Anode slime copper removal equipment and anode slime copper removal method

Abstract

The invention belongs to the technical field of surface treating agent production, and discloses anode slime copper removal equipment which comprises a kettle body, a stirring device and an aeration disc, the stirring device and the aeration disc are arranged in the kettle body, and the stirring device is used for stirring a mixture of anode slime and an acid solution in the kettle body so that the anode slime can be dispersed in the acid solution; the aeration disc is arranged below the stirring device, is connected with external oxygen supply equipment and is used for supplying oxygen into the kettle body; the aeration disc is provided with a plurality of first aeration holes and a plurality of second aeration holes; the first aeration holes supply oxygen towards the direction of the stirring device; by means of the design, the copper removal time of the anode slime can be shortened, the copper removal efficiency is improved, and in addition, the invention further discloses a copper removal method of the anode slime.

Description

Technical Field

[0001] The present application relates to the technical field of copper electrolytic refining, and in particular to an anode mud copper removal device and an anode mud copper removal method. Background Art

[0002] In the copper electrolytic refining process, during the anode mud leaching process, acid and anode mud are generally mixed to dissolve the copper in the anode mud in the acid while maintaining a certain temperature, so as to recover copper metal and improve the grade of precious metals such as gold and silver in the anode mud. Due to the different copper content in the anode mud, especially in the field of recycled copper electrolysis, the composition of the anode plates varies greatly, and the process adjustment is complicated, resulting in low leaching effect of simple anode mud, low copper leaching rate, unsatisfactory enrichment of gold and silver, long leaching time, and high cost of process heating and insulation.

[0003] Chinese patent application 201110423613.2 discloses a copper removal device and a copper removal method for anode mud of copper electrolysis; a first anode mud delivery pump installed outside the anode mud storage tank is connected to the inlet of the copper removal tank through a first anode mud delivery pipeline, the outlet of the copper removal tank is connected to the second anode mud delivery pump through a second anode mud delivery pipeline, and the outlet end of the second anode mud delivery pump is connected to a plate and frame filter press through a third anode mud delivery pipeline.

[0004] Copper removal method: copper anode mud is flushed into the anode mud storage tank by copper electrolyte, and then sent to the copper removal tank by the first anode mud delivery pump. Steam enters the copper removal tank jacket through the pipeline to heat it to 90-95℃, and air is introduced into the ventilation pipe to make the liquid surface churn. After leaching for 2-3 hours, the steam and air supply is stopped, and the copper anode mud is sent to the plate and frame filter press for flushing and filtration. The copper anode mud after copper removal is sent to the precious metal workshop for treatment; the filtrate returns to the copper electrolysis system;

[0005] Further combined with the attached drawings of the scheme, it can be seen that although the scheme sets a ventilation pipe in the copper removal tank and uses the ventilation pipe to make the liquid surface churn to provide sufficient oxygen to convert the copper in the anode mud into copper oxide and react with the acidic substances in the electrolyte to generate copper ions to achieve the purpose of copper removal, the scheme does not make too many designs on the gas introduction method, and only uses the ventilation pipe to directly introduce the gas below the liquid surface.

[0006] The problem to be solved by this scheme is: how to provide an anode mud copper removal device that can enhance the contact between the gas and the anode mud to be more complete. Summary of the invention

[0007] The purpose of the present application is to provide an anode mud copper removal device, which enables oxygen-containing gas to uniformly contact with the mixture of anode mud and acid solution from multiple positions through an aeration plate, thereby improving the oxidation efficiency of copper in the anode mud, and by adjusting the relative position between the aeration plate and the stirring device and adjusting the direction of the aeration holes of the aeration plate, we surprisingly found that when the aeration plate is below the stirring device and is provided with aeration holes facing the stirring device and facing the stirring device, the time for copper removal from the anode mud can be significantly shortened and the copper removal efficiency is improved.

[0008] To achieve the above-mentioned purpose, the present application discloses an anode mud copper removal device, comprising a kettle, a stirring device and an aeration plate arranged inside the kettle, wherein the stirring device is used to stir a mixture of anode mud and an acid solution in the kettle so that the anode mud is dispersed in the acid solution, the aeration plate is arranged below the stirring device, and the aeration plate is connected to an external oxygen supply device for supplying oxygen to the kettle; and the aeration plate is provided with a plurality of first aeration holes and a plurality of second aeration holes;

[0009] The first aeration hole supplies oxygen in a direction toward the stirring device;

[0010] The second aeration holes supply oxygen toward the bottom of the kettle body.

