Efficient copper dissolving device and copper dissolving method

Abstract

The invention relates to the technical field of copper dissolving reaction devices, and discloses an efficient copper dissolving device and a copper dissolving method.The inner wall of the bottom of a copper dissolving tank is fixedly provided with a supporting grid, and the side face of the copper dissolving tank is provided with a circulating copper dissolving assembly. A jet device is arranged in an external circulating system of a copper dissolving tank, high-speed jet is achieved in a circulating pipeline of a sulfuric acid solution according to the Venturi principle, air in the external environment is sucked and fully fused with the sulfuric acid solution, the effect of rapidly dissolving oxygen is achieved, the dissolved oxygen amount in the sulfuric acid solution is increased, the utilization rate of oxygen is higher, and the service life of the copper dissolving tank is prolonged. The copper dissolving speed is higher, meanwhile, the requirement for dissolving a copper material with a larger size can be met, the sulfuric acid solution and air are mixed and emulsified, the oxygen utilization efficiency is improved, and therefore the demand for air is small, the total amount of air finally entering the copper dissolving tank is small, water taken away when the part of air is discharged is small, and the copper dissolving effect is good. Therefore, the water supplementing amount of the copper dissolving device is reduced, and the continuous efficiency of reaction is improved.

Description

Technical Field

[0001] The invention relates to the technical field of copper dissolving reaction devices, in particular to a high-efficiency copper dissolving device and a copper dissolving method. Background Art

[0002] Copper dissolving is to evenly distribute copper plates or copper wires in a copper dissolving container, and chemically react with sulfuric acid in sulfuric acid solution and oxygen in the air to dissolve the copper plates or copper wires into copper sulfate solution, and convert metallic copper into copper ions. The main equipment used includes copper dissolving tank, dirty liquid tank, clean liquid tank, diatomaceous earth filter, clean liquid filter, additive tank, fine filter, plate heat exchanger, circulating pump, etc.

[0003] At present, the copper dissolving methods in the prior art generally adopt immersion copper dissolving and spray copper dissolving. The immersion copper dissolving generally adopts air compressor to supply air. The purpose of air supply is to supply oxygen and stir the solution with air. Due to the large air bubbles, the oxygen in the air cannot be fully dissolved into the medium. The utilization rate of oxygen in the copper dissolving process is only about 3%, and the oxygen utilization efficiency is low. At the same time, the air takes away the heat of the solution, so that the temperature of the sulfuric acid solution drops; while the spray copper dissolving is to put the raw copper wire into the copper dissolving tower. The copper dissolving tower is a sieve plate below, and there is an exhaust pipe directly connected to the induced draft fan above, so the copper dissolving tower is always full of air, and the copper wire is always in contact with the air. The copper sulfate aqueous solution is sprayed on the copper wire from the top of the copper dissolving tower by a pump. Although the utilization efficiency of oxygen is improved, in order to improve the processing capacity, the amount of air needs to be increased. The evaporation loss of the solution exceeds the reaction heat, and the calorimeter water still needs to be supplemented, which increases the processing cost of water vapor. In view of this, we propose a high-efficiency copper dissolving device and copper dissolving method. Summary of the invention

[0004] The object of the present invention is to provide a high-efficiency copper dissolving device and a copper dissolving method to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: an efficient copper dissolving device, comprising a copper dissolving tank, a support grid is fixedly installed on the bottom inner wall of the copper dissolving tank, a feed port is opened on the top of the copper dissolving tank, and a circulating copper dissolving component is arranged on the side of the copper dissolving tank, and the circulating copper dissolving component comprises:

[0006] A liquid replenishing tube, the end of which is fixedly connected to the bottom side wall of the copper dissolving tank, an end of which is away from the copper dissolving tank is fixedly connected to an ejector, and an air intake control valve is fixedly installed on the side wall of the ejector;

