A device and method for high-efficiency separation of tin-copper binary alloy by vacuum filtration

Abstract

The present application relates to a kind of tin copper binary alloy vacuum filtration high-efficiency separation equipment and method, belong to non-ferrous metallurgy field.The tin copper binary alloy vacuum filtration high-efficiency separation equipment, the top of the vacuum cavity is provided with the shell that can be disassembled up and down, hollow position in the top of the vacuum cavity and located inside the shell is equipped with filter cartridge, filter cartridge outside is uniformly equipped with heating body, the top of the shell is equipped with air hole, air hole is connected with argon bottle by stop valve pipeline, argon bottle is equipped with flow valve, filter cartridge bottom is uniformly equipped with filter hole, filter hole is directly below and located in the inside of the vacuum cavity and is equipped with tin liquid cylinder, the bottom of the vacuum cavity is connected with vacuum pump.The present application is pure physical method, and other substances will not be produced in the separation process;Clean and environmental protection, energy saving and high efficiency, simple process, easy operation, low cost, high metal recovery rate, process safety controllable.

Description

TECHNICAL FIELD

[0001] The application relates to a device and a method for efficiently separating a tin-copper binary alloy by vacuum filtration, and belongs to the technical field of pyrometallurgy of non-ferrous metals. BACKGROUND

[0002] The tin-copper binary alloy is mainly derived from waste printed circuit boards (PCBs). The metal content in waste circuit boards is high, and the resource utilization potential is great, so it has always been the focus of electronic waste recycling. Tin mainly exists in the form of solder in waste circuit boards, and copper mainly exists in the mother board of the circuit board. After the waste circuit board is crushed and disassembled and the metal is enriched, a tin-copper binary alloy is obtained. Since tin and copper account for a large proportion in the recycling of metals from waste circuit boards, it is necessary to separate and recycle these two metals.

[0003] At present, the main method for treating tin-copper binary alloys in the industry is electrolysis. According to the activity order of tin and copper, tin will enter the electrolyte, and finally be deposited on the cathode, while copper will be enriched in the anode mud. This method has the disadvantages of high energy consumption, difficult treatment of waste liquid, and low economy.

[0004] In the patent application with the publication number CN208532894U, a tin-copper separator is introduced. The patent does not specify the specific melting interval and the size of the separation basket mesh, which may cause a large amount of tin-copper compounds to pass through the separation basket mesh into the tin liquid, resulting in poor separation effect. In the patent application with the publication number CN108789945A, a copper-tin separation process for waste circuit boards is introduced. The process mentioned uses a copper-tin separator to heat and separate tin and copper. Due to the presence of copper-tin intermediate compounds, the separation effect is not ideal. In the patent application with the publication number CN108789945A, a method for separating copper and tin from waste circuit boards by flotation is introduced. The method mentioned finally uses hydrometallurgy, but cannot obtain copper and tin with high purity. In the patent application with the publication number CN106834744A, a method for separating tin and copper from tinned waste copper material is introduced. The method uses diesel to produce volatile matter under vacuum conditions to flush the tinned layer, and separates the tinned layer by centrifugal action. The method is carried out at high temperature and high speed, which is dangerous to some extent. In the patent application with the publication number CN112176188A, a method for deeply removing antimony and copper impurities in regenerated coarse tin is introduced. The method adds an antimony and copper removal agent to the molten tin liquid, which inevitably affects the purity of tin. Even if the antimony and copper removal agent is added, the quality of the coarse tin cannot reach the AA level Sn99.90. In the patent application with the publication number CN108277502A, a method for directly separating copper and tin alloy mixture by electrolysis is introduced. The method electrolyzes copper into electrolytic copper, and tin alloy falls into the electrolyte, which cannot completely recover the copper, and the electrolysis process has high energy consumption and is not economical. SUMMARY

[0005] In view of the problems and deficiencies of the prior art, the present application provides a device and method for high-efficiency separation of tin-copper binary alloy by vacuum filtration. The method is a pure physical method, and no other substances are generated during the separation process. It is clean, environmentally friendly, energy-efficient, simple, easy to operate, low in cost, high in metal recovery rate, and safe and controllable. The present application is realized by the following technical solutions.

