Metal arsenic preparation system

Abstract

The invention provides a metal arsenic preparation system. The metal arsenic preparation system comprises a conveyor belt feeding machine, a reduction reaction furnace, a gas-solid separator, a crystallizer and a carbon powder recovery assembly. The conveyor belt feeding machine is used for conveying arsenic trioxide solids; 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] The invention relates to the technical field of metal arsenic preparation, and in particular to a metal arsenic preparation system. Background Art

[0002] Arsenic metal is an important chemical raw material, which is widely used in semiconductor materials, optoelectronic materials and medicine. Traditional methods for preparing arsenic metal mostly use chemical reduction, but this method has problems such as high energy consumption and severe environmental pollution. In recent years, circulating fluidized bed carbon thermal reduction has gradually become one of the important methods for preparing arsenic metal due to its high efficiency and environmental protection.

[0003] In the existing metal arsenic reduction preparation system, carbon powder needs to be effectively recovered and reused. The traditional method of recovering carbon powder in the metal arsenic reduction system is often to set a waste discharge outlet at the end of the reactor, and then transport it by conveyor belt or manual transportation. It lacks automation and intelligent support, and has problems such as low recovery efficiency and complex operation, and is difficult to adapt to the needs of the circulating fluidized bed carbon thermal reduction method.

[0004] Therefore, it is necessary to provide a metal arsenic preparation system to solve the above technical problems. Summary of the invention

[0005] The invention provides a metal arsenic preparation system to solve the problem that the carbon powder recovery system in the prior art is complicated and inefficient, thereby increasing the production cost.

[0006] In order to solve the above technical problems, the technical solution of the present invention is: a metal arsenic preparation system, which comprises:

[0007] Conveyor belt loader for conveying arsenic trioxide solid;

[0008] A reduction reaction furnace, wherein a reactant input port is provided at one end of the reduction reaction furnace, and a reactant output port is provided at the other end of the reduction reaction furnace, and the reduction reaction furnace is used to generate arsenic gas and carbon dioxide gas through a reduction reaction between arsenic trioxide solid and carbon powder under high temperature conditions;

[0009] A gas-solid separator connected to the reactant output port, used to separate the arsenic gas and carbon dioxide gas generated by the reaction from the unreacted carbon powder;

[0010] A crystallizer connected to the gas-solid separator, the crystallizer being provided with a fixed discharge port and a gas discharge port, the crystallizer being used to condense and crystallize the arsenic gas into metallic arsenic solid, the metallic arsenic solid being discharged from the solid discharge port, the carbon dioxide gas being discharged from the gas discharge port, and the metallic arsenic solid being discharged from the crystallizer from the solid discharge port; and

[0011] A carbon powder recovery component is arranged in the reduction reaction furnace, one end of the carbon powder recovery component is connected to the reactant output port, and the other end extends to the reactant input port. The carbon powder recovery component transports the carbon powder from the reactant output port to the reactant input port.

[0012] In the present invention, the reduction reaction furnace comprises:

[0013] A furnace body, wherein a conveying channel is arranged inside the furnace body, and the reactant input port and the reactant output port are respectively located at two ends of the furnace body;

[0014] A base, disposed below the furnace body, and used to support the furnace body;

[0015] Wherein, along the plane where the base is located 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 close to the reactant output port gradually decreases.

[0016] In the present invention, the reduction reaction furnace further comprises:

[0017] A spiral tube conveying component is located in the furnace body, and the spiral tube conveying component is used for rotating and conveying arsenic trioxide solid and carbon powder;

[0018] A support frame is disposed in the furnace body, and the spiral tube conveyor is rotatably connected to the support frame; and

[0019] A driving motor is connected to the spiral tube conveying member, and the driving motor drives the spiral tube conveying member to rotate.

