Copper material extraction production line and copper material separation and purification production process

Abstract

The invention relates to the field of copper material extraction, in particular to a copper material separation and purification production process for a copper material extraction production line, which comprises a multi-stage crushing unit, a feeding conveying unit positioned in a downstream process of the multi-stage crushing unit, and a pyrolysis conveying unit positioned in a downstream process of the feeding conveying unit which are arranged in sequence, the screening unit is located in the downstream process of the pyrolysis conveying unit, the dissolving and filtering unit is located in the downstream process of the screening unit, the transfer extraction unit is located in the downstream process of dissolving and filtering, and the circulation electrolysis unit is located in the downstream process of the transfer extraction unit; according to the copper material extraction production line, multiple copper material extraction production units are arranged, a set of complete copper material separation and purification process system is constructed, pyrolysis is adopted to replace traditional high-temperature smelting, energy consumption is effectively reduced, material grading treatment is achieved through the multi-stage crushing and screening technology, materials with high copper content are efficiently recycled, and the production efficiency is improved. The resource utilization rate is obviously improved, and the problem that the low-grade copper-containing waste is difficult to effectively recover is solved.

Description

Technical Field

[0001] The invention belongs to the field of copper material extraction, and in particular relates to a copper material extraction production line and a copper material separation and purification production process. Background Art

[0002] As an indispensable key metal in modern industry, copper plays an irreplaceable and important role. It is widely used in core sectors such as electronics, construction, transportation, and machinery manufacturing. In the electronics industry, copper, thanks to its excellent electrical conductivity, is a fundamental material for the manufacture of key components such as circuit boards and wires and cables. In the construction sector, copper's aesthetic and durability are utilized in piping systems, roofing materials, and decorative items, highlighting its unique value. In the transportation industry, copper plays a vital role in the electrical systems of automobiles and aircraft, as well as in the catenary systems of rail transit. In machinery manufacturing, copper alloys are highly valued for their exceptional strength and wear resistance and are widely used in the manufacture of various mechanical parts. Therefore, the efficient and environmentally friendly extraction and purification of copper from copper-containing waste or low-grade ores has become a key research topic currently attracting considerable attention.

[0003] In the existing technology, traditional copper extraction production lines have difficulty in effectively recovering copper from low-grade copper-containing waste during copper extraction and recovery, resulting in waste of resources; therefore, how to overcome the above-mentioned technical problems and defects has become a key issue that needs to be solved. Summary of the Invention

[0004] The purpose of the present invention is to overcome the defects described in the background technology, thereby realizing a copper material extraction production line to solve the problems in the prior art that traditional copper material extraction production lines are difficult to effectively recover copper from low-grade copper-containing waste and waste resources when performing copper material extraction and recovery.

[0005] To achieve the above-mentioned purpose of the invention, the technical solution of the present invention is: a copper material extraction production line, a multi-stage crushing unit, which is used to crush the base material of the copper material to be extracted.

[0006] The feeding and conveying unit located in the downstream process of the multi-stage crushing unit is used to convey the crushed substrate to the next process.

[0007] The pyrolysis and conveying unit located in the downstream process of the feeding and conveying unit is used to pyrolyze the substrate conveyed by the feeding and conveying unit and to convey it while pyrolyzing it.

[0008] The screening unit located in the downstream process of the pyrolysis conveying unit is used to screen the pyrolyzed substrate.

[0009] The dissolution and filtration unit located in the downstream process of the screening unit is used to dissolve the high-copper content substrate separated after screening and filter it after dissolution.

[0010] The transfer extraction unit located in the downstream process of dissolution and filtration is used to transfer the solution after dissolution with high copper content, and the transferred solution is extracted and purified.

[0011] The circulating electrolysis unit located in the downstream process of the transfer extraction unit is used to electrolyze the solution entering from the extraction cell. The electrolyzed solution re-enters the transfer extraction unit for purification and then enters the circulating electrolysis unit again for circulating electrolysis.

[0012] Specifically, it also includes a waste gas treatment unit, which is connected to the transfer extraction unit and is used to purify and neutralize gaseous substances formed by the solution in transfer.