[0006] A device for high-efficiency separation of tin-copper binary alloy by vacuum filtration, comprising a filter cartridge 1, a heating body 2, filter holes 3, lifting rings 4, a vacuum cavity 6, a tin liquid cylinder 7, an argon gas cylinder 8, a vacuum pump 9, an outer shell 11, air vents 12, flow valves 13, and stop valves.

[0007] The vacuum cavity 6 is provided with a detachable outer shell 11 at the top, and the filter cartridge 1 is arranged in the hollow position at the top of the vacuum cavity 6 and inside the outer shell 11. The heating body 2 is uniformly arranged outside the filter cartridge 1, the air vents 12 are arranged at the top of the outer shell 11, the argon gas cylinder 8 is connected to the air vents 12 through a stop valve pipeline, the flow valve 13 is arranged on the argon gas cylinder 8, the filter holes 3 are uniformly arranged at the bottom of the filter cartridge 1, the tin liquid cylinder 7 is arranged below the filter holes 3 and inside the vacuum cavity 6, and the vacuum pump 9 is connected to the bottom of the vacuum cavity 6.

[0008] The device for high-efficiency separation of tin-copper binary alloy by vacuum filtration has a processing capacity of 1t-10t.

[0009] The filter cartridge 1 has a diameter of 0.5m-1.5m, the filter holes have a diameter of 0.2-0.4mm, and the material is alumina.

[0010] The heating body 2 is controlled by a temperature controller 10.

[0011] The outer shell 11 is provided with a heat preservation layer 5, and the top of the outer shell 11 is provided with the lifting rings 4.

[0012] The heat preservation layer 5 has a thickness of 100mm-800mm.

[0013] The vacuum pump 9 is a direct-connection type double-stage rotary vane vacuum pump, and the pumping rate is 15-25L / s.

[0014] An application method of the device for high-efficiency separation of tin-copper binary alloy by vacuum filtration, comprising the following specific steps:

[0015] Step 1: First, lift the outer shell 11 using the lifting ring 4, place the tin-copper binary alloy in the filter cartridge 1, then place the outer shell 11 on top of the vacuum chamber 6 and secure it with hexagonal bolts for sealing. Close the shut-off valve, turn on the vacuum pump 9 to evacuate the vacuum chamber 6 and the inner shell 11 to a vacuum level of 1 Pa to 5 Pa. Then, open the shut-off valve and introduce argon gas into the vacuum chamber 6 and the inner shell 11, controlling the pressure to 0.5 MPa to 0.6 MPa. Continue to close the shut-off valve, turn on the vacuum pump 9 again to evacuate the vacuum, then open the shut-off valve and continue to introduce argon gas. Repeat the gas exchange process 4 to 6 times.

[0016] Step 2, Two-stage heating:

[0017] First stage of heating: Control the heating element 2 to heat the filter cartridge 1 at a rate of 8-10℃ / min, heat to 227-232℃, close the shut-off valve, turn on the vacuum pump 9 to evacuate to a vacuum level of 5-10Pa inside the vacuum chamber 6 and the outer shell 11, and keep warm for 0.5-1h.

[0018] Second stage of heating: Continue to control the heating element 2 to raise the temperature of filter cartridge 1 at a rate of 13-15℃ / min, raise the temperature to 400-415℃, and keep it warm for 1.5-2 hours;

[0019] During the two-stage heating process, the liquid low-copper crude tin in filter cartridge 1 will continuously flow out from filter cartridge 1 into tin liquid tank 7, and the crystalline metal that remains in filter cartridge 1 is the copper-rich phase, which can be sent to the copper smelting system for processing.

[0020] In step 1, the copper content of the tin-copper binary alloy is 5.0 wt% to 7.6 wt%.

[0021] The aforementioned molten tin cylinder 7 can be removed from the empty part at the top of the vacuum chamber 6 and placed inside.