[0011] Preferably, the outer surface of the kettle body is provided with a jacket, and the jacket is provided with an air inlet and an air outlet. An external heating device circulates and supplies steam into the jacket through the air inlet and the air outlet to heat the kettle body.

[0012] Preferably, the kettle body is provided with a first feed port, a second feed port and a discharge port, the anode mud enters the kettle body through the first feed port, the acidic solution enters the kettle body through the second feed port, and the mixture of the anode mud and the acidic solution after copper removal is discharged through the discharge port.

[0013] Preferably, the external oxygen supply device supplies oxygen or a mixed gas containing oxygen into the kettle through an aeration disk.

[0014] Preferably, the stirring device comprises a driving unit and a stirring paddle, wherein the driving unit is used to drive the stirring paddle to rotate so as to stir the mixture of anode mud and acid solution in the kettle body and disperse the anode mud in the acid solution;

[0015] The driving unit is a motor.

[0016] In addition, the present application also discloses a method for removing copper from anode mud, which is based on the above-mentioned anode mud copper removal equipment. The anode mud and the acidic solution are first introduced into the kettle body, and then the stirring device is started to stir the mixture of the anode mud and the acidic solution in the kettle body so that the anode mud is dispersed in the acidic solution. At the same time, the aeration plate is started and oxygen is supplied toward the stirring device through the first aeration hole, and oxygen is supplied toward the bottom of the kettle body through the second aeration hole. When the copper ion content in the liquid phase substance in the kettle body no longer changes, the anode mud copper removal is completed.

[0017] Preferably, the method specifically comprises the following steps:

[0018] Step 1: introducing anode mud and acid solution into the kettle through the first feed inlet and the second feed inlet respectively;

[0019] Step 2: Turn on the external heating device, and circulate steam into the jacket on the outer surface of the kettle body through the air inlet and the air outlet to maintain the temperature inside the kettle body at 50-75°C;

[0020] Step 3: Start the driving unit to drive the stirring paddle to rotate at a frequency of 35 to 45 Hz to stir the mixture of anode mud and acid solution in the kettle body and disperse the anode mud in the acid solution;

[0021] At the same time, the aeration plate is started to supply oxygen through the first aeration hole toward the stirring device, and oxygen is supplied toward the bottom of the kettle through the second aeration hole. When the copper ion content in the liquid phase substance in the kettle no longer changes, the anode mud copper removal is completed;

[0022] The gas in the aeration plate is air, and the flow rate is 200-350m 3 / h.

[0023] Preferably, the mass ratio of the anode mud to the acid solution is 3:1.5-2;

[0024] The acidic solution is a sulfuric acid aqueous solution with a sulfuric acid concentration of 350 to 400 g / L.

[0025] Preferably, the acidic solution further contains an additive, and the additive is selected from at least one of sodium chlorate, potassium chlorate and magnesium chlorate.

[0026] Preferably, the copper content in the anode mud is 10-20wt%.

[0027] The beneficial effects of this application are:

[0028] The anode mud copper removal device provided in the present application enables oxygen-containing gas to uniformly contact the mixture of anode mud and acid solution from multiple positions through an aeration plate, thereby improving the oxidation efficiency of copper in the anode mud, and by adjusting the relative position between the aeration plate and the stirring device and adjusting the direction of the aeration holes of the aeration plate, we surprisingly found that when the aeration plate is below the stirring device and is provided with aeration holes facing the stirring device and facing the stirring device, the time for copper removal from the anode mud can be significantly shortened, and the copper removal efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a three-dimensional diagram of the kettle body of Example 1;

[0030] Figure 2 is a stereoscopic diagram of the stirring paddle of Example 1;

[0031] Figure 3 A bottom view of the aeration plate of Example 1;

[0032] Figure 4 This is a stereoscopic view of the stirring paddle of Comparative Example 3. DETAILED DESCRIPTION

[0033] The present invention will be described clearly and completely below in conjunction with the embodiments of the present invention. In the description of the present invention, it should be noted that, if no specific conditions are specified in the embodiments, the conditions are carried out according to conventional conditions or conditions recommended by the manufacturer. If the manufacturer of the reagents or instruments used is not specified, they are all conventional products that can be purchased commercially.

