阅读说明：本技术 一种铜阳极板洗渣的处理方法 (Treatment method of copper anode plate washing slag ) 是由 魏栋 董广刚 刘士祥 李先和 胥林朋 李纪云 于 2020-12-07 设计创作，主要内容包括：本发明涉及阳极板洗渣的处理技术领域,尤其涉及一种铜阳极板洗渣的处理方法。所述处理方法包括：A)将铜阳极板洗渣、硫酸溶液和氧化剂混合,进行酸浸,得到酸浸液；B)将所述酸浸液与阳离子聚丙烯酰胺溶液混合,进行絮凝沉淀,得到酸浸清液和酸浸渣；C)所述酸浸渣经过水洗后调浆,筛分后,得到硫酸钡；将所述酸浸清液进行通电电积,得到高纯阴极铜。本发明解决了阳极板浇铸水洗渣综合回收有价元素的问题,创造性的提出了氧化酸浸处理水洗渣工艺方案,避免了传统水洗渣返炉处理问题,而且与其它湿法处理工艺不同,工艺简单,流程短,设备要求低,提高了产品的附加值。(The invention relates to the technical field of treatment of anode plate washing slag, in particular to a treatment method of copper anode plate washing slag. The processing method comprises the following steps: A) mixing the copper anode plate washing residue, a sulfuric acid solution and an oxidant, and performing acid leaching to obtain a pickle liquor; B) mixing the pickle liquor with a cationic polyacrylamide solution, and performing flocculation precipitation to obtain pickle liquor and pickle slag; C) washing the acid leaching residue with water, mixing the pulp, and screening to obtain barium sulfate; and electrifying and electrodepositing the acid leaching clear solution to obtain the high-purity cathode copper. The invention solves the problem of comprehensive recovery of valuable elements from anode plate casting washing slag, creatively provides a technical scheme for treating the washing slag by oxidizing acid leaching, avoids the problem of furnace return treatment of the traditional washing slag, is different from other wet treatment processes, and has the advantages of simple process, short flow, low equipment requirement and increased added value of products.)

1. A treatment method of copper anode plate washing slag comprises the following steps:

A) mixing the copper anode plate washing residue, a sulfuric acid solution and an oxidant, and performing acid leaching to obtain a pickle liquor;

B) mixing the pickle liquor with a cationic polyacrylamide solution, and performing flocculation precipitation to obtain pickle liquor and pickle slag;

C) washing the acid leaching residue with water, mixing the pulp, and screening to obtain barium sulfate;

and electrifying and electrodepositing the acid leaching clear solution to obtain the high-purity cathode copper.

2. The treatment method as claimed in claim 1, wherein the mixing of the copper anode plate washing slag, the sulfuric acid solution and the oxidant in the step a) comprises:

adding the washing slag of the copper anode plate into a sulfuric acid solution, heating to 60-90 ℃, and then adding an oxidant into the obtained mixed solution.

3. The treatment method as claimed in claim 1, wherein in the step A), the copper anode plate washing slag comprises elemental copper, copper oxide, barium sulfate and silicate;

in the anode plate washing slag, the content of copper element is 46.2 wt% -58.9 wt%, and the content of barium element is 20.56 wt% -26.12 wt%.

4. The treatment method according to claim 1, wherein in the step A), the concentration of the sulfuric acid solution is 200-300 g/L;

the mass ratio of the volume of the sulfuric acid solution to the washing slag of the copper anode plate is 0.6-1L: 100g of the total weight of the mixture;

the oxidant is selected from hydrogen peroxide, oxygen or air.

5. The treatment method according to claim 1, wherein in the step a), the oxidant is hydrogen peroxide;

the mass ratio of the hydrogen peroxide to the copper element in the anode plate washing slag is 1.1-1.5: 1.

6. the process according to claim 1, wherein the temperature of the acid leaching in step A) is 60 to 90 ℃.

7. The treatment method according to claim 1, wherein in step B), the concentration of the cationic polyacrylamide solution is 0.05 wt% to 0.06 wt%;

the volume ratio of the cationic polyacrylamide solution to the pickle liquor is 1: 35-45.

8. The treatment method according to claim 1, wherein the flocculation time in step B) is 8-15 min.

9. The process of claim 1, wherein in step C), the screening comprises: and (4) sieving the size after size mixing with a 200-mesh sieve.