[0022] The tin content in the aforementioned low-copper crude tin is 97.3wt% to 98.7wt%, and the copper content is 1.3wt% to 2.7wt%. The tin content in the copper-rich phase of filter cartridge 1 is 77.1wt% to 81.6wt%, and the copper content is 18.4wt% to 22.9wt%.

[0023] The metal recovery rates of tin and copper processed by this invention are 99%–99.5% and 98.5%–99.5%, respectively.

[0024] like Figure 2The principle of the present application is that tin melts at 232℃ due to its low melting point, and copper has a melting point of 1083℃ and is in solid state below 415℃. The reaction of copper and tin forms a eutectic structure of tin matrix phase and an intermetallic phase Cu6Sn5 at 227℃, and forms an intermetallic phase Cu3Sn when the temperature is raised to above 415℃ and the holding time is long, and the melting points of the two substances are both above 700℃. The tin must be completely melted, and the intermediate compound of tin and copper must not be melted, and the generated intermediate compound must be single, so the temperature must be controlled below 415℃, and the separation of tin and Cu6Sn5 is realized by physical filtration.

[0025] The purpose of the two-stage temperature rising is to preheat the furnace body so as to prevent the heating body from being broken due to too fast temperature rising, and to make the crude tin with high purity melt and flow out of the filter cartridge 1 in the one-stage holding process; and the purpose of vacuum extraction is to generate a pressure difference between the inside and outside of the filter cartridge 1, so as to promote the metal melt to flow out of the filter hole by overcoming the surface tension.

[0026] The present application has the following beneficial effects:

[0027] (1) The present method is a pure physical method, and no other substances are generated in the separation process; it is clean, environmentally friendly, energy-saving, efficient, simple in process, convenient in operation, low in cost, high in metal recovery rate, and safe and controllable in process.

[0028] (2) The present method provides a new way for removing copper in the refining process of crude tin, reduces the production cost, improves the working efficiency of crude tin refining, and effectively improves the resource utilization rate, thereby bringing huge economic benefits to enterprises. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a process flow chart of the present application;

[0030] Figure 2 is a tin-copper binary alloy phase diagram;

[0031] Figure 3 is an equipment diagram for high-efficiency separation of tin-copper binary alloy by vacuum extraction and filtration according to the present application.

[0032] In the figure: 1-filter cartridge, 2-heating body, 3-filter hole, 4-lifting ring, 5-heat preservation layer, 6-vacuum cavity, 7-tin liquid cylinder, 8-argon gas cylinder, 9-vacuum pump, 10-temperature controller, 11-outer shell, 12-vent hole, 13-flow valve. DETAILED DESCRIPTION

[0033] The present application will be further described below in combination with the drawings and specific embodiments.

[0034] Example 1

[0035] As Figure 3 shown, the tin copper binary alloy vacuum filtration high efficiency separation equipment, including filter cartridge 1, heating body 2, filter hole 3, lifting ring 4, vacuum cavity 6, tin liquid cylinder 7, argon bottle 8, vacuum pump 9, shell 11, vent hole 12, flow valve 13 and stop valve;

[0036] The top of the vacuum cavity 6 is provided with a detachable shell 11, and the hollow position of the top of the vacuum cavity 6 is provided with a filter cartridge 1 inside the shell 11. The outside of the filter cartridge 1 is uniformly provided with a heating body 2. The top of the shell 11 is provided with a vent hole 12. The vent hole 12 is connected to the argon bottle 8 through the stop valve pipeline. The argon bottle 8 is provided with a flow valve 13. The bottom of the filter cartridge 1 is uniformly provided with a filter hole 3. The filter hole 3 is located below the tin liquid cylinder 7 inside the vacuum cavity 6. The bottom of the vacuum cavity 6 is connected to the vacuum pump 9.