[0007] A circulation pipe 1, wherein the end of the circulation pipe 1 is fixedly connected to an end of the ejector away from the infusion pipe, the end of the circulation pipe 1 away from the ejector is fixedly connected to a circulation pump, and the input end of the circulation pump is fixedly connected to a circulation pipe 2;

[0008] A gas-liquid separation tank, wherein one end of the circulation pipe 2 away from the circulation pump is fixedly connected to the bottom end of the gas-liquid separation tank, a water inlet pipe is fixedly installed on the side wall of the bottom end of the gas-liquid separation tank, the end of the water inlet pipe is fixedly connected to a spiral heat exchange pipe, the end of the spiral heat exchange pipe away from the water inlet pipe is fixedly connected to a water outlet pipe, an air guide pipe is fixedly connected between the copper dissolving tank and the gas-liquid separation tank, and an exhaust pipe is fixedly installed on the top of the gas-liquid separation tank.

[0009] Preferably, arc-shaped support members are provided at the bottom of the support grid, and the number of the arc-shaped support members is arranged in multiple groups, and the multiple groups of arc-shaped support members are evenly distributed in a circular array on the bottom surface of the support grid, so that there is a certain gap between the bottom surface of the support grid and the bottom inner wall of the copper-dissolving tank, which facilitates the filling of oxygen-containing acid liquid at the bottom of the copper-dissolving tank.

[0010] Preferably, the connection between the replenishment pipe and the copper dissolving tank is arranged below the supporting grid, so that the oxygen-containing acid solution introduced by the replenishment pipe through the circulation pump is input from the bottom of the copper dissolving tank to ensure the uniformity of the concentration of the acid solution at the bottom of the copper dissolving tank.

[0011] Preferably, the ejector includes a nozzle and an air inlet, wherein the air inlet is arranged on the side of the ejector and is fixedly connected to an air inlet control valve, and the air intake amount of the air inlet can be controlled by the air inlet control valve. Meanwhile, the nozzle is arranged on the top inner wall of the ejector. When the circulating pump inputs the circulating sulfuric acid solution into the top of the ejector, the sulfuric acid solution is sprayed downward at high speed through the nozzle arranged on the top inner wall of the ejector.

[0012] Preferably, the air duct is arranged near the top of the copper dissolving tank and the gas-liquid separation tank, so that the water vapor generated by the copper dissolving reaction in the copper dissolving tank and the sulfuric acid solution entrained with air rise and enter the interior of the gas-liquid separation tank through the air duct, and the ends of the water inlet pipe and the water outlet pipe away from the gas-liquid separation tank are fixedly connected to the output end and the input end of the external cooling water circulation equipment.

[0013] Preferably, a temperature sensor is provided inside the copper dissolving tank, and the temperature sensor is electrically connected to a controller of an external cooling water circulation device, and a temperature threshold of the reaction in the copper dissolving tank is set to 80° C. in the controller.

[0014] Preferably, the air duct is arranged below the water outlet pipe and the exhaust pipe in the vertical direction to prevent the mixed gas containing water vapor and sulfuric acid solution entrained with air flowing out of the air duct from being directly discharged from the inside of the exhaust pipe to the outside. The top of the exhaust pipe is connected to an external exhaust gas treatment device so that the exhaust gas generated by the copper dissolving operation can be discharged after treatment.

[0015] A copper dissolving method for a high-efficiency copper dissolving device, the copper dissolving method comprising the following steps:

[0016] S1. Add raw materials: open the feed port, place the copper material to be dissolved into the copper dissolving tank, and then add a sulfuric acid solution with a concentration of 200-250g / L;

[0017] S2. Start the equipment: close the feed inlet and start the circulation pump, external circulation cooling equipment and tail gas treatment equipment in sequence;

[0018] S3, copper dissolving reaction: copper dissolving operation is carried out by continuously dissolving oxygen in sulfuric acid solution through a circulation pump and an ejector;

[0019] S4. Shut down the equipment: After the copper material put into S1 is completely dissolved, shut down the circulation pumps in turn, shut down the external circulation cooling equipment after the temperature in the copper dissolving tank drops to room temperature, and finally shut down the exhaust gas treatment equipment.