10. The process of claim 1, wherein in step C), the parameters of the electrodeposition comprise: the current is 260-320A/m²The temperature is 55-68 ℃;

the electrolyte solution after the electrification and the electrodeposition is reused for acid leaching in the step A).

Technical Field

The invention relates to the technical field of treatment of anode plate washing slag, in particular to a treatment method of copper anode plate washing slag.

Background

In order to prevent the anode plate from being adhered to the copper mold and prevent the surface quality of the anode plate from being affected, a layer of mold release agent is usually coated on the casting mold before the copper smelting anode plate is cast. Barium sulfate has the characteristics of high melting point, stable property, no reaction with acid and alkali and the like. In actual production, barium sulfate is usually matched with a small amount of water glass to be used as a mold release agent for casting the copper anode plate. After the copper anode plate is cast and molded and demoulded, the copper anode plate is cooled and cooled in a circulating water tank usually. Under the action of cooling with cold water, most of the release agent adhered to the anode plate carries copper-containing materials to fall off from the anode plate and enter a cooling water tank to form anode casting washing slag. The washing slag mainly comprises copper (simple substance copper and copper oxide), barium sulfate and a small amount of silicate.

The water washed slag is usually returned to the smelting furnace for copper recovery. However, because barium sulfate in the washing slag has a high melting point, a large amount of coated elemental copper or cuprous oxide can easily enter the slag during smelting and slagging, the quantity of the smelting slag is increased, the direct yield of copper is reduced, and the furnace returning treatment cost is greatly increased. The existing process research for carrying out open-circuit treatment on washing slag is as follows:

the first literature, "experimental research on enrichment of barium sulfate from anode furnace washing slag" proposes that barium sulfate is enriched from anode furnace washing slag by adopting a hydrocyclone reselection-acid leaching purification process, wherein the process adopts gravity-leaching washing slag, and the slag after selection is divided into three stages: 47% of coarse sand, 26% of medium sand and 27% of fine sand, wherein the coarse sand is returned to a furnace, and the fine sand is recycled. Acid leaching and oxidizing the medium sand, and recycling the acid leaching residue enriched barium sulfate and the fine sand to continuously serve as a release agent. The whole process needs first reselection, then oxidation leaching and finally screening, and has longer flow and more related working procedures. The problem of small recycling force of copper is that: according to the process, only oxidation acid leaching is carried out on medium sand (containing 39% of copper), and high-copper coarse sand (containing 79% of copper and 9.6% of barium sulfate) is still returned to the furnace for treatment, so that most of copper and a small amount of barium sulfate (accounting for 78% of total copper and 10% of total barium sulfate of water washing slag) in the water washing slag are not directly recovered and enter a smelting system for treatment, the process is long, and the cost is high. In specific production practice, the release agent contains a small amount of water glass (sodium silicate) which is finally enriched in the washing slag, and the washing slag can form silica gel in the acid leaching process, thereby seriously affecting the filtration. The recovery of barium sulfate by the integral process is embodied in the concentrate and acid leaching residue (containing 96 percent of barium sulfate), and the integral recovery rate of barium sulfate is 89 percent.

Patent CNIO3966457A proposes the recovery of copper and barium sulfate from the washing slag by high-temperature concentrated acid oxidation leaching. The process for leaching copper and barium sulfate from the washing slag by high-temperature concentrated acid mainly has the problems that the temperature is 200-500 ℃, the concentration of sulfuric acid is 18mol/L, the requirements of high-temperature and high-acid working conditions on equipment are quite high, and the energy consumption is large. A large amount of dilute acid is generated after the pickle liquor is diluted, and the dilute acid can be discharged after being treated, so that the treatment cost is increased.

Disclosure of Invention

In view of this, the technical problem to be solved by the present invention is to provide a method for treating copper anode plate washing slag, which has the advantages of simple process and high recovery rate of additional products.

The invention provides a treatment method of copper anode plate washing slag, which comprises the following steps:

A) mixing the copper anode plate washing residue, a sulfuric acid solution and an oxidant, and performing acid leaching to obtain a pickle liquor;

B) mixing the pickle liquor with a cationic polyacrylamide solution, and performing flocculation precipitation to obtain pickle liquor and pickle slag;

C) washing the acid leaching residue with water, mixing the pulp, and screening to obtain barium sulfate;

and electrifying and electrodepositing the acid leaching clear solution to obtain the high-purity cathode copper.