[0037] The tin copper binary alloy vacuum filtration high efficiency separation equipment has a processing capacity of 1t-10t. The diameter of the filter cartridge 1 is 0.5m, the diameter of the filter hole is 0.2m, and the material is alumina. The temperature of the heating body 2 is controlled by the temperature controller 10. The shell 11 is provided with a heat preservation layer 5, and the top of the shell 11 is provided with a lifting ring 4. The thickness of the heat preservation layer 5 is 100mm. The vacuum pump 9 is a direct connection type double stage rotary vane vacuum pump with a pumping rate of 15-25L / s. The heating body 2 is a graphite heating body.

[0038] As Figure 1 shown, the application method of the tin copper binary alloy vacuum filtration high efficiency separation equipment, the specific steps include:

[0039] Step 1, first, through the lifting ring 4, the shell 11 is lifted, 5t tin copper binary alloy (the content of copper in the tin copper binary alloy is 5.0wt%) is placed in the filter cartridge 1, then the shell 11 is placed on the top of the vacuum cavity 6 and fixed with hexagonal bolts for sealing treatment, the stop valve is closed, the vacuum pump 9 is opened to vacuumize the inside of the vacuum cavity 6 and the shell 11 to a vacuum degree of 5Pa, then the stop valve is opened, argon is introduced into the inside of the vacuum cavity 6 and the shell 11 to control the pressure to be 0.6Mpa; continue to close the stop valve, open the vacuum pump 9 again, then open the stop valve, continue to introduce argon, and the air exchange process is repeated 6 times;

[0040] Step 2, two-stage heating:

[0041] One-stage heating: control the heating body 2 to heat the filter cartridge 1 at a rate of 10℃ / min, heat to 232℃, close the stop valve, open the vacuum pump 9 to vacuumize the inside of the vacuum cavity 6 and the shell 11 to a vacuum degree of 10Pa, and keep warm for 1h;

[0042] Two-stage heating: continue to control the heating body 2 to heat the filter cartridge 1 at a rate of 13℃ / min, heat to 415℃, and keep warm for 2h.

[0043] During the two-stage heating process, the liquid low-copper crude tin in filter cartridge 1 will continuously flow out from filter cartridge 1 into tin liquid tank 7, and the crystalline metal that remains in filter cartridge 1 is the copper-rich phase, which can be sent to the copper smelting system for processing.

[0044] The tin content in the low-copper crude tin treated by this invention is 98.7 wt%, and the copper content is 1.3 wt%. The tin content in the copper-rich phase of filter cartridge 1 is 77.1 wt%, and the copper content is 22.9 wt%. The metal recovery rates of tin and copper are both 99.5%.

[0045] Comparative Examples

[0046] Tin smelting companies mostly use the melting and settling method to separate tin-copper binary alloys (the copper content in the tin-copper binary alloy is 5.0 wt%). The specific implementation method is to place the tin-copper binary alloy (the copper content in the tin-copper binary alloy is 5.0 wt%) in a melting furnace and heat it from room temperature to 400°C, and then let it stand for 1 to 2 hours. A large amount of copper will float to the surface of the melt in the form of crystals, and then the floating copper crystals are scooped out with an industrial spoon.

[0047] After comparison and treatment, the copper content in the molten tin after copper removal was about 3.2 wt%, and the tin content in the retrieved copper crystals was about 82.4 wt%. The copper content in the molten tin was still very high, the tin-copper separation effect was not obvious, and the high-temperature slag removal operation posed a safety hazard.

[0048] As can be seen from the above, the present invention has the characteristics of simple operation, clean and safe operation, high metal recovery rate, and obvious tin-copper separation effect.

[0049] Example 2

[0050] like Figure 3 As shown, the device for efficient vacuum filtration and separation of tin-copper binary alloy includes a filter cartridge 1, a heating element 2, a filter hole 3, a lifting ring 4, a vacuum chamber 6, a tin liquid cylinder 7, an argon cylinder 8, a vacuum pump 9, an outer shell 11, a vent 12, a flow valve 13, and a shut-off valve.

