a rolling ring 114 is mounted on the support roller 113, which is fitted onto the furnace body 111. The mechanical jack 115 is mounted on the base 112, located on the side of the support roller 113 away from the reactant output port 1112, and connected to one side of the support roller 113, for adjusting the tilt angle of the support roller 113. The mechanical jack 115 is used to adjust the tilt angle of the support roller 113, thereby changing the tilt degree of the furnace body 111. By adjusting the tilt degree of the furnace body 111, the transport of reactants within the furnace body 111 can be made smoother, improving reaction efficiency.

[0055] The toner recovery component 14 in this embodiment will be described in detail below:

[0056] Combination Figure 2 , Figure 3 and Figure 4 In this embodiment, the toner recovery assembly 14 includes a support plate 141, an inner cylinder 142, and a material plate 143. The support plate 141 is disposed inside the furnace body 111 and is located near the reactant output port 1112. A vent is provided on the support plate 141 for the passage of arsenic gas and carbon dioxide gas. The position design of the support plate 141 enables toner recovery without affecting the emission of reaction gases. The vent allows the gas to pass smoothly without being blocked by the accumulation of toner.

[0057] The inner cylinder 142 is a hollow cylindrical structure. One end of the inner cylinder 142 is connected to the support plate 141, and the other end extends to the reactant input port 1111. An inner spiral blade 1423 is installed inside the inner cylinder 142. An inlet 1421 is located near the outer side of the support plate 141, and an outlet 1422 is located at the other end of the inner cylinder 142. The inner spiral blade 1423 allows for smooth transport of toner. The recovered toner enters the inner cylinder 142 through the inlet 1421 and exits through the outlet 1422. A material plate 143 is located on one side of the inner cylinder 142, and its top end is connected to the inlet 1421. The material plate 143 is used to transport the toner from the reactant output port 1112 to the inlet 1421. By combining the support plate 141, the inner cylinder 142, and the material plate 143, a complete carbon powder recovery system is formed as the furnace body 111 and the inner cylinder 142 rotate synchronously, which can effectively recover carbon powder near the reactant output port 1112.

[0058] In this embodiment, a guide trough 1431 is provided on one side of the material plate 143. The guide trough 1431 has an arc-shaped cross-section, and its opening faces the rotation direction of the reactor. The design of the guide trough 1431 guides the toner along a specific path into the feed inlet 1421, improving the efficiency of the toner recovery assembly 14 in recovering toner, while avoiding toner scattering and waste. The arc-shaped guide trough 1431's opening faces the rotation direction of the furnace body 111, allowing the toner to enter the feed inlet 1421 as the furnace body 111 rotates.

[0059] In this embodiment, the support plate 141 includes a fixing part 1411, a rod component 1412, a baffle 1413, and a mesh 1414. The fixing part 1411 is located in the middle of the support plate 141, and one side of the fixing part 1411 is connected to one end of the inner cylinder 142. Several sets of rod components 1412 are provided, and the several sets of rod components 1412 are arranged around the fixing part 1411. The rod components 1412 are fixedly connected to the furnace body 111. The baffle 1413 is located on one side of the material plate 143 and is connected to the fixing part 1411. The baffle 1413 is used to limit the position of the carbon powder in the material plate 143. The mesh 1414 is located on the side of the fixing part 1411 and is connected to the rod component 1412. Several ventilation holes are provided on the mesh 1414. The design of the support plate 141 not only provides a stable support structure, but also effectively limits the position of the toner and provides ventilation openings through the design of the baffle 1413 and the grid 1414, ensuring the stability of the structure for recycling toner and the smooth discharge of gas.

[0060] The movement trajectory of the support plate 141 includes the loading and unloading positions. When the support plate 141 is in the loading position, the inlet 1421 is above the material plate 143, and the toner rolls with the furnace body 111 to the guide chute 1431 of the material plate 143. When the support plate 141 is in the unloading position, the material plate 143 is above the inlet 1421, and the toner enters the inlet 1421 from the material plate 143 under the action of gravity. The toner can be effectively collected and transported at different positions, improving the toner recovery efficiency.

[0061] In this embodiment, the toner recovery assembly 14 further includes a support rod 144, which is connected to the outer wall of the inner cylinder 142 and the furnace body 111. The support rod 144 improves the stability of the connection between the inner cylinder 142 and the furnace body 111.

[0062] In this embodiment, the support plate 141 is an integral structure, and a guide groove 1431 is formed between the baffle 1413 and the material plate 143. The integrated design simplifies the structure of the components and improves the overall stability and durability.