[0013] In the above-mentioned copper material extraction production line, the multi-stage crushing unit includes at least one crusher, the feeding and conveying unit includes a feeding conveyor, the feeding end of the feeding conveyor is located at the discharging end of the crusher, and the pyrolysis conveying unit includes a pyrolysis rotary kiln and a discharging conveyor, the discharging end of the feeding conveyor is located at the feeding port of the pyrolysis rotary kiln, and the discharging port of the pyrolysis rotary kiln is connected to the feeding end of the discharging conveyor.

[0014] Specifically, the screening unit includes a drum screen, which is a drum screen with a multi-stage separation function, and the discharge end of the discharge conveyor is located at the feed end of the drum screen.

[0015] In the above-mentioned copper material extraction production line, the dissolution and filtration unit includes a dissolution tank and a filter press. The high-copper content substrate separated by the rotary screen is sent to the dissolution tank for dissolution, and the outlet of the dissolution tank is connected to the feed port of the filter press through a pipeline.

[0016] At the same time, the transfer extraction unit includes a transfer tank and an extraction pool. The solution filtered out by the filter press is sent to the transfer tank through a pipeline, and the transfer tank is connected to the extraction pool through a pipeline.

[0017] Specifically, the circulating electrolysis unit includes an electrolytic cell and an electrode assembly. The feed port of the electrolytic cell is connected to the extraction cell, and the electrode assembly is arranged on the electrolytic cell.

[0018] Preferably, the discharge port of the electrolytic cell is connected to the transfer tank, and the solution in the transfer tank and the solution in the electrolytic cell are circulated and transported through the extraction pool.

[0019] Preferably, the waste gas treatment unit includes an acid mist tower, which is connected to the extraction tank through a pipeline to absorb gaseous substances to purify and neutralize them.

[0020] The present invention also discloses a copper material separation and purification production process using the copper material extraction production line described above, which is characterized by comprising the following steps: Step 1: The base material of the copper material to be extracted is crushed in multiple stages by a crusher.

[0021] Step 2: The crushed substrate is transported to the pyrolysis conveying unit through a feed conveyor.

[0022] Step three: pyrolysis the substrate in the pyrolysis rotary kiln, and at the same time, convey the pyrolyzed material to the drum screen through the discharge conveyor.

[0023] Step 4: The pyrolyzed material is subjected to multi-stage separation by a rotary drum screen to separate the high-copper-content powder particles, low-copper-content residue and copper-free substrate after pyrolysis.

[0024] Step 5: The screened high-copper content powder particles are sent to a dissolution tank, and an acidic solution is added to dissolve them. The dissolved mixed solution is filtered through a filter press to separate the copper-containing solution and the residue.

[0025] Step 6: The filtered copper-containing solution is transported to a transfer tank for temporary storage, and then pumped into an extraction tank for extraction and purification. In the extraction tank, the organic solvent and the copper-containing solution are in countercurrent contact to achieve efficient extraction of copper ions.

[0026] Step 7: The extracted copper solution is sent to the electrolytic cell for electrolytic deposition through the electrode assembly. The electrolyzed solution returns to the transfer tank, mixes with the new extraction solution, and then enters the extraction tank again, forming a closed cycle.

[0027] Step 8: Set up an acid mist tower at the transfer extraction unit to purify and neutralize the gaseous substances generated during the extraction process.

[0028] In the above copper material separation and purification production process, the crusher in step 1 is a shear crusher, the crusher rotation speed is 200-400r / min, and the particle size detection standard after crushing is: ≥95% of the material particle size is ≤10mm.

[0029] The feeding conveyor in step 2 is a belt conveyor, the speed of the conveyor is 0.5-1.0 m / s, and the conveying distance is ≤15 m.

[0030] The pyrolysis temperature of the pyrolysis rotary kiln in step 3 is 450° C.-750° C., the pyrolysis time is 2-4 hours, the rotation speed of the pyrolysis rotary kiln is 1-3 r / min, the discharge conveyor speed is 0.3-1.0 m / s, the high-copper content powder particles after pyrolysis have a particle size of ≤1.5 mm, the low-copper content residue has a particle size of 1.5 mm < ≤4 mm, and the substrate without copper content has a particle size of 4 mm < ≤10 mm.