[0051] The vacuum chamber 6 has a detachable outer shell 11 at the top. A filter cartridge 1 is located inside the outer shell 11 in the hollow position at the top of the vacuum chamber 6. Heating elements 2 are evenly distributed on the outside of the filter cartridge 1. A vent hole 12 is provided at the top of the outer shell 11. An argon cylinder 8 is connected to the vent hole 12 through a shut-off valve pipe. A flow valve 13 is provided on the argon cylinder 8. Filter holes 3 are evenly distributed at the bottom of the filter cartridge 1. A molten tin cylinder 7 is located directly below the filter holes 3 and inside the vacuum chamber 6. A vacuum pump 9 is connected to the bottom of the vacuum chamber 6.

[0052] The equipment for efficient vacuum filtration and separation of tin-copper binary alloys has a processing capacity of 1t to 10t; the filter cartridge 1 has a diameter of 1.5m and a filter hole diameter of 0.4m, and is made of alumina; the heating element 2 is temperature-controlled by the temperature controller 10; the outer shell 11 is provided with a heat insulation layer 5, and the top of the outer shell 11 is provided with a hanging ring 4; the thickness of the heat insulation layer 5 is 800mm; the vacuum pump 9 is a direct-drive two-stage rotary vane vacuum pump with a pumping speed of 15 to 25L / s; the heating element 2 is a graphite heating element.

[0053] like Figure 1 As shown, the application method of this tin-copper binary alloy vacuum filtration high-efficiency separation equipment includes the following specific steps:

[0054] Step 1: First, lift the outer shell 11 using the lifting ring 4. Place 5t of tin-copper binary alloy (the copper content in the tin-copper binary alloy is 7.6wt%) in the filter cartridge 1. Then, place the outer shell 11 on top of the vacuum chamber 6 and fix it with hexagonal bolts for sealing. Close the shut-off valve and turn on the vacuum pump 9 to evacuate the vacuum chamber 6 and the inner shell 11 to a vacuum level of 1Pa. Then, open the shut-off valve and introduce argon gas into the vacuum chamber 6 and the inner shell 11, controlling the pressure to 0.5MPa. Continue to close the shut-off valve, turn on the vacuum pump 9 again to evacuate the vacuum, and then open the shut-off valve again to continue introducing argon gas. Repeat the gas exchange process 4 times.

[0055] Step 2, Two-stage heating:

[0056] First stage of heating: Control the heating element 2 to heat the filter cartridge 1 at a rate of 8℃ / min, heat to 227℃, close the shut-off valve, turn on the vacuum pump 9 to evacuate to a vacuum level of 5Pa inside the vacuum chamber 6 and the outer shell 11, and keep warm for 0.5h.

[0057] Second stage of heating: Continue to control the heating element 2 to raise the temperature of filter cartridge 1 at a rate of 15℃ / min, raise the temperature to 400℃, and keep it at that temperature for 1.5h.

[0058] During the two-stage heating process, the liquid low-copper crude tin in filter cartridge 1 will continuously flow out from filter cartridge 1 into tin liquid tank 7, and the crystalline metal that remains in filter cartridge 1 is the copper-rich phase, which can be sent to the copper smelting system for processing.

[0059] The tin content in the low-copper crude tin treated by this invention is 97.3 wt%, and the copper content is 2.7 wt%. The tin content in the copper-rich phase of filter cartridge 1 is 81.6 wt%, and the copper content is 18.4 wt%. The metal recovery rates of tin and copper are 99% and 98.5%, respectively.

[0060] Example 3

[0061] like Figure 3As shown, the device for efficient vacuum filtration and separation of tin-copper binary alloy includes a filter cartridge 1, a heating element 2, a filter hole 3, a lifting ring 4, a vacuum chamber 6, a tin liquid cylinder 7, an argon cylinder 8, a vacuum pump 9, an outer shell 11, a vent 12, a flow valve 13, and a shut-off valve.

