Oxygen-enriched high-acid leaching method for reducing copper content of anode slime and special equipment

Abstract

The invention discloses an oxygen-enriched high-acid leaching method for reducing the copper content of anode slime and special equipment, and relates to the technical field of non-ferrous metallurgy. The oxygen-enriched high-acid leaching method for reducing the copper content of the anode mud comprises the following steps that firstly, compressed air is introduced into a pit liquid accumulation pit for purging, so that the anode mud fully reacts with electrolyte; 2, conveying the anode mud subjected to compressed air purging to a reaction kettle through a liquid accumulation pit pump; 3, the dissolved anode slime is conveyed to a thickener; and 4, after the reaction of the thickener, the anode slime is conveyed to an anode slime tank. According to the oxygen-enriched high-acid leaching method for reducing the copper content of the anode slime and the special equipment, the oxygen-enriched high-acid leaching process is combined with two times of compressed air introduction for reaction, so that the leaching rate of copper in the anode slime is remarkably improved, and the copper content of the anode slime is reduced; the reaction kettle adopts an insulating layer and a steam heating structure, so that the reaction temperature can be effectively maintained, and the energy consumption is reduced.

Description

Technical Field

[0001] This invention relates to the field of non-ferrous metal metallurgy technology, specifically to an oxygen-enriched high-acid leaching method and specialized equipment for reducing the copper content in anode mud. Background Technology

[0002] In the electrolytic refining process of copper anode plates, the treatment of anode mud is a crucial step.

[0003] Traditional anode slime treatment methods often result in a high copper content in the treated anode slime. If this copper is not recovered, the loss of copper will increase, leading to lower copper recovery rates, higher production costs, reduced efficiency, and hindering the comprehensive and effective utilization of resources. Furthermore, it negatively impacts the quality and marketability of the anode slime. Therefore, developing an efficient and environmentally friendly method and specialized equipment for reducing the copper content of anode slime is of significant practical importance.

[0004] Traditional methods for treating anode slime suffer from problems such as low copper leaching rate, high energy consumption, and severe equipment corrosion, resulting in high copper content in the anode slime. This not only wastes copper resources but also increases the difficulty and cost of subsequent precious metal recovery. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an oxygen-enriched, high-acid leaching method and specialized equipment for reducing the copper content in anode mud. This method solves the problems of low copper leaching rate, high energy consumption, and severe equipment corrosion associated with traditional anode mud treatment methods, which result in high copper content in the anode mud. This not only wastes copper resources but also increases the difficulty and cost of subsequent precious metal recovery.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an oxygen-enriched, high-acid leaching method and dedicated equipment for reducing the copper content in anode mud, comprising the following steps: Step 1: First, compressed air is introduced into the sump to purge the liquid accumulation pit, so that the anode mud and electrolyte can react fully; Step 2: The anode mud, after being blown away by compressed air, is transported to the reactor via a sump pump. Step 3: The dissolved anode mud is transported to the thickener; Step 4: After the reaction in the thickener, the anode mud is transported to the anode mud tank, where compressed air is introduced again to fully react. Step 5: Anode mud is transported from the anode mud tank to the anode mud filter press via the anode mud transfer pump, and then blown out to produce anode mud. In steps one to three above, a sump, a reaction vessel, and a thickener are used. The sump and thickener are connected to both sides of the reaction vessel. The sump includes: Pit body; An aeration pipe is located at the bottom of the pit. The aeration pipe is connected to a distribution pipe. A one-way air valve is connected to the top of the distribution pipe. The one-way air valve is inserted into the bottom of the pit and is used to introduce compressed air into the pit. The reactor is provided with an insulation layer and a vessel body. The vessel body is inserted into the inner side of the insulation layer and forms a jacket. The outer side of the insulation layer is connected to a steam inlet, a steam outlet, and a drain outlet. The steam inlet is used to introduce high-temperature steam into the jacket, and the drain outlet is used to discharge condensate from the jacket.

[0007] Preferably, the sump is also equipped with a mud pump, which is connected to a mud pipe for transporting the material in the sump to the reactor.

[0008] Preferably, the bottom of the insulation layer is connected to a first support leg that is evenly distributed in a ring, the inner side of the insulation layer is connected to a support block, the top of the support block is connected to a positioning ring, and the positioning ring is connected to the bottom of the vessel body for positioning the vessel body.