[0031] The rotation speed of the drum screen in step 4 is 10-20 r / min, and the mesh aperture increases step by step from the feed end to the discharge end, with the first-stage mesh aperture being 1.5 mm and the second-stage mesh aperture being 4 mm. The copper-free substrate is discharged from the discharge end of the drum screen.

[0032] The dissolution temperature of the dissolution tank in step 5 is 60-80° C., the acid concentration is 3-5 mol / L, and the dissolution time is 1-2 hours.

[0033] The filter press pressure in step 5 is 0.2-0.5 MPa, and the filtration accuracy is ≤50 μm.

[0034] The temperature of the transfer tank in step 6 is 15-35° C., the pH value of the extraction tank is 1.5-2.5, the concentration of the extractant is 10-15%, and the extraction time is 30-60 minutes.

[0035] The electrolytic cell temperature in step 7 is 40-50°C, and the current density is 200-300A / m 2 , the electrolysis time is 4-8 hours, and the electrode distance is 5-10 cm.

[0036] In the step eight, the acid mist tower adopts the alkali liquid spraying method and the activated carbon adsorption method to purify the gaseous substances generated in the neutralization and extraction process, wherein the pH value of the spray liquid is 10-12.

[0037] Compared with the prior art, the copper material extraction production line and copper material separation and purification production process of the present invention have at least the following beneficial effects: The copper extraction production line of the present invention constructs a complete copper separation and purification process system by arranging a multi-stage crushing unit, a pyrolysis and conveying unit, a screening unit, a dissolution and filtration unit, a transfer extraction unit, a circulating electrolysis unit, and an exhaust gas treatment unit. This system uses pyrolysis instead of traditional high-temperature smelting, effectively reducing energy consumption. Multi-stage crushing and screening technologies enable material classification, enabling efficient recovery of high-copper-content materials, significantly improving resource utilization and resolving the problem of the difficulty in effectively recovering low-grade copper-containing waste.

[0038] 2. The entire production line of the present invention realizes a closed-loop process from physical crushing to chemical dissolution, extraction and purification, electrolytic deposition to waste gas purification. The units are closely connected through automated transportation and control means to ensure the continuity and stability of the production process. By adding a circulating electrolysis unit, the electrolyzed solution can be returned to the transfer extraction unit for continued use, which greatly reduces wastewater discharge and improves the sustainability of the system. At the same time, the introduction of the waste gas treatment unit effectively purifies harmful gases such as acid mist generated during the extraction process, ensures the safety and cleanliness of the operating environment, and overcomes the serious environmental pollution problem in traditional processes. DETAILED DESCRIPTION

[0039] The copper material extraction production line of the present invention is described in more detail below through specific implementation methods.

[0040] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the present invention.

[0041] Example 1 This embodiment discloses a copper extraction production line. By incorporating a multi-stage crushing, screening, and separation system, as well as a closed-loop circulation system, this system addresses the difficulties encountered in effectively recovering copper from low-grade copper-containing scrap and the resulting waste of resources in conventional copper extraction lines. Details are provided below.

[0042] It primarily comprises a multi-stage crushing unit, which is used to crush the base material from which the copper material to be extracted is extracted. This multi-stage crushing increases the material's specific surface area, facilitating subsequent pyrolysis and dissolution reactions. Furthermore, the crushed material is easier to transport and evenly handle, improving overall efficiency.

[0043] The feed conveyor, located downstream of the multi-stage crushing unit, transports the crushed substrate to the next process. The substrate from which the copper is to be extracted is crushed in stages, making it suitable for subsequent processing. The crushed material is then conveyed to the next pyrolysis process, enabling continuous production and eliminating manual intervention.

[0044] The pyrolysis and conveying unit, located downstream of the feed and conveying unit, pyrolyzes the substrate delivered by the feed and conveying unit, simultaneously conveying it. The pyrolysis and conveying unit pyrolyzes the material during conveyance, decomposing non-metallic components and achieving initial separation, reducing the burden of subsequent chemical processing. This simultaneous pyrolysis and conveying process saves space and energy.