[0020] Preferably, when the copper material is added in S1, the copper material is evenly spread on the support grid to avoid accumulation and excessive height of the copper material.

[0021] Preferably, when starting the equipment in S2, the air intake control valve is adjusted according to the volume of copper material added in S1. When a large volume of copper material is added, the air intake of the air intake control valve is increased, and when a smaller volume of copper material is added, the air intake of the air intake control valve is reduced, thereby controlling the amount of inhaled air and achieving the purpose of controlling the oxidation rate of the copper material.

[0022] Compared with the prior art, the present invention provides a highly efficient copper dissolving device and copper dissolving method, which have the following beneficial effects:

[0023] 1. The high-efficiency copper dissolving device and method are characterized in that an ejector is added to the external circulation system of the copper dissolving tank, and the Venturi principle is used to realize high-speed injection in the circulation pipeline of the sulfuric acid solution, so as to inhale the air in the external environment and fully merge it with the sulfuric acid solution, so as to realize the effect of rapid oxygen dissolution, increase the dissolved oxygen content in the sulfuric acid solution, and achieve higher oxygen utilization rate, faster copper dissolution speed, and can also meet the dissolution demand of a larger volume of copper material. In addition, the demand for air in the mixed emulsification process of the sulfuric acid solution and the air is less, so the total amount of air that finally enters the copper dissolving tank is less, and the water taken away by this part of the air when it is discharged is less, thereby reducing the water replenishment amount of the copper dissolving device and improving the continuous efficiency of the reaction.

[0024] 2. The high-efficiency copper dissolving device and method are provided with an air intake control valve at the air inlet of the ejector to control the air intake amount of the ejector during operation, so that the staff can adjust the air intake amount according to the volume of the copper material to be dissolved, thereby adjusting the dissolved oxygen content in the sulfuric acid solution after being mixed and emulsified by the ejector, thereby better controlling the dissolution rate of the copper material in the copper dissolving tank.

[0025] 3. The high-efficiency copper dissolving device and method are provided with a waste gas pipe at the top of the gas-liquid separator, which is matched with a spiral heat exchange pipe arranged in a spiral shape, so that the sulfuric acid solution, water vapor and waste gas vaporized in the copper dissolving tank can be fully condensed after entering the gas-liquid separator. After the waste gas is discharged from the waste gas pipe above, it will not enter the circulation system along with the sulfuric acid solution, so it will not cause cavitation to the circulation pump. At the same time, the air guide pipe is arranged at a position near the top of the copper dissolving tank, so that the copper slag generated by the copper dissolving reaction will not enter the circulation pump to cause wear and blockage.

[0026] 4. In the high-efficiency copper dissolving device and method, the entire copper dissolving tank only relies on the gas-liquid separation tank connected by the air duct to achieve internal temperature control, thereby reducing the temperature loss in the copper dissolving tank, so that the heat generated by the copper dissolving reaction will not be lost in large quantities. The temperature sensor set in the copper dissolving tank cooperates with the controller of the external cooling water circulation equipment to control the temperature in the copper dissolving tank to be below the threshold of 80°C, so that the temperature in the copper dissolving tank can be maintained in balance, without external heating, reducing energy loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0028] Figure 2 It is a schematic diagram of the cross-sectional structure of the copper dissolving tank and the gas-liquid separation tank of the present invention;

[0029] Figure 3 Schematic diagram of the copper dissolving process steps of the present invention.