[0034] Example 1

[0035] refer to Figure 1-3 , an anode mud copper removal device, comprising a kettle body 1, a stirring device and an aeration plate 2 arranged inside the kettle body 1, wherein the stirring device is used to stir a mixture of anode mud and an acid solution in the kettle body 1 so that the anode mud is dispersed in the acid solution, the aeration plate 2 is arranged below the stirring device, and the aeration plate 2 is connected to an external oxygen supply device for supplying oxygen to the kettle body 1; and the aeration plate 2 is provided with a plurality of first aeration holes 3 and a plurality of second aeration holes 4;

[0036] The first aeration hole 3 supplies oxygen in the direction of the stirring device;

[0037] The second aeration holes 4 supply oxygen toward the stirring device.

[0038] It should be noted that, in actual use, the applicant does not impose too many restrictions on the number of the first aeration holes 3 and the second aeration holes 4. Specifically, in this embodiment, the number of the first aeration holes 3 and the second aeration holes 4 are both 50. More specifically, the apertures of the first aeration holes 3 and the second aeration holes 4 are both 1.8 cm.

[0039] Preferably, the kettle body 1 is provided with a first feed port 5, a second feed port 6 and a discharge port 7, the anode mud enters the kettle body 1 through the first feed port 5, the acidic solution enters the kettle body 1 through the second feed port 6, and the mixture of the anode mud and the acidic solution after copper removal is completed is discharged through the discharge port 7.

[0040] In actual use, the anode mud and the acid solution are first introduced into the kettle body 1 through the first feed port 5 and the second feed port 6, and then the stirring device and the aeration plate 2 are turned on at the same time. Of course, before turning on the aeration plate 2, the aeration plate 2 needs to be connected to the external oxygen supply device to ensure the smooth supply of oxygen-containing gas.

[0041] Subsequently, the copper in the anode mud first reacts with the introduced air to generate copper oxide, and then the copper oxide reacts with the acid solution to be converted into copper ions, thereby achieving the removal of copper ions in the anode mud;

[0042] Of course, the oxidation process of copper and oxygen often requires a high temperature environment. In actual operation, the operator can raise the acid solution to a higher temperature in advance to ensure the smooth oxidation of copper.

[0043] However, the applicant further recommends that a jacket be provided on the outer surface of the kettle body 1, wherein the jacket is provided with an air inlet and an air outlet, and an external heating device circulates steam into the jacket through the air inlet and the air outlet to heat the kettle body 1;

[0044] The reason is that the jacket and the external heating device can provide continuous heat to the kettle body 1, so that the anode mud inside the kettle body 1 is kept at a relatively stable temperature to convert the copper from solid state to ionic state;

[0045] And a more stable reaction temperature also means that the reaction is easier to control.

[0046] Further preferably, the external oxygen supply device supplies oxygen or a mixed gas containing oxygen into the kettle body 1 through the aeration plate 2; the applicant does not impose too many restrictions on the type of gas supplied. Specifically, in this embodiment, the gas used in this embodiment is air, and in view of the demand for oxygen in the copper oxidation process, the applicant does not recommend the use of a mixed gas with an oxygen concentration lower than the oxygen concentration in the air, that is, the oxygen concentration in the mixed gas should be greater than or equal to 20.59% (volume fraction);

[0047] More conventionally, the stirring device includes a driving unit and a stirring paddle 9 , wherein the driving unit is used to drive the stirring paddle 9 to rotate so as to stir the mixture of anode mud and acid solution in the kettle body 1 and disperse the anode mud in the acid solution; the driving unit is a motor 8 .

[0048] Example 2

[0049] A method for removing copper from anode mud is carried out based on the anode mud copper removal equipment described in Example 1, and specifically comprises the following steps:

[0050] Step 1: Anode mud (copper content is 13.85 wt % after testing) and acid solution are introduced into the kettle body 1 through the first feed port 5 and the second feed port 6 at a mass ratio of anode mud to acid solution of 3:1.5, and the acid solution is a sulfuric acid aqueous solution with a concentration of 350 g / L;

[0051] Step 2: Turn on the external heating device, and circulate steam into the jacket on the outer surface of the kettle body 1 through the air inlet and the air outlet to maintain the temperature inside the kettle body 1 at 55±5°C;

[0052] Step 3: Start the driving unit to drive the stirring paddle 9 to rotate at a frequency of 35 Hz to stir the mixture of anode mud and acid solution in the kettle body 1 and disperse the anode mud in the acid solution;

[0053] At the same time, connect the external oxygen supply equipment to the aeration plate 2 and 3 / h flow rate of air into the aeration plate 2, then start the aeration plate 2 and supply air through the first aeration hole 3 toward the stirring device, and supply air through the second aeration hole 4 toward the bottom of the kettle body 1. After the reaction is carried out for 325 minutes, when the copper ion content in the liquid phase material in the kettle body 1 no longer changes, the anode mud is decoppered, and then the copper content in the anode mud after decoppering is tested, and the copper content is 2.86wt%.