[0009] Preferably, a vent pipe is connected to the top of the vessel body for introducing high-pressure air into the vessel body, a thermometer is inserted into the top of the vessel body for detecting the temperature inside the vessel body, a positioning sleeve is connected to the top of the positioning sleeve, a first stirring motor is connected to the top of the positioning sleeve, a shaft is connected to the output end of the first stirring motor, and a stirring paddle is connected to the outside of the shaft for stirring the anode mud inside the vessel body.

[0010] Preferably, a limiting bracket is connected to the inner side of the vessel body, the limiting bracket is sleeved on the outer side of the shaft, and a baffle plate is connected to the inner side of the vessel body, the baffle plate being symmetrically arranged on both sides of the shaft.

[0011] Preferably, a pressure discharge pipe is provided on the inner side of the vessel body, and the pressure discharge pipe uses compressed air introduced into the vessel body through the vent pipe to discharge the fully dissolved anode mud.

[0012] Preferably, the top of the vessel is connected to a feed inlet, the feed inlet is provided with a sealing cover, a feed pipe is inserted into the inside of the sealing cover, and the feed pipe is connected to the mud conveying pipe.

[0013] Preferably, the thickener comprises: Conical groove; A truss is located at the top of a conical groove. A horizontal plate is connected to the truss. A second stirring motor is installed on the horizontal plate. The output end of the second stirring motor is connected to a linkage rod. The linkage rod is observed to be inserted into the inner side of the conical groove. A linkage arm is connected to the outer side of the linkage rod. A sludge scraper is connected to the bottom of the linkage arm. The sludge scraper fits against the bottom of the conical groove for stirring anode mud. A scraper plate is connected to the outer side of the linkage rod. Preferably, the bottom of the conical groove is connected to a discharge trough, which is sleeved on the outside of the scraper. A discharge pipe is connected to the discharge trough for discharging anode mud. A second support leg is connected to the bottom of the conical groove. An overflow trough is provided on the inner side of the conical groove for discharging excess liquid.

[0014] Preferably, the thickener is provided with a feed hopper, which is sleeved on the top of the linkage rod and connected to the truss. A feed square tube is provided on the outside of the feed hopper, and a conveying pipe is connected to the outside of the feed square tube. The conveying pipe is connected to the pressure discharge pipe.

[0015] This invention discloses an oxygen-enriched, high-acid leaching method and specialized equipment for reducing the copper content in anode mud, which has the following beneficial effects: By using an oxygen-enriched, high-acid leaching process, combined with two cycles of compressed air injection for reaction, the copper leaching rate in the anode mud was significantly improved, and the copper content in the anode mud was reduced. The reactor uses an insulation layer and a steam heating structure, which can effectively maintain the reaction temperature and reduce energy consumption. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the liquid accumulation pit of the present invention; Figure 3 This is a schematic diagram of the aeration pipe of the present invention; Figure 4 This is a schematic diagram of the structure of the reaction vessel of the present invention; Figure 5 This is a schematic cross-sectional view of the reaction vessel of the present invention; Figure 6 This is a schematic diagram of the thickener of the present invention; Figure 7 This is a cross-sectional structural diagram of the thickener of the present invention.

[0018] In the diagram: 1. Liquid accumulation pit; 11. Pit body; 12. Aeration pipe; 121. Air distribution pipe; 122. One-way air valve; 13. Sludge pump; 131. Sludge conveying pipe; 2. Reactor; 21. Insulation layer; 211. Steam inlet; 212. Steam outlet; 213. Drain outlet; 214. First support leg; 215. Positioning ring; 216. Support block; 22. Reactor body; 2221. Vent pipe; 222. Thermometer; 223. Positioning sleeve; 224. First stirring motor; 2241. Shaft; 2242. Stirring paddle; 225. Limiting bracket; 226. Baffle plate; 227. Pressure pipe; 228. Feed inlet; 2281. Feed pipe; 3. Thickener; 31. Conical trough; 311. Feed trough; 312. Discharge pipe; 313. Second support leg; 314. Overflow trough; 32. Truss; 321. Horizontal plate; 322. Second mixing motor; 323. Linkage rod; 324. Linkage arm; 325. Scraper; 326. Scraper; 33. Feed hopper; 331. Conveying pipe. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] This application provides an oxygen-enriched, high-acid leaching method and dedicated equipment for reducing the copper content in anode mud. This solves the problems of low copper leaching rate, high energy consumption, and severe equipment corrosion in traditional anode mud treatment methods, which result in high copper content in the anode mud. This not only wastes copper resources but also increases the difficulty and cost of subsequent precious metal recovery. By optimizing the leaching process and equipment structure, the copper leaching rate is improved, the copper content in the anode mud is reduced, and energy consumption and equipment corrosion are reduced.