[0020] In the present invention, the reduction reaction furnace further comprises:

[0021] A supporting wheel is arranged on the base, the supporting wheel is provided with a rolling ring, and the rolling ring is sleeved on the furnace body; and

[0022] A mechanical jack is arranged on the base, the mechanical jack is located on the side of the supporting wheel away from the reactant output port, the mechanical jack is connected to one side of the supporting wheel, and the mechanical jack is used to adjust the inclination angle of the supporting wheel.

[0023] In the present invention, the toner recovery component comprises:

[0024] A support plate is arranged inside the furnace body and is located near one end of the reactant output port, and a vent is arranged on the support plate, and the vent is used for arsenic gas and carbon dioxide gas to pass through;

[0025] The inner cylinder is a hollow cylindrical structure, one end of the inner cylinder is connected to the support plate, the other end of the inner cylinder extends to the reactant input port, the inner cylinder is provided with inner spiral blades, the inner cylinder is provided with a feed inlet near the outer side of the support plate, and the other end of the inner cylinder is provided with a discharge port; and

[0026] A material plate is arranged on one side of the inner cylinder, and one side of the top end of the material plate is connected to the feed inlet. The material plate is used to transport the carbon powder at the reactant output port to the feed inlet.

[0027] In the present invention, the support plate comprises:

[0028] A fixing part, located in the middle of the support plate, one side of the fixing part is connected to one end of the inner cylinder;

[0029] Rod components are provided in a plurality of groups, and the plurality of groups of rod components are arranged around the periphery of the fixing portion, and the rod components are fixedly connected to the furnace body;

[0030] a baffle, located at one side of the material plate, and connected to the fixing portion, and used to limit the position of the carbon powder in the material plate; and

[0031] A grid is located at the side of the fixing portion, the grid is connected to the rod component, and a plurality of ventilation holes are arranged on the grid.

[0032] In the present invention, a material guide groove is arranged on one side of the material plate, the cross section of the material guide groove is an arc-shaped structure, and the opening direction of the material guide groove faces the rotation direction of the furnace body.

[0033] The present invention also includes a tail gas processor, which is connected to the gas outlet and is used to process and purify the discharged carbon dioxide gas.

[0034] In the present invention, the movement trajectory of the support plate includes an upper material position and a lower material position, the upper material position is below the lower material position, when the support plate is at the upper material position, the feed port is located above the material plate, and the carbon powder rolls to the material plate along with the furnace body;

[0035] When the support plate is located at the material lowering position, the material plate is located above the material inlet, and the carbon powder enters the material inlet from the material plate under the action of gravity.

[0036] The present invention also includes a preheating furnace, which is arranged between the conveyor belt loader and the reduction reaction furnace, and the preheating furnace preheats the arsenic trioxide solid.

[0037] In the present invention, the support plate is an integrated structure, and the material guide trough is formed between the baffle plate and the material plate.

[0038] Compared with the prior art, the present invention has the following beneficial effects: in a metal arsenic preparation system of the present invention, a conveyor belt feeder is used to transport arsenic trioxide solid; the reduction reaction furnace can effectively reduce arsenic trioxide solid with carbon powder under high temperature conditions to generate arsenic gas and carbon dioxide gas, and the reaction process directly generates the target product arsenic gas, simplifying the subsequent processing steps. The gas-solid separator enables the arsenic gas and carbon dioxide gas generated by the reaction to be efficiently separated from the unreacted carbon powder; this not only ensures the smooth progress of the subsequent process, but also helps to improve the purity of the final metal arsenic, and reduces the complexity of subsequent processing, and avoids the potential impact of carbon powder on the purity of metal arsenic. The separated gas and solid can be subsequently processed separately, which improves the flexibility and controllability of the entire preparation process. The crystallizer enables the arsenic gas to be fully condensed and crystallized into metal arsenic solid. This step not only improves the purity of metal arsenic, but also ensures the stability and reliability of the crystallization efficiency. The fixed discharge port and the gas discharge port in the crystallizer are used to discharge the metal arsenic solid and the carbon dioxide gas, respectively, to achieve effective separation and collection of the products. The setting of the toner recovery component enables the toner to be recycled, which significantly improves resource utilization, reduces production costs, and improves the economy and sustainability of the entire device. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. The drawings described below are only drawings corresponding to some embodiments of the present invention.