[0063] The following describes the other structures of the circulating fluidized carbothermal reduction apparatus used to prepare metallic arsenic in this embodiment:

[0064] Combination Figure 1 The device also includes a conveyor belt feeder 16 and a preheating furnace 17. The conveyor belt feeder 16 is located on one side of the reduction reactor 11. The conveyor belt feeder 16 is used to transport solid arsenic trioxide via a conveyor belt. The preheating furnace 17 is connected to the output end of the conveyor belt feeder 16. The preheating furnace 17 is used to preheat the solid arsenic trioxide, which facilitates the subsequent equipment to improve the reduction efficiency of preparing metallic arsenic.

[0065] The device also includes an exhaust gas processor 15, which is connected to the gas outlet 132 to treat and purify the emitted carbon dioxide gas, thereby reducing environmental pollution.

[0066] The working principle of the circulating fluidized carbothermal reduction apparatus for preparing metallic arsenic in this invention is as follows:

[0067] I. Feeding and preheating.

[0068] Solid arsenic trioxide is conveyed to preheating furnace 17 using conveyor belt feeder 16. The solid arsenic trioxide is preheated in preheating furnace 17 to improve its reactivity and facilitate subsequent reduction reaction.

[0069] II. Reduction reaction.

[0070] Preheated arsenic trioxide solid and carbon powder are fed into reduction reactor 11 through reactant input port 1111. Under high temperature conditions, arsenic trioxide solid and carbon powder undergo a reduction reaction in reduction reactor 11 to generate arsenic gas and carbon dioxide gas.

[0071] In this embodiment, the inclined placement of the furnace body 111 makes the transport of reactants within the furnace body 111 smoother.

[0072] III. Gas-solid separation.

[0073] The gas is separated from the carbon powder. The arsenic gas and carbon dioxide gas produced by the reaction, along with the unreacted carbon powder, enter the gas-solid separator 12 through the reactant output port 1112. The gas-solid separator 12 uses high-efficiency cyclone separation technology to effectively separate the unreacted carbon powder from the gas.

[0074] IV. Crystallization and exhaust gas treatment.

[0075] The separated arsenic gas enters crystallizer 13, where it condenses and crystallizes into solid metallic arsenic, which is then discharged from the solid outlet. Carbon dioxide gas is discharged from gas outlet 132. The emitted carbon dioxide gas is sent to exhaust gas processor 15 for treatment and purification to reduce environmental pollution. In this embodiment, exhaust gas processor 15 is a bag filter.

[0076] V. Carbon powder recovery.

[0077] 1. As the furnace body 111 rotates, the support plate 141 gradually moves to the feeding position. At this time, the feed inlet 1421 is located above the feed plate 143, and the carbon powder near the reactant output port 1112 is guided onto the feed plate 143 as the furnace body 111 rotates. The carbon powder continues to move on the feed plate 143 until it enters the guide chute 1431. This allows the carbon powder to slide more smoothly along the guide chute 1431 into the feed inlet 1421.

[0078] 2. As the furnace body 111 continues to rotate, the support plate 141 gradually moves to the unloading position. The carbon powder is fed into the inner cylinder 142, and the inner spiral blades 1423 inside the inner cylinder 142 begin to work, smoothly conveying the carbon powder along the inner cylinder 142 to the discharge port 1422.

[0079] 3. When the discharge port 1422 of the inner cylinder 142 of the carbon powder falls into the reactant input port 1111 of the furnace body 111, the carbon powder is recycled.

[0080] This completes the process of a circulating fluidized carbothermal reduction apparatus for preparing metallic arsenic according to this preferred embodiment. This invention, through its fluidized circulation structure, increases the contact area and reaction time between refined arsenic and carbon powder, thereby improving the reaction rate; the apparatus recycles the carbon powder, ensuring complete reaction; and a gas-solid separator combined with a crystallizer is used to condense and collect arsenic, enhancing the purity of the collected refined arsenic.

[0081] In summary, although the present invention has been disclosed above with reference to preferred embodiments, the above preferred embodiments are not intended to limit the present invention. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope defined in the claims.