[0021] This invention discloses an oxygen-enriched high-acid leaching method and dedicated equipment for reducing the copper content in anode mud.

[0022] Example 1: According to the appendix Figure 1-7As shown, the process includes the following steps: Step 1: First, compressed air is introduced into the sump 1 to purge the anode mud and electrolyte, allowing them to react fully; Step 2: The anode mud purged by compressed air is pumped from the sump 2 to the reactor 2; Step 3: The dissolved anode mud is pumped to the thickener 3; Step 4: After reaction in the thickener 3, the anode mud is pumped to the anode mud tank, where compressed air is introduced again for further reaction; Step 5: The anode mud from the tank is pumped to the anode mud filter press, where it is blown out to produce anode mud; Steps 1 to 3 above utilize the sump 1, reactor 2, and thickener 3, with the sump 1 and thickener 3 connected... On both sides of the reactor 2, the liquid accumulation pit 1 includes a pit body 11 and an aeration pipe 12. The aeration pipe 12 is located at the bottom of the pit body 11 and is connected to a gas distribution pipe 121. A one-way valve 122 is connected to the top of the gas distribution pipe 121. The one-way valve 122 is inserted into the bottom of the pit body 11 and is used to introduce compressed air into the pit body 11. The reactor 2 is provided with a heat insulation layer 21 and a vessel body 22. The vessel body 22 is inserted into the inner side of the heat insulation layer 21 and forms a jacket. The outer side of the heat insulation layer 21 is connected to a steam inlet 211, a steam outlet 212, and a drain outlet 213. The steam inlet 211 is used to introduce high-temperature steam into the jacket, and the drain outlet 213 is used to discharge the condensate in the jacket.

[0023] By employing an oxygen-enriched, high-acid leaching process combined with two rounds of compressed air injection during the reaction, the copper leaching rate from the anode mud was significantly improved, while the copper content in the anode mud was reduced. The reactor 2 utilizes an insulation layer 21 and a steam heating structure, which effectively maintains the reaction temperature and reduces energy consumption. Furthermore, the sump 1 is also equipped with a mud pump 13, which is connected to a mud pipe 131. The mud pipe 131 is used to transport the material in the sump to the reactor 2.

[0024] Furthermore, the bottom of the insulation layer 21 is connected to a first support leg 214 that is evenly distributed in a ring, the inner side of the insulation layer 21 is connected to a support block 216, the top of the support block 216 is connected to a positioning ring 215, and the positioning ring 215 is connected to the bottom of the vessel body 22 for positioning the vessel body 22.

[0025] Furthermore, the vessel body 22 is characterized by having a vent pipe 2221 connected to the top of the vessel body 22 for introducing high-pressure air into the vessel body 22, a thermometer 222 inserted into the top of the vessel body 22 for detecting the temperature inside the vessel body 22, a positioning sleeve 223 connected to the top of the vessel body 22, a first stirring motor 224 connected to the top of the positioning sleeve 223, a shaft 2241 connected to the output end of the first stirring motor 224, and a stirring paddle 2242 connected to the outside of the shaft 2241 for stirring the anode mud inside the vessel body 22.

[0026] Specifically disclosed, a limiting bracket 225 is connected to the inner side of the vessel body 22, and the limiting bracket 225 is sleeved on the outer side of the shaft 2241. A baffle plate 226 is connected to the inner side of the vessel body 22, and the baffle plate 226 is symmetrically arranged on both sides of the shaft 2241.

[0027] Specifically disclosed, a pressure discharge pipe 227 is provided inside the vessel body 22. The pressure discharge pipe 227 uses a vent pipe 2221 to introduce compressed air into the vessel body 22 to discharge fully dissolved anode mud.

[0028] Specifically disclosed, the top of the vessel body 22 is connected to a feed inlet 228, and a sealing cover is provided at the feed inlet 228. A feed pipe 2281 is inserted into the inside of the sealing cover, and the feed pipe 2281 is connected to the mud conveying pipe 131.