Preferably, in the step a), the mixing the copper anode plate washing slag, the sulfuric acid solution and the oxidant comprises:

adding the washing slag of the copper anode plate into a sulfuric acid solution, heating to 60-90 ℃, and then adding an oxidant into the obtained mixed solution.

Preferably, in the step A), the washing slag of the copper anode plate comprises elemental copper, copper oxide, barium sulfate and silicate;

in the anode plate washing slag, the content of copper element is 46.2 wt% -58.9 wt%, and the content of barium element is 20.56 wt% -26.12 wt%.

Preferably, in the step A), the concentration of the sulfuric acid solution is 200-300 g/L;

the mass ratio of the volume of the sulfuric acid solution to the washing slag of the copper anode plate is 0.6-1L: 100g of the total weight of the mixture;

the oxidant is selected from hydrogen peroxide, oxygen or air.

Preferably, in the step A), the oxidant is hydrogen peroxide;

the mass ratio of the hydrogen peroxide to the copper element in the anode plate washing slag is 1.1-1.5: 1.

preferably, in the step A), the temperature of acid leaching is 60-90 ℃.

Preferably, in the step B), the concentration of the cationic polyacrylamide solution is 0.05-0.06 wt%;

the volume ratio of the cationic polyacrylamide solution to the pickle liquor is 1: 35-45.

Preferably, in the step B), the flocculation and precipitation time is 8-15 min.

Preferably, in step C), the screening comprises: and (4) sieving the size after size mixing with a 200-mesh sieve.

Preferably, in step C), the parameters of the electrodeposition include: the current is 260-320A/m²The temperature is 55-68 ℃;

the electrolyte solution after the electrification and the electrodeposition is reused for acid leaching in the step A).

The invention provides a treatment method of copper anode plate washing slag, which comprises the following steps: A) mixing the copper anode plate washing residue, a sulfuric acid solution and an oxidant, and performing acid leaching to obtain a pickle liquor; B) mixing the pickle liquor with a cationic polyacrylamide solution, and performing flocculation precipitation to obtain pickle liquor and pickle slag; C) washing the acid leaching residue with water, mixing the pulp, and screening to obtain barium sulfate; and electrifying and electrodepositing the acid leaching clear solution to obtain the high-purity cathode copper. The invention solves the problem of comprehensive recovery of valuable elements from anode plate casting washing slag, creatively provides a technical scheme for treating the washing slag by oxidizing acid leaching, avoids the problem of furnace return treatment of the traditional washing slag, is different from other wet treatment processes, and has the advantages of simple process, short flow, low equipment requirement and increased added value of products. In the invention, the washing slag is directly oxidized and leached by acid, and the leaching rate of copper is not lower than 96 percent; cationic polyacrylamide is added into the pickle liquor, so that the problem of difficult filtration caused by silica gel generated by acidification of sodium silicate in washing slag is thoroughly solved; directly screening the acid leaching residue to obtain barium sulfate, wherein the recovery rate of the barium sulfate is higher than 98%, the barium sulfate is fully recovered, and oversize materials are copper particles and are returned to the anode furnace; the acid leaching clear liquid is electrodeposited to produce high-purity cathode copper which can be directly sold as a product, and the liquid after electrodeposition can be returned to the acid leaching process for recycling, so that the investment of sulfuric acid is reduced, and the cost is reduced.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a treatment method of copper anode plate washing slag, which comprises the following steps:

A) mixing the copper anode plate washing residue, a sulfuric acid solution and an oxidant, and performing acid leaching to obtain a pickle liquor;

B) mixing the pickle liquor with a cationic polyacrylamide solution, and performing flocculation precipitation to obtain pickle liquor and pickle slag;

C) washing the acid leaching residue with water, mixing the pulp, and screening to obtain barium sulfate;

and electrifying and electrodepositing the acid leaching clear solution to obtain the high-purity cathode copper.

In certain embodiments of the present invention, the copper anode plate slag includes elemental copper, copper oxide, barium sulfate, and silicate. In some embodiments of the invention, the content of the copper element in the anode plate washing slag is 46.2 wt% to 58.9 wt%, and the content of the barium element in the anode plate washing slag is 20.56 wt% to 26.12 wt%. In some embodiments of the invention, the main chemical composition of the anode plate washing slag is shown in table 1.