[0054] Example 3

[0055] A method for removing copper from anode mud is carried out based on the anode mud copper removal equipment described in Example 1, and specifically comprises the following steps:

[0056] Step 1: Anode mud (copper content is 14.03 wt % after testing) and acid solution are introduced into the kettle body 1 through the first feed port 5 and the second feed port 6 at a mass ratio of 3:2, and the acid solution is a sulfuric acid aqueous solution with a concentration of 400 g / L;

[0057] Step 2: Turn on the external heating device, and circulate steam into the jacket on the outer surface of the kettle body 1 through the air inlet and the air outlet to maintain the temperature inside the kettle body 1 at 75±5°C;

[0058] Step 3: Start the driving unit to drive the stirring paddle 9 to rotate at a frequency of 45 Hz to stir the mixture of anode mud and acid solution in the kettle body 1 and disperse the anode mud in the acid solution;

[0059] At the same time, connect the external oxygen supply equipment to the aeration plate 2 and3 / h flow rate into the aeration plate 2, then start the aeration plate 2 and supply air through the first aeration hole 3 toward the stirring device, and supply air through the second aeration hole 4 toward the bottom of the kettle body 1. After the reaction is carried out for 319 minutes, when the copper ion content in the liquid phase material in the kettle body 1 no longer changes, the anode mud is decoppered, and then the copper content in the anode mud after decoppering is tested, and the copper content is 2.79wt%.

[0060] Example 4

[0061] A method for removing copper from anode mud is carried out based on the anode mud copper removal equipment described in Example 1, and specifically comprises the following steps:

[0062] Step 1: Anode mud (copper content is 13.37 wt % after testing) and acid solution are introduced into the kettle body 1 through the first feed port 5 and the second feed port 6 at a mass ratio of anode mud to acid solution of 3:1.8, and the acid solution is a sulfuric acid aqueous solution with a concentration of 380 g / L;

[0063] Step 2: Turn on the external heating device, and circulate steam into the jacket on the outer surface of the kettle body 1 through the air inlet and the air outlet to maintain the temperature inside the kettle body 1 at 65±5°C;

[0064] Step 3: Start the driving unit to drive the stirring paddle 9 to rotate at a frequency of 40 Hz to stir the mixture of anode mud and acid solution in the kettle body 1 and disperse the anode mud in the acid solution;

[0065] At the same time, connect the external oxygen supply equipment to the aeration plate 2 and 3 Air is introduced into the aeration plate 2 at a flow rate of / h, then the aeration plate 2 is started and air is supplied toward the stirring device through the first aeration hole 3, and air is supplied toward the bottom of the kettle body 1 through the second aeration hole 4. After the reaction is carried out for 315 minutes, when the copper ion content in the liquid phase material in the kettle body 1 no longer changes, the anode mud is decoppered, and then the copper content in the anode mud after copper removal is tested, and the copper content is 2.64wt%.

[0066] Example 5

[0067] The method is substantially the same as Example 2, except that the acidic solution is a 350 g / L sulfuric acid aqueous solution further containing 3% by mass of potassium chlorate;

[0068] After testing, the copper content in the anode mud in step 1 is 14.15wt%;

[0069] After copper removal, the copper content in the anode mud was 2.69wt%;

[0070] The reaction took 298 min.

[0071] Example 6

[0072] The method is substantially the same as Example 2, except that the acidic solution is a 350 g / L sulfuric acid aqueous solution further containing 3% by mass of sodium chlorate;

[0073] After testing, the copper content in the anode mud in step 1 is 14.04wt%;

[0074] After copper removal, the copper content in the anode mud is 2.73wt%;

[0075] The reaction took 293 min.

[0076] Example 7

[0077] The method is substantially the same as Example 2, except that the acidic solution is a 350 g / L sulfuric acid aqueous solution further containing 1.5% by mass of sodium chlorate and 1.5% by mass of potassium chlorate;

[0078] After testing, the copper content in the anode mud in step 1 is 15.31wt%;

[0079] After copper removal, the copper content in the anode mud is 2.42wt%;

[0080] The reaction took 264 min.