[0045] The screening unit, located downstream of the pyrolysis conveying unit, is used to screen the post-pyrolysis substrate. The screening unit separates the pyrolyzed material into components with high and low copper contents, achieving material classification and improving resource utilization. The high-copper content fraction is then further processed to reduce energy and reagent consumption.

[0046] The dissolution and filtration unit, located downstream of the screening unit, dissolves and filters the high-copper substrate separated after screening. The unit dissolves the high-copper substrate with acidic acid, followed by filtration to remove insoluble impurities. This converts the solid copper into an electrolytic copper ion solution, which is then filtered to remove impurities, providing a high-quality feedstock for subsequent extraction and electrolysis.

[0047] The transfer extraction unit, located downstream of the dissolution and filtration process, is used to transfer high-copper dissolved solutions for extraction and purification. The unit receives the copper solution after dissolution and filtration and performs organic phase extraction and purification to remove impurities such as iron and zinc. This effectively improves the purity of the copper solution, and the extraction process is selective and adaptable to different grades of raw materials. Furthermore, the transfer unit facilitates process control and buffer adjustment.

[0048] The circulating electrolysis unit located in the downstream process of the transfer extraction unit is used to electrolyze the solution entering from the extraction cell. The electrolyzed solution re-enters the transfer extraction unit for purification and then enters the circulating electrolysis unit again for circulating electrolysis.

[0049] The copper solution, after extraction and purification, is electro-deposited through a circulating electrolysis unit to obtain high-purity metallic copper. The solution is then returned to the transfer extraction unit for continued use. This allows for efficient copper recovery and purification, solution recycling, and reduced wastewater discharge.

[0050] In this embodiment, the multi-stage crushing unit includes at least one crusher, which is used to crush the base material of the copper material to be extracted to a size suitable for subsequent processing steps.

[0051] The feed conveying unit includes a feed conveyor, and the feed end of the feed conveyor is located at the discharge end of the crusher to ensure that the crushed material can be smoothly transmitted to the next process.

[0052] The pyrolysis conveyor unit includes a pyrolysis rotary kiln and a discharge conveyor. The discharge end of the feed conveyor is located at the feed inlet of the pyrolysis rotary kiln, and the discharge inlet of the pyrolysis rotary kiln is connected to the feed end of the discharge conveyor. The pyrolysis conveyor unit is used to heat and decompose the material during the pyrolysis process and simultaneously transport the pyrolyzed material to the next process via the discharge conveyor.

[0053] The screening unit includes a drum screen with multi-stage separation capabilities. The discharge end of the discharge conveyor is located at the feed end of the drum screen. The discharge conveyor feeds the pyrolyzed material into the drum screen for classification. The drum screen's different aperture designs enable graded screening of the pyrolyzed material, separating powdered particles with varying copper contents, low-copper residue, and copper-free substrate.

[0054] The dissolution and filtration unit includes a dissolution tank and a filter press. The high-copper-content substrate separated by the drum screen is fed to the dissolution tank for dissolution. The outlet of the dissolution tank is connected to the feed port of the filter press via a pipeline. An acidic solution is added to the dissolution tank to convert the high-copper-content substrate into a soluble copper ion solution, and insoluble impurities are removed by the filter press.

[0055] The transfer extraction unit includes a transfer tank and an extraction pool. The solution filtered from the filter press is piped into the transfer tank, which is connected to the extraction pool via a pipeline. The transfer tank temporarily stores the dissolved solution before transferring it to the extraction pool. Countercurrent contact between the organic solvent and the copper-containing solution achieves efficient extraction and purification of copper ions.

[0056] The circulating electrolysis unit includes an electrolytic cell and an electrode assembly. The feed port of the electrolytic cell is connected to the extraction cell, and the electrode assembly is mounted on the electrolytic cell. The discharge port of the electrolytic cell is connected to a transfer tank, and the solution in the transfer tank and the solution in the electrolytic cell are circulated through the extraction cell.