TABLE 1 main chemical composition of anode plate washing slag

Element(s)	Cu	Fe	SiO2	Sb	Bi
						Content, wt%	46.2～60.9	0.031～0.067	1.22～1.87	0.002～0.0069	0.043～0.081
Element(s)	As	Pb	Zn	Ba
						Content, wt%	0.042～0.078	0.19～0.43	0.031～0.052	20.56～26.12

In some embodiments of the present invention, the concentration of the sulfuric acid solution is 200-300 g/L. In certain embodiments, the concentration of the sulfuric acid solution is 240g/L or 280 g/L.

In some embodiments of the invention, the mass ratio of the volume of the sulfuric acid solution to the washing slag of the copper anode plate is 0.6-1L: 100 g. In certain embodiments, the mass ratio of the volume of the sulfuric acid solution to the copper anode plate washing slag is 0.8L: 100g or 1L: 100 g.

In certain embodiments of the present invention, the oxidant is selected from hydrogen peroxide, oxygen, or air.

In some embodiments of the invention, the oxidant is hydrogen peroxide, and the mass ratio of the hydrogen peroxide to the copper element in the anode plate washing slag is 1.1-1.5: 1. in some embodiments, the mass ratio of the hydrogen peroxide to the copper element in the anode plate washing slag is 1.5: 1.

the method comprises the steps of mixing the copper anode plate washing residue, a sulfuric acid solution and an oxidant, and carrying out acid leaching to obtain an acid leaching solution.

In certain embodiments of the present invention, mixing the copper anode plate wash sludge, the sulfuric acid solution, and the oxidizing agent comprises:

adding the washing slag of the copper anode plate into a sulfuric acid solution, heating to 60-90 ℃, and then adding an oxidant into the obtained mixed solution.

In some embodiments of the present invention, after adding the copper anode plate washing slag into the sulfuric acid solution, the method further comprises: and (4) stirring. The stirring method is not particularly limited in the present invention, and a stirring method known to those skilled in the art may be used.

In certain embodiments of the invention, the temperature of the acid leaching is 60 to 90 ℃. In certain embodiments, the temperature of the acid leach is 70 ℃ or 80 ℃.

And after the acid leaching solution is obtained, mixing the acid leaching solution with a cationic polyacrylamide solution, and performing flocculation precipitation to obtain an acid leaching clear solution and acid leaching residues.

In certain embodiments of the invention, the concentration of the cationic polyacrylamide solution is between 0.05 wt% and 0.06 wt%. In certain embodiments, the concentration of the cationic polyacrylamide solution is 0.06 wt%.

In certain embodiments of the present invention, the volume ratio of the cationic polyacrylamide solution to the pickle liquor is 1: 35-45. In certain embodiments, the volume ratio of the cationic polyacrylamide solution to the pickle liquor is 1: 40.

the method for preparing the cationic polyacrylamide solution is not particularly limited in the present invention, and the method for preparing the cationic polyacrylamide solution well known to those skilled in the art can be used. In certain embodiments of the present invention, the cationic polyacrylamide solution is prepared according to the following method:

dissolving the cationic polyacrylamide with warm water, and controlling the concentration of the cationic polyacrylamide solution to be 0.05-0.06 wt%.

In some embodiments of the invention, the warm water has a temperature of 30-45 ℃. Too high water temperature may cause the flocculant to degrade and lose efficacy, and too low water temperature may cause the flocculant to dissolve for a long time and insufficiently.

In some embodiments of the invention, the flocculation time is 8-15 min. In certain embodiments, the time for flocculation is 10 min.

In certain embodiments of the invention, after the flocculation, filtration is also included. In certain embodiments of the invention, the filtered acid leach liquor has a solids suspension of no more than 10 mg/L. The filtering method is not particularly limited, a plate filter press or a suction filter and other devices can be adopted, the acid leaching clear liquid and the acid leaching residues can be separated, and the suspended solid in the acid leaching clear liquid is not higher than 10 mg/L.

In the invention, the acid leaching residue is washed by water, then is subjected to size mixing and screening to obtain barium sulfate.

The concentration of the slurry after size mixing is not particularly limited, and the barium sulfate and the large-particle slurry can be easily separated; too low a slurry concentration increases the filtration capacity, and too high a slurry concentration may result in incomplete separation of barium sulfate from large particle slurry. In certain embodiments of the present invention, the slurry concentration after the slurry mixing is 20 wt% to 50 wt%.

In certain embodiments of the invention, the screening comprises: and (4) sieving the size after size mixing with a 200-mesh sieve.