[0062] The vacuum chamber 6 has a detachable outer shell 11 at the top. A filter cartridge 1 is located inside the outer shell 11 in the hollow position at the top of the vacuum chamber 6. Heating elements 2 are evenly distributed on the outside of the filter cartridge 1. A vent hole 12 is provided at the top of the outer shell 11. An argon cylinder 8 is connected to the vent hole 12 through a shut-off valve pipe. A flow valve 13 is provided on the argon cylinder 8. Filter holes 3 are evenly distributed at the bottom of the filter cartridge 1. A molten tin cylinder 7 is located directly below the filter holes 3 and inside the vacuum chamber 6. A vacuum pump 9 is connected to the bottom of the vacuum chamber 6.

[0063] The equipment for efficient vacuum filtration and separation of tin-copper binary alloys has a processing capacity of 1t to 10t; the filter cartridge 1 has a diameter of 1.2m and a filter hole diameter of 0.3m, and is made of alumina; the heating element 2 is temperature-controlled by a temperature controller 10; the outer shell 11 is provided with an insulation layer 5, and the top of the outer shell 11 is provided with a hanging ring 4; the insulation layer 5 is 600mm thick; the vacuum pump 9 is a direct-drive two-stage rotary vane vacuum pump with a pumping speed of 15 to 25L / s; the heating element 2 is a graphite heating element.

[0064] like Figure 1 As shown, the application method of this tin-copper binary alloy vacuum filtration high-efficiency separation equipment includes the following specific steps:

[0065] Step 1: First, lift the outer shell 11 using the lifting ring 4. Place 5t of tin-copper binary alloy (with a copper content of 6wt%) in the filter cartridge 1. Then, place the outer shell 11 on top of the vacuum chamber 6 and secure it with hexagonal bolts for sealing. Close the shut-off valve and turn on the vacuum pump 9 to evacuate the vacuum chamber 6 and the inner shell 11 to a vacuum level of 3Pa. Then, open the shut-off valve and introduce argon gas into the vacuum chamber 6 and the inner shell 11, controlling the pressure to 0.6MPa. Continue to close the shut-off valve, turn on the vacuum pump 9 again to evacuate the vacuum, and then open the shut-off valve again to continue introducing argon gas. Repeat the gas exchange process 5 times.

[0066] Step 2, Two-stage heating:

[0067] First stage of heating: Control the heating element 2 to heat the filter cartridge 1 at a rate of 9℃ / min, heat to 232℃, close the shut-off valve, turn on the vacuum pump 9 to evacuate to a vacuum level of 10Pa inside the vacuum chamber 6 and the outer shell 11, and keep warm for 0.8h.

[0068] Second stage of heating: Continue to control the heating element 2 to raise the temperature of filter cartridge 1 to 14℃ / min, raise the temperature to 410℃, and keep it at that temperature for 1.8h;

[0069] In the two-stage temperature rising process, the liquid low-copper crude tin in the filter cartridge 1 continuously flows out of the filter cartridge 1 into the tin liquid cylinder 7, and the crystal metal finally remaining in the filter cartridge 1 is a copper-rich phase, which can be sent to a copper smelting system for treatment.

[0070] The low-copper crude tin treated by the present application has a tin content of 98.5wt% and a copper content of 1.5wt%; the copper-rich phase in the filter cartridge 1 has a tin content of 79wt% and a copper content of 21wt%, and the metal recovery rates of tin and copper are both 99%.

[0071] The specific embodiments of the present application are described in detail above with reference to the drawings, but the present application is not limited to the above-described embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present application.