[0057] The copper ions in the solution are deposited as metallic copper through the electrolysis process. At the same time, the purified solution can be recycled, improving resource utilization and reducing wastewater discharge.

[0058] Example 2 The same points as the above embodiment are not repeated here, but the differences are as follows: In this embodiment, a waste gas treatment unit is further included. The waste gas treatment unit is connected to the transfer extraction unit and is used to purify and neutralize gaseous substances formed by the solution in transfer.

[0059] The gaseous pollutants generated during the transfer extraction process are purified and neutralized through the waste gas treatment unit to prevent them from being directly discharged into the atmosphere and causing environmental pollution.

[0060] Specifically, the waste gas treatment unit includes an acid mist tower, which is connected to an extraction tank through a pipeline to absorb gaseous substances to purify and neutralize them.

[0061] The acid mist tower is connected to the extraction tank via a pipeline and is used to absorb and purify gaseous substances generated during the extraction process. Alkali spraying and activated carbon adsorption are used to purify and neutralize the acid mist and other harmful gases released during the extraction process, ensuring that waste gas emissions meet emission standards and reduce environmental impact.

[0062] Example 3 The similarities with the above embodiments and their combinations are not repeated here, and the differences are as follows: This embodiment discloses a copper material separation and purification production process using the copper material extraction production line described in the above embodiment, characterized in that it includes the following steps: Step 1: The base material of the copper material to be extracted is crushed in multiple stages by a crusher. In this step, a shear crusher is used as the crusher, and the speed of the shear crusher is 200-400r / min. The particle size detection standard after crushing is: ≥95% of the material particle size is ≤10mm.

[0063] Step 2: The crushed substrate is conveyed to the pyrolysis conveying unit via a feed conveyor. In this step, the feed conveyor is a belt conveyor with a conveying speed of 0.5-1.0 m / s and a conveying distance of ≤15 m.

[0064] Step 3: Pyrolysis the substrate in a pyrolysis rotary kiln, and simultaneously convey the pyrolyzed material to a rotary drum screen via a discharge conveyor. In this step, the pyrolysis temperature of the pyrolysis rotary kiln is 450°C-750°C, the pyrolysis time is 2-4 hours, and the rotation speed of the pyrolysis rotary kiln is 1-3 rpm. The copper-containing material is pyrolyzed. The high-copper content powder particles after pyrolysis have a particle size of ≤1.5mm, the low-copper content residue has a particle size of 1.5mm < ≤4mm, and the copper-free substrate has a particle size of 4mm < ≤10mm.

[0065] The speed of the discharge conveyor is 0.3-1.0m / s.

[0066] Step 4: The pyrolyzed material is subjected to multi-stage separation using a rotary drum screen to separate high-copper powder particles, low-copper residue, and copper-free substrate. In this step, the rotary drum screen rotates at a speed of 10-20 r / min, and the mesh size of the rotary drum screen increases step by step from the feed end to the discharge end, with the first stage mesh size being 1.5 mm and the second stage mesh size being 4 mm. The copper-free substrate is discharged from the discharge end of the rotary drum screen.

[0067] Step 5: The screened high-copper powder particles are fed into a dissolution tank, where an acidic solution is added for dissolution. The dissolved mixture is filtered through a filter press to separate the copper solution and residue. In this step, the dissolution tank temperature is 60-80°C, the acid concentration is 3-5 mol / L, and the dissolution time is 1-2 hours.

[0068] In addition, the filter press pressure in this step is 0.2-0.5 MPa, and the filtration accuracy is ≤50 μm.

[0069] Step 6: The filtered copper-containing solution is transferred to a transfer tank for temporary storage and then pumped into an extraction tank for extraction and purification. In the extraction tank, the organic solvent and the copper-containing solution are in countercurrent contact, achieving efficient extraction of copper ions. In this embodiment, the transfer tank temperature is 15-35°C. At the same time, the pH value of the extraction tank is 1.5-2.5, the extraction agent concentration is 10-15%, and the extraction time is 30-60 minutes.