[0040] Figure 1 It is a schematic diagram of the overall structure of a preferred embodiment of the present invention.

[0041] Figure 2 It is a schematic diagram of the connection structure of the reduction reaction furnace and the carbon powder recovery component of the preferred embodiment of the present invention.

[0042] Figure 3 The figure is a schematic structural diagram of a toner recovery assembly according to a preferred embodiment of the present invention.

[0043] Figure 4 The figure is a schematic diagram of the internal structure of a toner recovery assembly according to a preferred embodiment of the present invention.

[0044] 14. The axial flow of the carbon fiber into the reactor is carried out according to the present invention. The axial flow of the carbon fiber into the reactor is carried out according to the present invention. The axial flow of the carbon fiber into the reactor is carried out according to the present invention. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0046] In the figures, structurally similar elements are denoted by the same reference numerals.

[0047] The terms "first", "second", etc. in the present invention are used for descriptive purposes only and should not be understood as indicating or implying relative importance, and should not be used as a limitation on the order of precedence.

[0048] Please refer to Figure 1 , Figure 1 It is a schematic diagram of the overall structure of a preferred embodiment of the present invention.

[0049] The following is a preferred embodiment of a metal arsenic preparation system provided by the present invention that can solve the above technical problems.

[0050] A preferred embodiment of a metal arsenic preparation system provided by the present invention is: a metal arsenic preparation system, comprising a conveyor belt feeder 16, a reduction reaction furnace 11, a gas-solid separator 12, a crystallizer 13 and a carbon powder recovery component 14. The conveyor belt feeder 16 is used to transport arsenic trioxide solid; the reduction reaction furnace 11 is provided with a reactant input port 1111 at one end and a reactant output port 1112 at the other end. The reactant input port 1111 is connected to the output end of the conveyor belt feeder 16, and the reduction reaction furnace 11 is used to generate arsenic gas and carbon dioxide gas by a reduction reaction of arsenic trioxide solid 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 arsenic gas and carbon dioxide gas generated by the reaction from the unreacted carbon powder; the gas-solid separator 12 adopts high-efficiency cyclone separation technology, which can ensure that the unreacted carbon powder is effectively separated from the gas, and avoid 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 discharge port 131 and a gas discharge port 132. The crystallizer 13 is used to condense and crystallize the arsenic gas into metallic arsenic solid, which is discharged from the solid discharge port, and the carbon dioxide gas is discharged from the gas discharge port 132. The carbon powder recovery component 14 is arranged in the reduction reaction furnace 11, one end of the carbon powder recovery component 14 is connected to the reactant output port 1112 of the furnace body 111, and the other end of the carbon powder recovery component 14 extends to the reactant input port 1111, and the carbon powder of the reactant output port 1112 is transported to the reactant input port 1111.

[0051] In the present invention, the reduction reaction furnace 11 can effectively reduce arsenic trioxide solid and carbon powder under high temperature conditions to generate arsenic gas and carbon dioxide gas. The reaction process directly generates the target product arsenic gas, simplifying the subsequent processing steps. The gas-solid separator 12 enables the arsenic gas and carbon dioxide gas generated by the reaction to be efficiently separated from the unreacted carbon powder; this not only ensures the smooth progress of the subsequent process, but also helps to improve the purity of the final metal arsenic, and reduces the complexity of the subsequent processing, and avoids the potential impact of carbon powder on the purity of the metal arsenic. The separated gas and solid can be subsequently processed separately, which improves the flexibility and controllability of the entire preparation process. The crystallizer 13 enables the arsenic gas to be fully condensed and crystallized into metal arsenic solid. This step not only improves the purity of metal arsenic, but also ensures the stability and reliability of the crystallization efficiency. The fixed discharge port 131 and the gas discharge port 132 in the crystallizer 13 are used to discharge the metal arsenic solid and carbon dioxide gas, respectively, to achieve effective separation and collection of the products. The setting of the carbon powder recovery component 14 enables the carbon powder to be recycled, significantly improves the resource utilization rate, reduces the production cost, and improves the economy and sustainability of the entire device.