[0030] In the figure: 1. copper dissolving tank; 2. supporting grid; 3. feed port; 4. circulating copper dissolving assembly; 401. liquid replenishing pipe; 402. ejector; 403. air intake control valve; 404. circulating pipe 1; 405. circulating pump; 406. circulating pipe 2; 407. gas-liquid separation tank; 408. water inlet pipe; 409. spiral heat exchange pipe; 410. water outlet pipe; 411. air guide pipe; 412. exhaust pipe. DETAILED DESCRIPTION

[0031] 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 ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] like Figure 1-Figure 3As shown, the present invention provides a technical solution: a high-efficiency copper dissolving device and a copper dissolving method, comprising a copper dissolving tank 1, a supporting grid 2 is fixedly installed on the bottom inner wall of the copper dissolving tank 1, a feed port 3 is opened on the top of the copper dissolving tank 1, and a circulating copper dissolving component 4 is arranged on the side of the copper dissolving tank 1. The circulating copper dissolving component 4 includes a liquid replenishing pipe 401, an ejector 402, an air intake control valve 403, a circulation pipe 1 404, a circulation pump 40, a circulation pipe 2 406, a gas-liquid separation tank 407, a water inlet pipe 408, a spiral heat exchange pipe 409, a water outlet pipe 410, an air guide pipe 411 and an exhaust pipe 412.

[0033] In one embodiment of the present invention, the end of the liquid replenishment tube 401 is fixedly connected to the bottom side wall of the copper dissolving tank 1, the end of the liquid replenishment tube 401 away from the copper dissolving tank 1 is fixedly connected to the ejector 402, the side wall of the ejector 402 is fixedly installed with an intake control valve 403, the end of the ejector 402 away from the liquid replenishment tube 401 is fixedly connected to the circulation tube 1 404, the end of the circulation tube 1 404 away from the ejector 402 is fixedly connected to the circulation pump 405, and the input end of the circulation pump 405 is fixedly connected to the circulation tube 2 404. 06. One end of the circulation pipe 2 406 away from the circulation pump 405 is fixedly connected to the gas-liquid separation tank 407, and a water inlet pipe 408 is fixedly installed on the side wall of the bottom end of the gas-liquid separation tank 407. The end of the water inlet pipe 408 is fixedly connected to a spiral heat exchange pipe 409, and the end of the spiral heat exchange pipe 409 away from the water inlet pipe 408 is fixedly connected to a water outlet pipe 410. An air guide pipe 411 is fixedly connected between the copper dissolving tank 1 and the gas-liquid separation tank 407, and an exhaust pipe 412 is fixedly installed on the top of the gas-liquid separation tank 407.

[0034] Furthermore, an arc-shaped support member is provided at the bottom of the support grid 2, and the number of the arc-shaped support members is provided in multiple groups, and the multiple groups of arc-shaped support members are evenly distributed on the bottom surface of the support grid 2 in a circular array, so that there is a certain gap between the bottom surface of the support grid 2 and the bottom inner wall of the copper-dissolving tank 1, which is convenient for the oxygen-containing acid liquid to be filled at the bottom of the copper-dissolving tank 1. At the same time, a plurality of square holes are provided on the inner wall of the support grid 2, so that the upper and lower spaces of the support grid 2 remain connected, so that the oxygen-containing acid liquid can better wrap the copper material on the support grid 2 and realize the copper dissolving operation on the copper material. In addition, a sealing cover is provided at the top of the feed port 3, and the sealing cover has a measure to prevent thermal expansion and contraction, so that the feed port 3 will not leak when the device as a whole is running, and the feed port 3 arranged at the top can more conveniently put the copper material into the copper-dissolving tank 1 at the beginning of the copper dissolving operation.