[0070] Step 7: The extracted copper solution is sent to the electrolytic cell for electrolytic deposition through the electrode assembly. The electrolytic solution returns to the transfer tank, mixes with the new extract and enters the extraction tank again, forming a closed cycle. In this step, the electrolytic cell temperature is 40-50 ° C, the current density is 200-300A / m 2, the electrolysis time is 4-8 hours, and the electrode distance is 5-10 cm.

[0071] Step 8: Set up an acid mist tower at the transfer extraction unit to purify and neutralize the gaseous substances generated during the extraction process. In this step, the acid mist tower uses alkaline solution spraying and activated carbon adsorption to purify and neutralize the gaseous substances generated during the extraction process, where the pH value of the spray liquid is 10-12.

[0072] It should be noted that the structures described in this specification are not fixed, unchanging implementations of the present device in practice. Generally, the components of the embodiments of the present invention described herein can be arranged and designed in a variety of different configurations.

[0073] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by persons of ordinary skill in the field to which the invention belongs. The use of "one" or "an" and other similar words in the specification and claims of this application does not necessarily indicate a quantitative limitation. "Include" or "comprising" and other similar words mean that the elements or parts preceding the word include the elements or parts listed after the word and their equivalents, without excluding other elements or parts. "Connect" or "connected" and other similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0074] The exemplary embodiments of the present invention are described in detail above with reference to preferred embodiments. However, it will be understood by those skilled in the art that, without departing from the concept of the present invention, various variations and modifications may be made to the above-mentioned specific embodiments, and various combinations of the various technical features and structures proposed in the present invention may be made without exceeding the scope of protection of the present invention.

Claims

1. A copper material extraction production line, characterized in that: include: The multi-stage crushing units are arranged in sequence to crush the base material of the copper material to be extracted; A feed conveying unit located in the downstream process of the multi-stage crushing unit is used to convey the crushed substrate to the next process; The pyrolysis and conveying unit is located in the downstream process of the feeding and conveying unit, and is used to pyrolyze the substrate conveyed by the feeding and conveying unit and convey it at the same time; The screening unit located in the downstream process of the pyrolysis conveying unit is used to screen the pyrolyzed substrate; The dissolution and filtration unit located in the downstream process of the screening unit is used to dissolve the high-copper content substrate separated after screening and filter it after dissolution; The transfer extraction unit located in the downstream process of dissolution and filtration is used to transfer the solution after high copper content is dissolved, and the transferred solution is extracted and purified; The circulating electrolysis unit located in the downstream process of the transfer extraction unit is used to electrolyze the solution entering from the extraction cell. The electrolyzed solution re-enters the transfer extraction unit for purification and then enters the circulating electrolysis unit again for circulating electrolysis.

2. The copper material extraction production line according to claim 1, characterized in that: It also includes a waste gas treatment unit, which is connected to the transfer extraction unit and is used to purify and neutralize gaseous substances formed by the solution in transfer.

3. The copper material extraction production line according to claim 2, characterized in that: The multi-stage crushing unit includes at least one crusher, the feeding and conveying unit includes a feeding conveyor, the feeding end of the feeding conveyor is located at the discharging end of the crusher, the pyrolysis conveying unit includes a pyrolysis rotary kiln and a discharging conveyor, the discharging end of the feeding conveyor is located at the feeding port of the pyrolysis rotary kiln, and the discharging port of the pyrolysis rotary kiln is connected to the feeding end of the discharging conveyor; The screening unit includes a drum screen having a multi-stage separation function, and the discharge end of the discharge conveyor is located at the feed end of the drum screen.

4. The copper material extraction production line according to claim 3, characterized in that: The dissolution and filtration unit includes a dissolution tank and a filter press. The substrate with high copper content separated by the rotary screen is sent to the dissolution tank for dissolution. The outlet of the dissolution tank is connected to the feed port of the filter press through a pipeline. The transfer extraction unit includes a transfer tank and an extraction pool. The solution filtered out of the filter press is sent to the transfer tank through a pipeline. The transfer tank is connected to the extraction pool through a pipeline. The circulating electrolysis unit includes an electrolytic cell and an electrode assembly, wherein the feed port of the electrolytic cell is connected to the extraction cell, and the electrode assembly is arranged on the electrolytic cell; The discharge port of the electrolytic cell is connected to the transfer tank, and the solution in the transfer tank and the solution in the electrolytic cell are circulated and transported through the extraction pool; The waste gas treatment unit includes an acid mist tower, which is connected to an extraction tank through a pipeline to absorb gaseous substances and purify and neutralize them.