[0052] In summary, the circulating fluidized carbon thermal reduction device achieves efficient and environmentally friendly preparation of metallic arsenic through the synergistic effect of various components. The design of each component fully considers the requirements of production efficiency and product quality, ensuring the smoothness of the entire preparation process.

[0053] The structure of the reduction reaction furnace 11 in this embodiment is described as follows:

[0054] Combination Figure 1 and Figure 2 In this embodiment, the reduction reaction furnace 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 respectively located at both ends of the furnace body 111. The base 112 is provided below the furnace body 111, and the base 112 is used to support the furnace body 111. The base 112 adopts a stable structural design to ensure that the furnace body 111 does not shake or tilt during operation. Taking the plane where the base 112 is located as a reference, 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 close to the reactant output port 1112 gradually decreases.

[0055] In this embodiment, the reduction reaction furnace 11 further includes a supporting wheel 113 and a mechanical jack 115. The supporting wheel 113 is arranged on the base 112, and a roller 114 is arranged on the supporting wheel 113, and the roller 114 is sleeved on the furnace body 111. The mechanical jack 115 is arranged on the base 112, located on the side of the supporting wheel 113 away from the reactant output port 1112, and is connected to one side of the supporting wheel 113, and is used to adjust the inclination angle of the supporting wheel 113. The mechanical jack 115 is used to adjust the inclination angle of the supporting wheel 113, thereby changing the inclination degree of the furnace body 111. By adjusting the inclination degree of the furnace body 111, the transport of the reactants in the furnace body 111 can be made smoother, thereby improving the reaction efficiency.

[0056] The toner recovery assembly 14 in this embodiment is described in detail as follows:

[0057] Combination Figure 2 , Figure 3 and Figure 4 In this embodiment, the carbon powder recovery component 14 includes a support plate 141, an inner cylinder 142 and a material plate 143; the support plate 141 is arranged inside the furnace body 111, and the support plate 141 is located near the end of the reactant output port 1112, and a vent is provided on the support plate 141, and the vent is used for arsenic gas and carbon dioxide gas to pass through; the position design of the support plate 141 can recover carbon powder without affecting the discharge of the reaction gas; the setting of the vent allows the gas to pass smoothly without being blocked by the accumulation of carbon powder.

[0058] The inner cylinder 142 is a hollow cylindrical structure, one end of the inner cylinder 142 is connected to the support plate 141, the other end of the inner cylinder 142 extends to the reactant input port 1111, an inner spiral blade 1423 is arranged inside the inner cylinder 142, an inlet 1421 is arranged near the outer side of the support plate 141, and an outlet 1422 is arranged at the other end of the inner cylinder 142; the inner cylinder 142 is provided with the inner spiral blade 1423, so that the carbon powder can be smoothly transported, and the recovered carbon powder enters the inner cylinder 142 from the inlet 1421 and is discharged from the outlet 1422. The material plate 143 is arranged on one side of the inner cylinder 142, and the top side of the material plate 143 is connected to the inlet 1421, and the material plate 143 is used to transport the carbon powder from the reactant output port 1112 to the inlet 1421. Through the combination of the support plate 141 , the inner cylinder 142 and the material plate 143 , as the furnace body 111 and the inner cylinder 142 rotate synchronously, a complete carbon powder recovery system is formed, which can effectively recover the carbon powder near the reactant output port 1112 .