[0081] Example 8

[0082] The method is substantially the same as Example 2, except that the acidic solution is a 350 g / L sulfuric acid aqueous solution further containing 3% by mass of potassium permanganate;

[0083] After testing, the copper content in the anode mud in step 1 is 14.02wt%;

[0084] After copper removal, the copper content in the anode mud is 2.67wt%;

[0085] The reaction took 323 min.

[0086] Example 9

[0087] The method is substantially the same as Example 2, except that the acidic solution is a 350 g / L aqueous sulfuric acid solution further containing 3% by mass of ferric chloride;

[0088] After testing, the copper content in the anode mud in step 1 is 14.54wt%;

[0089] After copper removal, the copper content in the anode mud is 2.65wt%;

[0090] The reaction took 328 min.

[0091] Comparative Example 1

[0092] The embodiment is basically the same as the embodiment 2, except that the aeration plate 2 of the anode mud copper removal equipment lacks the first aeration holes 3, and the number of the second aeration holes 4 is 100;

[0093] After testing, the copper content in the anode mud in step 1 is 14.96wt%;

[0094] After copper removal, the copper content in the anode mud is 2.88wt%;

[0095] The reaction took 426 min.

[0096] Comparative Example 2

[0097] The method is basically the same as Example 2, except that the aeration plate 2 of the anode mud copper removal equipment lacks the second aeration holes 4, and the number of the first aeration holes 3 is 100;

[0098] After testing, the copper content in the anode mud in step 1 is 14.58wt%;

[0099] After copper removal, the copper content in the anode mud is 2.65wt%;

[0100] The reaction took 430 min.

[0101] Comparative Example 3

[0102] refer to Figure 4 , which is basically the same as Example 2, except that the aeration plate 2 is arranged above the stirring device (in fact, above the blades of the stirring paddle);

[0103] After testing, the copper content in the anode mud in step 1 is 14.62wt%;

[0104] After copper removal, the copper content in the anode mud is 2.93wt%;

[0105] The reaction took 416 min.

[0106] Result analysis:

[0107] 1. It is calculated that the copper content in the anode mud in Example 2 decreases by 3.38wt% every 100 minutes on average;

[0108] Example 3: The copper content in the anode mud decreased by 3.52 wt% every 100 minutes on average;

[0109] Example 4: The copper content in the anode mud decreased by 3.41 wt% every 100 minutes on average;

[0110] Example 5: The copper content in the anode mud decreases by 3.85 wt% every 100 minutes on average;

[0111] Example 6: The copper content in the anode mud decreased by 3.86 wt% every 100 minutes on average;

[0112] Example 7: The copper content in the anode mud decreased by 4.88 wt% every 100 minutes on average;

[0113] Example 8: The copper content in the anode mud decreased by 3.51 wt% every 100 minutes on average;

[0114] Example 9: The copper content in the anode mud decreased by 3.63 wt% every 100 minutes on average;

[0115] Comparative Example 1 reduces the copper content in the anode mud by 2.84 wt% on average every 100 minutes;

[0116] Comparative Example 2 reduced the copper content in the anode mud by 2.77 wt% on average every 100 minutes;

[0117] Comparative Example 3 reduces the copper content in the anode mud by 2.81 wt% on average every 100 minutes;

[0118] 2. From the above calculation results, it can be seen that although the copper content reduction rate per unit time in Examples 2-4 fluctuates, the overall level fluctuates between about 3.4 and 3.5;

[0119] 3. Further observation of the calculation results of Examples 5-7 shows that when an oxidizing substance is added to the acidic solution, the copper content reduction rate per unit time of Examples 5-6 is improved relative to that of Example 2; and when the potassium chlorate used in Example 5 and the sodium chlorate used in Example 6 are used simultaneously in Example 7, the copper content reduction rate of Example 7 shows a significant improvement trend relative to that of Examples 5-6. It can be seen that when potassium chlorate and sodium chlorate are further mixed, the oxidation rate of copper is further promoted;

[0120] 4. Further observation of Examples 8-9 shows that when other oxidizing substances are used to replace chlorate, the rate of decrease of copper content per unit time in Examples 8-9 is significantly lower than that in any of Examples 5-7. It can be seen that chlorate has a stronger ability to oxidize copper in the system of this solution;

[0121] 5. By observing Example 2 and Comparative Example 1-2, it can be seen that the only difference between Comparative Example 1-2 and Example 2 is the position of the aeration holes of the aeration plate. However, the copper content decrease rate per unit time in Comparative Example 1-2 is significantly lower than that in Example 2. It can be seen that the design of the aeration holes in Example 2 is more conducive to the oxidation of copper.