Claims

1. A circulating fluidized carbothermal reduction apparatus for preparing metallic arsenic, characterized in that, include: A reduction reactor is provided with a reactant input port at one end and a reactant output port at the other end. The reduction reactor is used to generate arsenic gas and carbon dioxide gas by reducing solid arsenic trioxide with carbon powder under high temperature conditions. A gas-solid separator, connected to the reactant output port, is used to separate the arsenic gas and carbon dioxide gas produced by the reaction from the unreacted carbon powder. A crystallizer is connected to a gas-solid separator. The crystallizer is provided with a fixed outlet and a gas outlet. The crystallizer is used to condense and crystallize arsenic gas into metallic arsenic solid. The metallic arsenic solid is discharged from the solid outlet, and the carbon dioxide gas is discharged from the gas outlet. as well as A toner recovery assembly is installed inside the reduction reactor. One end of the toner recovery assembly is connected to the reactant output port, and the other end extends to the reactant input port. The toner recovery assembly transports the toner from the reactant output port to the reactant input port.

2. The circulating fluidized carbothermal reduction apparatus for preparing metallic arsenic according to claim 1, characterized in that, The reduction reactor includes: The furnace body has a conveying channel inside, and the reactant input port and reactant output port are located at both ends of the furnace body, respectively. A base is disposed below the furnace body, and the base is used to support the furnace body; With the plane of the base as a reference, the height of the reactant input port is greater than the height of the reactant output port, and the height of the furnace body gradually decreases at the end near the reactant output port.

3. The circulating fluidized carbothermal reduction apparatus for preparing metallic arsenic according to claim 2, characterized in that, The toner recovery assembly includes: A support plate is disposed inside the furnace body and located near the reactant output port. The support plate is provided with a vent for the passage of arsenic gas and carbon dioxide gas. The inner cylinder is a hollow cylindrical structure. One end of the inner cylinder is connected to the support plate, and the other end extends to the reactant input port. An inner spiral blade is disposed inside the inner cylinder. An inlet is located near the outer side of the support plate, and an outlet is located at the other end of the inner cylinder. A material plate is disposed on one side of the inner cylinder, and the top side of the material plate is connected to the feed port. The material plate is used to transport the carbon powder from the reactant output port to the feed port.

4. The circulating fluidized carbothermal reduction apparatus for preparing metallic arsenic according to claim 3, characterized in that, The support plate includes: A fixing part is located in the middle of the support plate, and one side of the fixing part is connected to one end of the inner cylinder; The rod component is provided in several groups, and the several groups of rod components are arranged around the periphery of the fixed part, and the rod component is fixedly connected to the furnace body; A baffle, located on one side of the material plate and connected to the fixing part, is used to define the position of the toner within the material plate; and A mesh is located on the side of the fixing part, the mesh is connected to the rod component, and a plurality of ventilation openings are provided on the mesh.

5. A circulating fluidized carbothermal reduction apparatus for preparing metallic arsenic according to claim 4, characterized in that, A guide trough is provided on one side of the material plate. The cross-section of the guide trough is arc-shaped, and the opening of the guide trough faces the rotation direction of the furnace body.

6. The circulating fluidized carbothermal reduction apparatus for preparing metallic arsenic according to claim 2, characterized in that, The reduction reactor also includes: A support roller is mounted on the base, and a rolling ring is mounted on the support roller, the rolling ring being fitted onto the furnace body; and A mechanical jack is mounted on the base and is located on the side of the support roller away from the reactant output port. The mechanical jack is connected to one side of the support roller and is used to adjust the tilt angle of the support roller.

7. The circulating fluidized carbothermal reduction apparatus for preparing metallic arsenic according to claim 1, characterized in that, It also includes an exhaust gas processor connected to the gas outlet, the exhaust gas processor being used to treat and purify the emitted carbon dioxide gas.

8. A circulating fluidized carbothermal reduction apparatus for preparing metallic arsenic according to claim 3, characterized in that, The movement trajectory of the support plate includes the loading position and the unloading position. The loading position is below the unloading position. When the support plate is at the loading position, the inlet is above the material plate, and the carbon powder rolls to the material plate with the furnace body. When the support plate is located at the feeding position and the material plate is located above the inlet, the carbon powder enters the inlet from the material plate under the action of gravity.

9. A circulating fluidized carbothermal reduction apparatus for preparing metallic arsenic according to claim 3, characterized in that, The toner recovery assembly also includes a support rod, which is connected to the outer wall of the inner cylinder and the furnace body.

10. A circulating fluidized carbothermal reduction apparatus for preparing metallic arsenic according to claim 5, characterized in that, The support plate is an integral structure, and the guide groove is formed between the baffle and the material plate.

Images