5. A copper material separation and purification production process using the copper material extraction production line according to any one of claims 1 to 4, characterized in that: The steps include: Step 1: The base material of the copper material to be extracted is crushed in multiple stages by a crusher; Step 2: The crushed substrate is transported to the pyrolysis conveying unit through the feed conveyor; Step three: pyrolysis the substrate in the pyrolysis rotary kiln, and at the same time, the pyrolysis material is transported to the drum screen through the discharge conveyor; Step 4: The pyrolyzed material is subjected to multi-stage separation by a rotary drum screen to separate the high-copper content powder particles, low-copper content residue and copper-free substrate after pyrolysis; Step 5: The screened high-copper content powder particles are sent to a dissolution tank, an acidic solution is added to dissolve them, and the dissolved mixture is filtered through a filter press to separate the copper-containing solution and the residue; Step six: The filtered copper-containing solution is transported to a transfer tank for temporary storage, and then pumped into an extraction tank for extraction and purification. In the extraction tank, the organic solvent and the copper-containing solution are in countercurrent contact to achieve efficient extraction of copper ions; Step 7: The extracted copper solution is fed into the electrolytic cell and electrolytically deposited through the electrode assembly. The electrolytic solution returns to the transfer tank, is mixed with the new extract, and then enters the extraction tank again, forming a closed cycle. Step 8: Set up an acid mist tower at the transfer extraction unit to purify and neutralize the gaseous substances generated during the extraction process.

6. The copper material separation and purification production process according to claim 5, characterized in that: The crusher in step 1 is a shear crusher, the speed of the crusher is 200-400 r / min, and the particle size detection standard after crushing is: ≥95% of the material particle size is ≤10 mm; The feeding conveyor in step 2 is a belt conveyor, the speed of the conveyor is 0.5-1.0 m / s, and the conveying distance is ≤15 m.

7. The copper material separation and purification production process according to claim 5, characterized in that: The pyrolysis temperature of the pyrolysis rotary kiln in step 3 is 450° C.-750° C., the pyrolysis time is 2-4 hours, the rotation speed of the pyrolysis rotary kiln is 1-3 r / min, the speed of the discharge conveyor is 0.3-1.0 m / s, the high-copper content powder particles after pyrolysis have a particle size of ≤1.5 mm, the low-copper content residue has a particle size of 1.5 mm < ≤4 mm, and the copper-free substrate has a particle size of 4 mm < ≤10 mm; The rotation speed of the drum screen in step 4 is 10-20 r / min, and the mesh aperture increases step by step from the feed end to the discharge end, with the first-stage mesh aperture being 1.5 mm and the second-stage mesh aperture being 4 mm. The copper-free substrate is discharged from the discharge end of the drum screen.

8. The copper material separation and purification production process according to claim 5, characterized in that: The dissolution temperature of the dissolution tank in step 5 is 60-80°C, the acid concentration is 3-5 mol / L, and the dissolution time is 1-2 hours; The filter press pressure in step 5 is 0.2-0.5 MPa, and the filtration accuracy is ≤50 μm; The temperature of the transfer tank in step 6 is 15-35° C., the pH value of the extraction tank is 1.5-2.5, the concentration of the extractant is 10-15%, and the extraction time is 30-60 minutes.

9. The copper material separation and purification production process according to claim 5, characterized in that: The electrolytic cell temperature in step 7 is 40-50°C, and the current density is 200-300A / m 2 , the electrolysis time is 4-8 hours, and the electrode distance is 5-10 cm.

10. The copper material separation and purification production process according to claim 5, characterized in that: In the step eight, the acid mist tower adopts the alkali liquid spraying method and the activated carbon adsorption method to purify the gaseous substances generated in the neutralization and extraction process, wherein the pH value of the spray liquid is 10-12.