[0035] In addition, please refer to the instructions attached Figure 1-Figure 2The connection between the liquid replenishing pipe 401 and the copper dissolving tank 1 is arranged below the supporting grid 2, so that the oxygen-containing acid liquid introduced by the liquid replenishing pipe 401 through the circulating pump 405 is input from the bottom of the copper dissolving tank 1, thereby diffusing inside the copper dissolving tank 1 to ensure the concentration uniformity of the acid solution at the bottom of the copper dissolving tank 1, so as to better dissolve the copper material on the supporting grid 2. At the same time, the ejector 402 includes a nozzle and an air inlet, the air inlet is arranged on the side of the ejector 402, and the air inlet is fixedly connected to the air inlet control valve 403, and the air intake amount of the air inlet can be controlled by the air inlet control valve 403. At the same time, the nozzle is arranged on the ejector On the top inner wall of the ejector 402, when the circulating pump 405 inputs the circulating sulfuric acid solution to the top of the ejector 402, the sulfuric acid solution is sprayed downward at a high speed through the nozzle arranged on the top inner wall of the ejector 402. Due to the Venturi principle, low pressure is generated near the high-speed flowing sulfuric acid solution in the ejector 402, and under the action of atmospheric pressure, external air enters the ejector 402 through the air intake control valve 403 and the air intake port, and is fully mixed with the sulfuric acid solution, so that the dissolved oxygen content in the sulfuric acid solution tends to be saturated, thereby facilitating the subsequent entry of the sulfuric acid solution into the copper dissolving tank 1 for dissolving reaction with the copper material.

[0036] In an embodiment of the present invention, the circulation pipe 2 406 is fixedly connected to the inner wall of the bottom end of the gas-liquid separation tank 407, so that the sulfuric acid solution condensed in the gas-liquid separation tank 407 can smoothly enter the interior of the circulation pipe 2 406 under the influence of gravity and the action of the circulation pump 405, so as to realize the reuse of the sulfuric acid solution. At the same time, the interior of the gas-liquid separation tank 407 is hollow, so that the internal cavity of the gas-liquid separation tank 407 can form a space for the vaporized sulfuric acid solution to condense and reflux, and the air guide pipe 411 is arranged at a position near the top of the copper dissolving tank 1 and the gas-liquid separation tank 407, so that the water vapor generated by the copper dissolving reaction and the sulfuric acid solution entrained with air in the copper dissolving tank 1 can be recycled. After the liquid rises, it enters the interior of the gas-liquid separation tank 407 through the air guide pipe 411, and the ends of the water inlet pipe 408 and the water outlet pipe 410 away from the gas-liquid separation tank 407 are fixedly connected to the output end and the input end of the external cooling water circulation equipment. At the same time, since the spiral heat exchange pipe 409 is spirally arranged in the gas-liquid separation tank 407, there is enough heat exchange area in the gas-liquid separation tank 407 to quickly realize the condensation of the vaporized sulfuric acid solution, and there will be no residual solution attached to the surface of the spiral heat exchange pipe 409 itself, so that it is easier to fall and be re-input into the copper dissolving tank 1 through the circulation pipe 2 406 by the circulation pump 405 for reuse.

[0037] Specifically, a temperature sensor is provided inside the copper dissolving tank 1, and the temperature sensor is electrically connected to a controller of an external cooling water circulation device, and a temperature threshold of the reaction in the copper dissolving tank 1 is set at 80°C in the controller. When the reaction temperature in the copper dissolving tank 1 approaches the temperature threshold of 80°C, the external cooling water circulation device is accelerated to cool down, so as to achieve the effect of controlling the reaction temperature environment in the copper dissolving tank 1, so as to avoid the reaction environment temperature in the copper dissolving tank 1 being too high and affecting the natural volatilization of the sulfuric acid solution, thereby affecting the dissolution reaction of the copper material, and also to avoid the reaction temperature in the copper dissolving tank 1 being too high and causing corrosion and damage to the equipment. At the beginning of the start-up of the entire copper dissolving device, the copper dissolving tank 1 is heated by inputting hot water into the spiral heat exchange pipe 409, so as to cause its temperature to rise rapidly to close to 80°C, so as to avoid the temperature being too low at the beginning of copper dissolving and making it impossible for oxygen in the air to react with copper.