[0059] In this embodiment, a guide groove 1431 is provided on one side of the material plate 143. The cross section of the guide groove 1431 is an arc-shaped structure, and the opening direction of the guide groove 1431 faces the rotation direction of the reaction furnace. The design of the guide groove 1431 can guide the carbon powder to slide into the feed port 1421 along a specific path, thereby improving the efficiency of the carbon powder recovery component 14 in recovering carbon powder, while avoiding the scattering and waste of carbon powder. The opening direction of the arc-shaped guide groove 1431 faces the rotation direction of the furnace body 111, so that the carbon powder can enter the feed port 1421 as the furnace body 111 rotates.

[0060] In this embodiment, the support plate 141 includes a fixed portion 1411, a rod component 1412, a baffle 1413 and a grid 1414. The fixed portion 1411 is located in the middle of the support plate 141, and one side of the fixed portion 1411 is connected to one end of the inner tube 142; the rod component 1412 is provided with a plurality of groups, and the plurality of groups of rod components 1412 are arranged around the fixed portion 1411, and the rod component 1412 is fixedly connected to the furnace body 111; the baffle 1413 is located on one side of the material plate 143, and the baffle 1413 is connected to the fixed portion 1411, and the baffle 1413 is used to limit the position of the carbon powder in the material plate 143; the grid 1414 is located on the side of the fixed portion 1411, and the grid 1414 is connected to the rod component 1412, and a plurality of ventilation holes are provided on the grid 1414. The design of the support plate 141 not only provides a stable support structure, but also effectively defines the position of the carbon powder and provides ventilation holes through the design of the baffle 1413 and the grid 1414, thereby ensuring the stability of the structure for recovering carbon powder and the smooth discharge of gas.

[0061] The movement track of the support plate 141 includes an upper material position and a lower material position. When the support plate 141 is at the upper material position, the feed port 1421 is located above the material plate 143, and the carbon powder rolls along the furnace body 111 to the guide groove 1431 of the material plate 143; when the support plate 141 is at the lower material position, the material plate 143 is located above the feed port 1421, and the carbon powder enters the feed port 1421 from the material plate 143 under the action of gravity. Carbon powder can be effectively collected and transported at different positions, thereby improving the recovery efficiency of carbon powder.

[0062] In this embodiment, the carbon powder recovery assembly 14 further includes a support rod 144, and the support rod 144 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.

[0063] In this embodiment, the support plate 141 is an integrated structure, and a material guide groove 1431 is formed between the baffle plate 1413 and the material plate 143. The integrated design simplifies the structure of the component and improves the overall stability and durability.

[0064] The other structures of the metal arsenic preparation system in this embodiment are described as follows:

[0065] Combination Figure 1 The metal arsenic preparation system also includes a preheating furnace 17. A conveyor belt loader 16 is arranged on one side of the reduction reaction furnace 11. The conveyor belt loader 16 is used to transport arsenic trioxide solid through a conveyor belt. The preheating furnace 17 is arranged between the conveyor belt loader 16 and the reduction reaction furnace 11. The preheating furnace 17 is vertically arranged. The top of the preheating furnace 17 is connected to the output end of the conveyor belt loader 16, and the bottom of the preheating furnace 17 is connected to the reactant input port 1111 of the reduction reaction furnace 11. The preheating furnace 17 is used to preheat the arsenic trioxide solid to facilitate the subsequent device to improve the reduction efficiency of the preparation of metal arsenic.

[0066] Furthermore, preheating baffles are relatively staggeredly arranged in the preheating furnace 17 in this embodiment, and the preheating baffles are used to delay the falling time of the arsenic trioxide solid in the preheating furnace 17 to improve the preheating effect of the arsenic trioxide solid in the preheating furnace 17.

[0067] Since the preheating furnace 17 in this embodiment is arranged vertically, the gas (such as carbon dioxide gas) generated in the preheating furnace 17 will be discharged upward, so a gas processor is also connected to the side of the preheating furnace 17, and the gas processor is used to process and purify the discharged carbon dioxide gas to reduce environmental pollution.