Claims

1. The application method of a device for high-efficiency separation of tin-copper binary alloy by vacuum filtration, characterized in that: the device for high-efficiency separation of tin-copper binary alloy by vacuum filtration comprises a filter cylinder (1), a heating body (2), filter holes (3), a lifting ring (4), a vacuum cavity (6), a tin liquid cylinder (7), an argon cylinder (8), a vacuum pump (9), an outer shell (11), a vent hole (12), a flow valve (13) and a stop valve; the top of the vacuum cavity (6) is provided with the outer shell (11) which can be disassembled up and down, the hollow position at the top of the vacuum cavity (6) and inside the outer shell (11) is provided with the filter cylinder (1), the outside of the filter cylinder (1) is uniformly provided with the heating body (2), the top of the outer shell (11) is provided with the vent hole (12), the vent hole (12) is connected with the argon cylinder (8) through the stop valve pipeline, the argon cylinder (8) is provided with the flow valve (13), the bottom of the filter cylinder (1) is uniformly provided with the filter hole (3), the filter hole (3) is below and inside the vacuum cavity (6) and provided with the tin liquid cylinder (7), and the bottom of the vacuum cavity (6) is connected with the vacuum pump (9). The specific steps include: Step 1: first, the outer shell (11) is lifted through the lifting ring (4), the tin-copper binary alloy is placed in the filter cylinder (1), the outer shell (11) is placed on the top of the vacuum cavity (6) and fixed with hexagonal bolts for sealing treatment, the stop valve is closed, the vacuum pump (9) is opened to vacuumize the inside of the vacuum cavity (6) and the outer shell (11) to a vacuum degree of 1 Pa to 5 Pa, then the stop valve is opened, argon is introduced into the inside of the vacuum cavity (6) and the outer shell (11) to control the pressure to be 0.5 Mpa to 0.6 Mpa, the stop valve is closed again, the vacuum pump (9) is opened again to vacuumize, then the stop valve is opened, argon is continuously introduced, and the air exchange process is repeated 4 to 6 times; Step 2: two-stage temperature rising: one-stage temperature rising: control the heating body (2) to make the temperature rising rate of the filter cylinder (1) be 8 to 10 ℃ / min, the temperature is raised to 227 to 232 ℃, the stop valve is closed, the vacuum pump (9) is opened to vacuumize the inside of the vacuum cavity (6) to a vacuum degree of 5 to 10 Pa, and the temperature is kept for 0.5 to 1 h; two-stage temperature rising: continue to control the heating body (2) to make the temperature rising rate of the filter cylinder (1) be 13 to 15 ℃ / min, the temperature is raised to 400 to 415 ℃, and the temperature keeping time is 1.5 to 2 h; In the two-stage temperature rising process, the liquid low-copper crude tin in the filter cylinder (1) continuously flows out of the filter cylinder (1) to the tin liquid cylinder (7), and the crystal-shaped metal finally remaining in the filter cylinder (1) is a copper-rich phase, which is sent to a copper smelting system for treatment. The processing capacity of the device for high-efficiency separation of tin-copper binary alloy by vacuum filtration is 1 t to 10 t. The diameter of the filter cylinder (1) is 0.5 m to 1.5 m, the diameter of the filter hole is 0.2 to 0.4 mm, and the material is alumina.

2. The application method of the device for high-efficiency separation of tin-copper binary alloy vacuum suction filtration according to claim 1, characterized in that: The heating body (2) is controlled by a temperature controller (10).

3. The application method of the device for high-efficiency separation of tin-copper binary alloy vacuum suction filtration according to claim 1, characterized in that: The outer shell (11) is provided with a heat preservation layer (5), and the top of the outer shell (11) is provided with the lifting ring (4).

4. The application method of the device for high-efficiency separation of tin-copper binary alloy vacuum suction filtration according to claim 1, characterized in that: The thickness of the heat preservation layer (5) is 100 mm to 800 mm.

5. The application method of the device for high-efficiency separation of tin-copper binary alloy vacuum suction filtration according to claim 1, characterized in that: The vacuum pump (9) is a direct-connection type double-stage rotary vane vacuum pump, and the air pumping rate is 15 to 25 L / s.

6. The application method of the device for high-efficiency separation of tin-copper binary alloy vacuum suction filtration according to claim 5, characterized in that: ​ 7. The application method of the device for high-efficiency separation of tin-copper binary alloy vacuum suction filtration according to claim 1, characterized in that: ​ 8. The application method of the device for high-efficiency separation of tin-copper binary alloy vacuum suction filtration according to claim 1, characterized in that: The copper content of the tin-copper binary alloy in step 1 is 5.0wt%-7.6wt%. The copper content of the tin-copper binary alloy in step 1 is 5.0wt%-7.6wt%.

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