[0038] In the present invention, the air duct 411 is vertically arranged below the water outlet pipe 410 and the exhaust pipe 412 to prevent the mixed gas containing water vapor and sulfuric acid solution entrained with air flowing out of the air duct 411 from being directly discharged from the inside of the exhaust pipe 412 to the outside, and the vaporized sulfuric acid solution cannot be condensed, resulting in a certain loss of sulfuric acid solution. At the same time, the top of the exhaust pipe 412 is connected to an external exhaust gas treatment device so that the exhaust gas generated by the copper dissolving operation can be discharged after treatment to avoid causing harm to the surrounding environment of the production equipment.

[0039] In the actual operation of the present invention, firstly, the feed port 3 is opened, and the copper material to be dissolved is placed in the copper dissolving tank 1. When placing the copper material, it is spread on the supporting grid 2 as much as possible to reduce the accumulation. At the same time, a sulfuric acid solution with a concentration of 200 to 250 g / L is added to the copper dissolving tank 1, and then the feed port 3 is closed. The copper material in the copper dissolving tank 1 reacts with the oxygen in the air and the sulfuric acid solution, and the reaction formula is as follows:

[0040] 2Cu+O2+2H2SO4=2CuSO4+2H2O+221KJ;

[0041] At this time, the circulation pump 405 is started. The sulfuric acid solution, water vapor and exhaust gas vaporized by heat release in the copper dissolving tank 1 rise and enter the gas-liquid separation tank 407 through the air guide pipe 411. At this time, due to the cooling and condensing effect of the continuously flowing cooling water input through the water inlet pipe 408 and output through the water outlet pipe 410 in the circulating heat exchange pipe 409, the vaporized sulfuric acid solution and water vapor condense and are deposited at the bottom of the gas-liquid separation tank 407 under the action of gravity. They are drawn into the circulation pipe 2 406 by the action of the circulation pump 405, and finally input to the top of the ejector 402 through the circulation pipe 1 404, and then pass through the ejector 402. The nozzle arranged on the inner wall at the top of 402 sprays the sulfuric acid solution downward at high speed. Due to the Venturi principle, low pressure is generated near the high-speed flowing sulfuric acid solution in the ejector 402, and the external air enters the ejector 402 through the air inlet control valve 403 and the air inlet under the action of atmospheric pressure, and is fully mixed with the sulfuric acid solution to make the dissolved oxygen content in the sulfuric acid solution tend to be saturated. After that, the sulfuric acid solution with saturated dissolved oxygen is input into the copper dissolving tank 1 through the circulation pipe 404, and reacts with the copper material on the supporting grid 2 again, so as to realize the recycling of the sulfuric acid solution and reduce the loss of raw materials.

[0042] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. An efficient copper dissolving device, comprising a copper dissolving tank (1), a support grid (2) is fixedly mounted on the inner wall of the bottom of the copper dissolving tank (1), and a feed port (3) is opened on the top of the copper dissolving tank (1), characterized in that: A circulating copper dissolving component (4) is arranged on the side of the copper dissolving tank (1), and the circulating copper dissolving component (4) comprises: A liquid replenishing tube (401), the end of which is fixedly connected to the bottom side wall of the copper dissolving tank (1), one end of the liquid replenishing tube (401) away from the copper dissolving tank (1) is fixedly connected to an ejector (402), and an air intake control valve (403) is fixedly installed on the side wall of the ejector (402); A circulation pipe 1 (404), wherein the end of the circulation pipe 1 (404) is fixedly connected to an end of the ejector (402) away from the infusion pipe (401), the end of the circulation pipe 1 (404) away from the ejector (402) is fixedly connected to a circulation pump (405), and the input end of the circulation pump (405) is fixedly connected to a circulation pipe 2 (406); A gas-liquid separation tank (407), one end of the circulation pipe 2 (406) away from the circulation pump (405) is fixedly connected to the bottom end of the gas-liquid separation tank (407), a water inlet pipe (408) is fixedly installed on the side wall of the bottom end of the gas-liquid separation tank (407), the end of the water inlet pipe (408) is fixedly connected to a spiral heat exchange pipe (409), and the end of the spiral heat exchange pipe (409) away from the water inlet pipe (408) is fixedly connected to a water outlet pipe (410), an air guide pipe (411) is fixedly connected between the copper dissolving tank (1) and the gas-liquid separation tank (407), and an exhaust pipe (412) is fixedly installed at the top of the gas-liquid separation tank (407).