[0029] It should be emphasized that the thickener 3 includes a conical trough 31 and a truss 32. The truss 32 is located at the top of the conical trough 31. A horizontal plate 321 is connected to the truss 32. A second stirring motor 322 is installed on the horizontal plate 321. A linkage rod 323 is connected to the output end of the second stirring motor 322. The linkage rod 323 is inserted into the horizontal plate 321. A linkage arm 324 is connected to the outside of the linkage rod 323. A scraper 325 is connected to the bottom of the linkage arm 324. The scraper 325 fits against the bottom of the conical trough 31 to stir the anode mud. A scraper 326 is connected to the outside of the linkage rod 323.

[0030] It is particularly important to emphasize that the bottom of the conical groove 31 is connected to a discharge groove 311, which is sleeved on the outside of the scraper 326. A discharge pipe 312 is connected to the discharge groove 311 for discharging anode mud. The bottom of the conical groove 31 is connected to a second support leg 313. An overflow groove 314 is provided on the inner side of the conical groove 31 for discharging excess liquid.

[0031] Example 2: According to the appendix Figure 1-7As shown, the process includes the following steps: Step 1: First, compressed air is introduced into the sump 1 to purge the anode mud and electrolyte, allowing them to react fully; Step 2: The anode mud purged by compressed air is pumped from the sump 2 to the reactor 2; Step 3: The dissolved anode mud is pumped to the thickener 3; Step 4: After reaction in the thickener 3, the anode mud is pumped to the anode mud tank, where compressed air is introduced again for further reaction; Step 5: The anode mud from the tank is pumped to the anode mud filter press, where it is blown out to produce anode mud; Steps 1 to 3 above utilize the sump 1, reactor 2, and thickener 3, with the sump 1 and thickener 3 connected... On both sides of the reactor 2, the liquid accumulation pit 1 includes a pit body 11 and an aeration pipe 12. The aeration pipe 12 is located at the bottom of the pit body 11 and is connected to a gas distribution pipe 121. A one-way valve 122 is connected to the top of the gas distribution pipe 121. The one-way valve 122 is inserted into the bottom of the pit body 11 and is used to introduce compressed air into the pit body 11. The reactor 2 is provided with a heat insulation layer 21 and a vessel body 22. The vessel body 22 is inserted into the inner side of the heat insulation layer 21 and forms a jacket. The outer side of the heat insulation layer 21 is connected to a steam inlet 211, a steam outlet 212, and a drain outlet 213. The steam inlet 211 is used to introduce high-temperature steam into the jacket, and the drain outlet 213 is used to discharge the condensate in the jacket.

[0032] It should be emphasized that the thickener 3 is equipped with a feed hopper 33, which is sleeved on the top of the outside of the linkage rod 323 and connected to the truss 32. A feed square tube is provided on the outside of the feed hopper 33, and a conveying pipe 331 is connected to the outside of the feed square tube. The conveying pipe 331 is connected to the pressure pipe 227.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A method for reducing the copper content in anode mud through oxygen-enriched, high-acid leaching, characterized in that, Includes the following steps: Step 1: First, compressed air is introduced into the sump (1) to purge it, so that the anode mud and electrolyte can react fully; Step 2: The anode mud, which has been blown away by compressed air, is transported to the reactor (2) by the liquid sump pump. Step 3: The dissolved anode mud is transported to the thickener (3); Step 4: After the reaction in the thickener (3), the anode mud is transported to the anode mud tank, where compressed air is introduced again to fully react; Step 5: Anode mud is transported from the anode mud tank to the anode mud filter press via the anode mud transfer pump, and then blown out to produce anode mud. In steps one to three above, a sump (1), a reactor (2), and a thickener (3) are used. The sump (1) and the thickener (3) are connected to both sides of the reactor (2). The sump (1) includes: Pit body (11); An aeration pipe (12) is located at the bottom of the pit body (11). The aeration pipe (12) is connected to a distribution pipe (121). A one-way air valve (122) is connected to the top of the distribution pipe (121). The one-way air valve (122) is inserted into the bottom of the pit body (11) and is used to introduce compressed air into the pit body (11). The reactor (2) is provided with a heat insulation layer (21) and a vessel body (22). The vessel body (22) is inserted into the inner side of the heat insulation layer (21) and forms a jacket. The outer side of the heat insulation layer (21) is connected to a steam inlet (211), a steam outlet (212), and a drain outlet (213). The steam inlet (211) is used to introduce high-temperature steam into the jacket, and the drain outlet (213) is used to discharge the condensate in the jacket.