After sieving, the undersize product is barium sulfate which can be directly reused as a mold release agent, and the oversize product is large copper particle particles which can be returned to an anode furnace for treatment.

In the invention, the acid leaching clear solution is electrified and electrodeposited to obtain the high-purity cathode copper.

In some embodiments of the invention, the parameters of the electrodeposition include: the current is 260-320A/m²The temperature is 55-68 ℃. In some embodiments, the current of the electrodeposition is 280A/m²Or 300A/m². In certain embodiments, the temperature of the electrodeposition is 60 ℃.

In certain embodiments of the invention, the electro-winning liquid is recycled to the acid leaching in step a).

Electrifying and electrodepositing the acid leaching clear solution, and generating high-purity cathode copper (more than 99.997%) at the cathode by copper ions due to low impurities in the acid leaching clear solution. Sulfuric acid is generated in the process of acid leaching clear liquid electrodeposition, and the solution after electrodeposition can be directly returned to the acid leaching process in the step A) for recycling, so that the use of sulfuric acid is saved, and the cost is further reduced. The acid concentration in the electrolyte needs to be maintained stable in the electrifying electrodeposition process, and the acid leaching process of returning the liquid after electrodeposition to the step A) has the advantage that the concentration of sulfuric acid in the electrolyte in the electrifying electrodeposition process can be balanced to ensure the stability of the electrifying electrodeposition process, because the acid amount generated in the electrifying electrodeposition process is equal to the acid amount consumed in the acid leaching process.

The source of the above-mentioned raw materials is not particularly limited in the present invention, and may be generally commercially available.

The invention solves the problem of comprehensive recovery of valuable elements from anode plate casting washing slag, creatively provides a technical scheme for treating the washing slag by oxidizing acid leaching, avoids the problem of furnace return treatment of the traditional washing slag, is different from other wet treatment processes, and has the advantages of simple process, short flow, low equipment requirement and increased added value of products. In the invention, the washing slag is directly oxidized and leached by acid, and the leaching rate of copper is not lower than 96 percent; cationic polyacrylamide is added into the pickle liquor, so that the problem of difficult filtration caused by silica gel generated by acidification of sodium silicate in washing slag is thoroughly solved; directly screening the acid leaching residue to obtain barium sulfate, wherein the recovery rate of the barium sulfate is higher than 98%, the barium sulfate is fully recovered, and oversize materials are copper particles and are returned to the anode furnace; the acid leaching clear liquid is electrodeposited to produce high-purity cathode copper which can be directly sold as a product, and the liquid after electrodeposition can be returned to the acid leaching process for recycling, so that the investment of sulfuric acid is reduced, and the cost is reduced.

In order to further illustrate the present invention, the following will describe the treatment method of the copper anode plate washing slag in detail with reference to the examples, but they should not be construed as limiting the scope of the present invention.

The main chemical components of the copper anode plate washing slag in the embodiment are shown in the table 2.

Table 2 Main chemical composition of copper anode plate washing slag in example

Element(s)	Cu	Fe	SiO2	Sb	Bi	As	Pb	Zn	Ba
										Content, wt%	54.4	0.053	1.55	0.0051	0.064	0.066	0.32	0.04	22.84

Example 1

(1) Weighing 200g of anode plate washing slag, adding the anode plate washing slag into 240g/L of sulfuric acid solution, wherein the volume of the sulfuric acid solution is 1.6L, stirring the mixed slurry, heating to 70 ℃, and dropwise adding hydrogen peroxide into the pickle liquor. The mass ratio of the hydrogen peroxide to the copper element in the anode plate washing slag is 1.5: 1. after the dropwise addition of the hydrogen peroxide is finished, acid leaching (oxidation) is carried out for 1 h. The leaching rate of copper was 97%.

(2) And adding 40mL of cationic polyacrylamide solution with the concentration of 0.06 wt% into the acid leaching solution after the oxidation is finished, wherein the volume ratio of the cationic polyacrylamide solution to the acid leaching solution is 1: and 40, flocculating and precipitating the silica gel in the acid leaching solution for 10min, and filtering quickly to obtain acid leaching clear liquid and acid leaching residues. Composition of the filtered solution (i.e. acid-leached clear solution): cu 66g/L, Fe 0.06g/L, As 0.03g/L, Sb 0.005g/L, Bi 0.03.03 g/L, H₂SO₄ 140g/L。

(3) Washing acid leaching residues, then mixing the acid leaching residues into slurry, directly screening the slurry in a wet mode, and sieving the slurry through a 200-mesh sieve to obtain undersize products, namely barium sulfate, wherein the total amount of the undersize products is 47g, and the barium sulfate comprises the following components: cu 0.6 wt%, Fe 0.02 wt%, SiO₂ 3.2wt％、BaSO₄96 wt% of the copper powder can be directly reused as a mold release agent, and oversize products which are large-particle elementary copper particles can be returned to the anode furnace for treatment.