[0122] 6. It can be seen from Example 2 and Comparative Example 3 that after changing the relative position of the aeration plate and the stirring paddle, the copper content decrease rate per unit time in Comparative Example 3 is significantly lower than that in Example 2. It can be seen that the setting of the relative position of the aeration plate and the stirring paddle in Example 2 is more conducive to the oxidation of copper and thus is conducive to improving the elimination efficiency of copper in the anode mud.

Claims

1. An anode mud copper removal device, comprising a kettle, a stirring device arranged inside the kettle and an aeration plate, wherein the stirring device is used to stir a mixture of anode mud and an acidic solution in the kettle to disperse the anode mud in the acidic solution, characterized in that: The aeration plate is arranged below the stirring device, and the aeration plate is connected to an external oxygen supply device for supplying oxygen to the kettle body; and the aeration plate is provided with a plurality of first aeration holes and a plurality of second aeration holes; The first aeration hole supplies oxygen in a direction toward the stirring device; The second aeration holes supply oxygen toward the bottom of the kettle body.

2. The anode mud copper removal equipment according to claim 1, characterized in that: The outer surface of the kettle body is provided with a jacket, and the jacket is provided with an air inlet and an air outlet. An external heating device circulates and supplies steam into the jacket through the air inlet and the air outlet to heat the kettle body.

3. The anode mud copper removal equipment according to claim 1, characterized in that: The kettle body is provided with a first feed port, a second feed port and a discharge port. Anode mud enters the kettle body through the first feed port, and the acidic solution enters the kettle body through the second feed port. The mixture of anode mud and acidic solution after copper removal is discharged through the discharge port.

4. The anode mud copper removal equipment according to claim 1, characterized in that: The external oxygen supply device supplies oxygen or a mixed gas containing oxygen into the kettle body through an aeration plate.

5. The anode mud copper removal equipment according to claim 1, characterized in that: The stirring device comprises a driving unit and a stirring paddle, wherein the driving unit is used to drive the stirring paddle to rotate so as to stir the mixture of anode mud and acid solution in the kettle body and disperse the anode mud in the acid solution; The driving unit is a motor.

6. A method for removing copper from anode mud, characterized in that: Based on the anode mud copper removal equipment described in any one of claims 1 to 5, the anode mud and the acid solution are first introduced into the kettle body, and then the stirring device is started to stir the mixture of the anode mud and the acid solution in the kettle body so that the anode mud is dispersed in the acid solution, and at the same time, the aeration plate is started and oxygen is supplied toward the stirring device through the first aeration hole, and oxygen is supplied toward the bottom of the kettle body through the second aeration hole. When the copper ion content in the liquid phase substance in the kettle body no longer changes, the anode mud copper removal is completed.

7. The method for removing copper from anode mud according to claim 6, characterized in that: The specific steps include: Step 1: introducing anode mud and acid solution into the kettle through the first feed inlet and the second feed inlet respectively; Step 2: Turn on the external heating device, and circulate steam into the jacket on the outer surface of the kettle body through the air inlet and the air outlet to maintain the temperature inside the kettle body at 50-75°C; Step 3: Start the driving unit to drive the stirring paddle to rotate at a frequency of 35 to 45 Hz to stir the mixture of anode mud and acid solution in the kettle body and disperse the anode mud in the acid solution; At the same time, the aeration plate is started to supply oxygen through the first aeration hole toward the stirring device, and oxygen is supplied toward the bottom of the kettle through the second aeration hole. When the copper ion content in the liquid phase substance in the kettle no longer changes, the anode mud copper removal is completed; The gas in the aeration plate is air, and the flow rate is 200-350m 3 / h.

8. The method for removing copper from anode mud according to claim 7, characterized in that: The mass ratio of the anode mud to the acid solution is 3:1.5-2; The acidic solution is a sulfuric acid aqueous solution with a sulfuric acid concentration of 350 to 400 g / L.

9. The method for removing copper from anode mud according to claim 8, characterized in that: The acidic solution further contains an additive, and the additive is selected from at least one of sodium chlorate, potassium chlorate, and magnesium chlorate.

10. The method for removing copper from anode mud according to claim 7, characterized in that: The copper content in the anode mud is 10-20wt%.

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