[0068] The metal arsenic preparation system further includes a tail gas processor 15, which is connected to the gas outlet 132 and is used to process and purify the discharged carbon dioxide gas to reduce environmental pollution.

[0069] The working principle of the metal arsenic preparation system of the present invention is:

[0070] 1. Loading and preheating.

[0071] The arsenic trioxide solid is transported to the preheating furnace 17 by a conveyor belt feeder 16. The arsenic trioxide solid is preheated in the preheating furnace 17 to increase its reaction activity and facilitate the subsequent reduction reaction.

[0072] 2. Reduction reaction.

[0073] The preheated arsenic trioxide solid and carbon powder are input into the reduction reaction furnace 11 through the reactant input port 1111. Under high temperature conditions, the arsenic trioxide solid and carbon powder undergo a reduction reaction in the reduction reaction furnace 11 to generate arsenic gas and carbon dioxide gas.

[0074] In this embodiment, the furnace body 111 is tilted so that the reactants can be transported more smoothly in the furnace body 111 .

[0075] 3. Gas-solid separation.

[0076] The gas is separated from the carbon powder, and the arsenic gas and carbon dioxide gas generated by the reaction and the unreacted carbon powder enter the gas-solid separator 12 through the reactant output port 1112. The gas-solid separator 12 adopts high-efficiency cyclone separation technology to effectively separate the unreacted carbon powder from the gas.

[0077] 4. Crystallization and tail gas treatment.

[0078] The separated arsenic gas enters the crystallizer 13, condenses and crystallizes into metallic arsenic solid, and is discharged from the solid discharge port; the carbon dioxide gas is discharged from the gas discharge port 132. The discharged carbon dioxide gas is sent to the tail gas processor 15 for treatment and purification to reduce environmental pollution. The tail gas processor 15 in this embodiment is a bag filter.

[0079] 5. Toner recycling.

[0080] 1. As the furnace body 111 rotates, the support plate 141 gradually moves to the loading position. At this time, the feed port 1421 is located above the material plate 143, and the carbon powder near the reactant output port 1112 is guided to the material plate 143 as the furnace body 111 rolls. The carbon powder continues to move on the material plate 143 until it enters the guide groove 1431, so that the carbon powder can slide into the feed port 1421 more smoothly along the guide groove 1431.

[0081] 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 start to work, smoothly conveying the carbon powder along the inner cylinder 142 to the discharge port 1422.

[0082] 3. When the discharge port 1422 of the carbon powder inner cylinder 142 falls to the reactant input port 1111 of the furnace body 111, the carbon powder is recycled.

[0083] In this way, the process of a metal arsenic preparation system of the preferred embodiment is completed. The present invention increases the contact area and reaction time of refined white arsenic and carbon powder through the structure of fluidized circulation, and improves the reaction rate; the device recycles the carbon powder, and the carbon powder reacts completely; and the gas-solid separator and the crystallizer are used to condense and collect arsenic, thereby improving the purity of the collected refined white arsenic.

[0084] In summary, although the present invention has been disclosed as above in terms of preferred embodiments, the above preferred embodiments are not intended to limit the present invention. A person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope defined in the claims.

Claims

1. A metallic arsenic preparation system, characterized in that: include: Conveyor belt loader for conveying arsenic trioxide solid; A reduction reaction furnace, wherein a reactant input port is provided at one end of the reduction reaction furnace, the reactant input port is connected to the transmission belt feeder, and a reactant output port is provided at the other end of the reduction reaction furnace, and the reduction reaction furnace is used to generate arsenic gas and carbon dioxide gas through a reduction reaction between arsenic trioxide solid and carbon powder under high temperature conditions; A gas-solid separator connected to the reactant output port, used to separate the arsenic gas and carbon dioxide gas generated by the reaction from the unreacted carbon powder; A crystallizer connected to the gas-solid separator, the crystallizer is provided with a fixed discharge port and a gas discharge port, the crystallizer is used to condense and crystallize the arsenic gas into metallic arsenic solid, the metallic arsenic solid is discharged from the solid discharge port, the carbon dioxide gas is discharged from the gas discharge port, and the metallic arsenic solid is discharged from the solid discharge port; as well as A carbon powder recovery component is arranged in the reduction reaction furnace, one end of the carbon powder recovery component is connected to the reactant output port, and the other end extends to the reactant input port. The carbon powder recovery component transports the carbon powder from the reactant output port to the reactant input port.