(4) Electrifying and electrodepositing the acid leaching clear solution, and generating high-purity cathode copper (containing more than 99.997 percent of copper) at the cathode by copper ions due to low impurities in the acid leaching clear solution. Electrodeposition process parameters: current 280A/m²At a temperature of 60 ℃. Sulfuric acid is generated in the process of acid leaching clear liquid electrodeposition, and the liquid after electrodeposition can be directly returned to the acid leaching process in the step (1) for recycling, so that the use of sulfuric acid is saved, and the cost is further reduced.

In the whole process, the recovery rate of copper is 98 percent, and the recovery rate of barium sulfate is 98.8 percent.

The copper in the washing slag is divided into three parts, and the leaching solution, the oversize product and the undersize product (namely barium sulfate) are basically recovered except the copper entering the barium sulfate as loss.

The recovery rate of barium sulfate (undersize weight × mass fraction of barium sulfate in undersize)/(weight of water scrubbing slag × mass fraction of barium sulfate in water scrubbing slag) × 100%;

namely: the recovery yield η of barium sulfate was ═ 47 × 96%/(200 × 22.84%) × 100% ═ 98.8%.

Example 2

(1) Weighing 100g of anode plate washing slag, adding into 280g/L of sulfuric acid solution, wherein the volume of the sulfuric acid solution is 1L, stirring the mixed slurry, heating to 80 ℃, and dropwise adding hydrogen peroxide into the pickle liquor. The mass ratio of the hydrogen peroxide to the copper element in the anode plate washing slag is 1.5: 1. after the dropwise addition of the hydrogen peroxide is finished, acid leaching (oxidation) is carried out for 1 h. The leaching rate of copper was 96%.

(2) Adding 25mL of cationic polyacrylamide solution with the concentration of 0.0006 wt% into the pickle liquor after oxidation, wherein the volume ratio of the cationic polyacrylamide solution to the pickle liquor is 1: and 40, flocculating and precipitating the silica gel in the leachate for 10min, and filtering quickly to obtain acid leaching clear liquid and acid leaching residues. The filtered liquid component (i.e. acid leaching clear liquid): cu 52g/L, Fe 0.08g/L, As 0.02g/L, Sb 0.005g/L, Bi 0.02.02 g/L, H₂SO₄ 200g/L。

(3) Washing acid leaching residues, then mixing the acid leaching residues into slurry, directly screening the slurry in a wet mode, and sieving the slurry through a 200-mesh sieve to obtain undersize products, namely barium sulfate, wherein the total amount of the undersize products is 24g, and the barium sulfate comprises the following components: cu 0.5 wt%, Fe 0.01 wt%, SiO₂ 4.4wt％、BaSO₄95 wt%, can be directly reused as a mold release agent, and oversize materials are large particles of simple substance copper particles which can be returned to an anode furnace for treatment.

(4) Electrifying and electrodepositing the acid leaching clear solution, and generating high-purity cathode copper (containing more than 99.997 percent of copper) at the cathode by copper ions due to low copper impurities in the acid leaching clear solution. Electrodeposition process parameters: current 300A/m²At a temperature of 60 ℃. Sulfuric acid is generated in the process of acid leaching clear liquid electrodeposition, and the liquid after electrodeposition can be directly returned to the leaching process for recycling, so that the use of sulfuric acid is saved, and the cost is further reduced.

In the whole process, the recovery rate of copper is 98 percent, and the recovery rate of barium sulfate is 99.8 percent.

The copper in the washing slag is divided into three parts, and the leaching solution, the oversize product and the undersize product (namely barium sulfate) are basically recovered except the copper entering the barium sulfate as loss.

The recovery rate of barium sulfate (undersize weight × mass fraction of barium sulfate in undersize)/(weight of water scrubbing slag × mass fraction of barium sulfate in water scrubbing slag) × 100%;

the recovery yield η of barium sulfate was ═ (24 × 95%)/(100 × 22.84%) × 100% ═ 99.8%.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.