2. The high-efficiency copper dissolving device according to claim 1, characterized in that: The bottom of the support grid (2) is provided with arc-shaped support members, and the number of the arc-shaped support members is provided in multiple groups, and the multiple groups of arc-shaped support members are evenly distributed on the bottom surface of the support grid (2) in a circular array.

3. The high-efficiency copper dissolving device according to claim 1, characterized in that: The connection point between the liquid replenishing pipe (401) and the copper dissolving tank (1) is arranged below the supporting grid (2).

4. The high-efficiency copper dissolving device according to claim 1, characterized in that: The ejector (402) comprises a nozzle and an air inlet, wherein the air inlet is arranged on the side of the ejector (402) and is fixedly connected to an air inlet control valve (403). The air intake of the air inlet can be controlled by the air inlet control valve (403). Meanwhile, the nozzle is arranged on the top inner wall of the ejector (402).

5. The high-efficiency copper dissolving device according to claim 1, characterized in that: The air guide pipe (411) is arranged near the top of the copper dissolving tank (1) and the gas-liquid separation tank (407), and the ends of the water inlet pipe (408) and the water outlet pipe (410) away from the gas-liquid separation tank (407) are fixedly connected to the output end and the input end of the external cooling water circulation equipment.

6. A high-efficiency copper dissolving device according to claim 5, characterized in that: A temperature sensor is provided inside the copper dissolving tank (1), and the temperature sensor is electrically connected to a controller of an external cooling water circulation device, and a temperature threshold of the reaction in the copper dissolving tank (1) is set to 80° C. in the controller.

7. The high-efficiency copper dissolving device according to claim 1, characterized in that: The air guide pipe (411) is arranged below the water outlet pipe (410) and the exhaust pipe (412) in the vertical direction, and the top end of the exhaust pipe (412) is connected to an external exhaust gas treatment device.

8. A copper dissolving method according to any one of claims 1 to 7, characterized in that: The copper dissolving method comprises the following steps: S1. Adding raw materials: opening the feed port (3), placing the copper material to be dissolved into the copper dissolving tank (1), and then adding a sulfuric acid solution with a concentration of 200 to 250 g / L; S2, start the equipment: close the feed port (3) and start the circulation pump (405), the external circulation cooling equipment and the tail gas treatment equipment in sequence; S3, copper dissolving reaction: copper dissolving operation is performed by continuously using sulfuric acid solution to dissolve oxygen through a circulation pump (405) and an ejector (402); S4, closing equipment: after the copper material added in S1 is completely dissolved, the circulation pump (405) is closed in sequence, after the temperature in the copper dissolving tank (1) drops to room temperature, the external circulation cooling equipment is closed, and finally the tail gas treatment equipment is closed.

9. The copper dissolving method of the high-efficiency copper dissolving device according to claim 8, characterized in that: When the copper material is added in S1, it is ensured that the copper material is evenly spread on the support grid (2) to avoid accumulation and excessive height of the copper material.

10. The copper dissolving method of the high-efficiency copper dissolving device according to claim 8, characterized in that: When the equipment is started in S2, the air intake control valve (403) is adjusted according to the volume of the copper material added in S1. When a large volume of copper material is added, the air intake amount of the air intake control valve (403) is increased, and when a small volume of copper material is added, the air intake amount of the air intake control valve (403) is reduced.

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