2. A metallic arsenic preparation system according to claim 1, characterized in that: The reduction reaction furnace comprises: A furnace body, wherein a conveying channel is arranged inside the furnace body, and the reactant input port and the reactant output port are respectively located at two ends of the furnace body; A base, disposed below the furnace body, and used to support the furnace body; Wherein, along the plane where the base is located 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 close to the reactant output port gradually decreases.

3. A metallic arsenic preparation system according to claim 2, characterized in that: The toner recovery component comprises: A support plate is arranged inside the furnace body and is located near one end of the reactant output port, and a vent is arranged on the support plate, and the vent is used for arsenic gas and carbon dioxide gas to pass through; The inner cylinder is a hollow cylindrical structure, one end of the inner cylinder is connected to the support plate, the other end of the inner cylinder extends to the reactant input port, the inner cylinder is provided with inner spiral blades, the inner cylinder is provided with a feed inlet near the outer side of the support plate, and the other end of the inner cylinder is provided with a discharge port; and A material plate is arranged on one side of the inner cylinder, and one side of the top end of the material plate is connected to the feed inlet. The material plate is used to transport the carbon powder at the reactant output port to the feed inlet.

4. A metallic arsenic preparation system according to claim 3, characterized in that: The support plate comprises: A fixing part, located in the middle of the support plate, one side of the fixing part is connected to one end of the inner cylinder; Rod components are provided in a plurality of groups, and the plurality of groups of rod components are arranged around the periphery of the fixing portion, and the rod components are fixedly connected to the furnace body; a baffle, located at one side of the material plate, and connected to the fixing portion, and used to limit the position of the carbon powder in the material plate; and A grid is located at the side of the fixing portion, the grid is connected to the rod component, and a plurality of ventilation holes are arranged on the grid.

5. A metallic arsenic preparation system according to claim 4, characterized in that: A material guide groove is arranged on one side of the material plate, the cross section of the material guide groove is an arc-shaped structure, and the opening direction of the material guide groove faces the rotation direction of the furnace body.

6. A metallic arsenic preparation system according to claim 2, characterized in that: The reduction reaction furnace also includes: A supporting wheel is arranged on the base, the supporting wheel is provided with a rolling ring, and the rolling ring is sleeved on the furnace body; and A mechanical jack is arranged on the base, the mechanical jack is located on the side of the supporting wheel away from the reactant output port, the mechanical jack is connected to one side of the supporting wheel, and the mechanical jack is used to adjust the inclination angle of the supporting wheel.

7. A metallic arsenic preparation system according to claim 1, characterized in that: It also includes a tail gas processor, which is connected to the gas exhaust port, and the tail gas processing gas is used to process and purify the discharged carbon dioxide gas.

8. A metallic arsenic preparation system according to claim 3, characterized in that: The motion trajectory of the support plate includes a loading position and a unloading position, wherein the loading position is below the unloading position. When the support plate is located at the loading position, the feed inlet is located above the material plate, and the carbon powder rolls along the furnace body to the material plate. When the support plate is located at the material lowering position, the material plate is located above the material inlet, and the carbon powder enters the material inlet from the material plate under the action of gravity.

9. A metallic arsenic preparation system according to claim 3, characterized in that: It also includes a preheating furnace, which is arranged between the conveyor belt loader and the reduction reaction furnace, and the preheating furnace preheats the arsenic trioxide solid.

10. The metal arsenic preparation system according to claim 5, characterized in that: The support plate is an integrated structure, and the material guide trough is formed between the baffle plate and the material plate.

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