2. The oxygen-enriched high-acid leaching equipment for reducing copper content in anode mud according to claim 1, characterized in that, The sump (1) is also equipped with a mud pump (13), which is connected to a mud pipe (131) for transporting the material in the sump to the reactor (2).

3. The oxygen-enriched high-acid leaching equipment for reducing copper content in anode mud according to claim 1, characterized in that, The bottom of the insulation layer (21) is connected to a first support leg (214) that is evenly distributed in a ring. The inner side of the insulation layer (21) is connected to a support block (216). The top of the support block (216) is connected to a positioning ring (215). The positioning ring (215) is connected to the bottom of the vessel body (22) for positioning the vessel body (22).

4. The oxygen-enriched high-acid leaching equipment for reducing copper content in anode mud according to claim 1, characterized in that, The top of the vessel body (22) is connected to a vent pipe (2221) for introducing high-pressure air into the vessel body (22). A thermometer (222) is inserted into the top of the vessel body (22) for detecting the temperature inside the vessel body (22). A positioning sleeve (223) is connected to the top of the vessel body (223). A first stirring motor (224) is connected to the top of the positioning sleeve (223). A shaft (2241) is connected to the output end of the first stirring motor (224). A stirring paddle (2242) is connected to the outside of the shaft (2241). The stirring paddle (2242) is used to stir the anode mud inside the vessel body (22).

5. The oxygen-enriched high-acid leaching equipment for reducing copper content in anode mud according to claim 4, characterized in that, The inner side of the vessel body (22) is connected to a limiting bracket (225), which is sleeved on the outer side of the shaft (2241). The inner side of the vessel body (22) is connected to a baffle plate (226), which is symmetrically arranged on both sides of the shaft (2241).

6. The oxygen-enriched high-acid leaching equipment for reducing copper content in anode mud according to claim 4, characterized in that, The inner side of the vessel body (22) is provided with a pressure discharge pipe (227), which uses a vent pipe (2221) to input compressed air into the vessel body (22) to discharge fully dissolved anode mud.

7. The oxygen-enriched high-acid leaching equipment for reducing copper content in anode mud according to claim 1, characterized in that, The top of the vessel body (22) is connected to a feed inlet (228), and a sealing cover is provided on the feed inlet (228). A feed pipe (2281) is inserted into the inner side of the sealing cover, and the feed pipe (2281) is connected to the mud conveying pipe (131).

8. The oxygen-enriched high-acid leaching equipment for reducing copper content in anode mud according to claim 1, characterized in that, The thickener (3) includes: Conical groove (31); A truss (32) is located at the top of a conical groove (31). A horizontal plate (321) is connected to the truss (32). A second stirring motor (322) is installed on the horizontal plate (321). A linkage rod (323) is connected to the output end of the second stirring motor (322). The linkage rod (323) is inserted into the inner side of the conical groove (31) through the horizontal plate (321). A linkage arm (324) is connected to the outer side of the linkage rod (323). A scraper (325) is connected to the bottom of the linkage arm (324). The scraper (325) is in contact with the bottom of the conical groove (31) for stirring anode mud. A scraper (326) is connected to the outer side of the linkage rod (323).

9. A special oxygen-enriched high-acid leaching device for reducing copper content in anode mud according to claim 8, characterized in that, The bottom of the conical groove (31) is connected to a discharge trough (311), which is sleeved on the outside of the scraper (326). A discharge pipe (312) is connected to the discharge trough (311) for discharging anode mud. The bottom of the conical groove (31) is connected to a second support leg (313). An overflow trough (314) is provided on the inner side of the conical groove (31) for discharging excess liquid.

10. A special oxygen-enriched high-acid leaching device for reducing copper content in anode mud according to claim 6, characterized in that, The thickener (3) is provided with a feed hopper (33), which is sleeved on the top of the outside of the linkage rod (323) and connected to the truss (32). A feed square tube is provided on the outside of the feed hopper (33), and a conveying pipe (331) is connected to the outside of the feed square tube. The conveying pipe (331) is connected to the pressure pipe (227).

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