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Method for removing chlorine in copper sulfate solution by copper refining slag

A copper sulfate solution and copper refining technology, which is applied in the field of copper refining slag to remove chlorine in copper sulfate solution, can solve the problems of low adsorption capacity of exchange resin, easy leakage, high components of regenerated water treatment, etc., and achieve low production cost and wide sources , the effect of simple steps

Inactive Publication Date: 2017-02-22
江西自立环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The exchange resin used in this method has low adsorption capacity and is easy to leak. The slightly high-concentration copper sulfate solution crystallizes in the resin, which makes it difficult to regenerate the resin. The regenerated low-concentration chlorine-containing wastewater cannot be consumed internally. high

Method used

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  • Method for removing chlorine in copper sulfate solution by copper refining slag

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The composition of a copper sulfate leach solution is shown in Table 1.

[0029] Table 1 Copper sulfate leaching solution (g / L)

[0030] project H2SO4 Cu Cl Copper Sulfate Leaching Solution 91.46 83.79 3.65

[0031] (1) Crushing and ball milling the copper refining slag to pass 120 mesh, the copper refining slag (dry basis) contains 39.95% copper.

[0032] (2) The concentration of Cl in the copper sulfate leaching solution is 3.65g / L, and the volume is 1L. Add 18.2g of the refining slag obtained in step (1), heat the solution to 65-70°C, stir and react for 60min, then suction filter, and the filtrate contains 50mg / L of chlorine.

Embodiment 2

[0034] The composition of a copper leaching solution is shown in Table 2.

[0035] Table 2 Copper leaching solution (g / L)

[0036] project H2SO4 Cu Cl Copper Sulfate Leaching Solution 94.39 75.6 2.92

[0037] (1) Crushing and ball milling the copper refining slag to pass 200 mesh, the copper refining slag (wet basis) contains 40.18% of copper;

[0038] (2) The concentration of Cl in the copper sulfate leaching solution is 2.92g / L, and the volume is 1L. Add 17.52g of refining slag (wet basis) obtained in step (1), heat the solution to 65-70°C, stir and react for 60min, then suction filter, the filtrate contains chlorine 100mg / L.

[0039] Copper refining slag removes chlorine in copper sulfate solution, and can treat copper sulfate solution with chloride ions in the range of 0.1-10g / L, and the concentration of chloride ions in copper sulfate solution can be reduced to 100mg / L as long as an appropriate amount is added.

[0040] The invention has simp...

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Abstract

The invention discloses a method for removing chlorine in a copper sulfate solution by copper refining slag. The method for removing the chlorine in the copper sulfate solution by the copper refining slag comprises the following steps that the copper refining slag is smashed, ball-milled to a certain particle size, and then added into the copper sulfate solution containing the chlorine; and sub copper and chlorine ions in the copper refining slag are formed into cuprous chloride which is insoluble in acid, and after the cuprous chloride is filtered by a plate-and-frame press filter, a low chloride copper sulfate solution is obtained. The method can be widely used for removing the chlorine ions of all kinds of concentrations in the copper sulfate solution, the steps are easy, and operation is simple and convenient; the sources of antichlor are wide, production cost is low, secondary pollution is not generated in the whole production process, and chlorine removing slag can be returned to conduct fire melting to extract copper.

Description

technical field [0001] The invention relates to the field of nonferrous metal hydrometallurgy, in particular to a method for removing chlorine in copper sulfate solution from copper refining slag. Background technique [0002] Copper refining slag is the slag produced in the process of oxidation and impurity removal of blister copper or scrap copper and reduction and refining of copper. Since blister copper or scrap copper contains easily oxidizable impurities such as Fe, Pb, Zn, Ni, As, Sb, Sn, Sb, etc., these oxides are more stable than cuprous oxide and have the characteristics of low melting, so these impurities During the oxidation and impurity removal process, slag is formed on the surface of the copper liquid in the form of oxides. Therefore, in addition to copper in the form of Cu2O, metallic copper, copper silicate, and copper ferrite, copper refining slag also contains compounds such as lead, tin, arsenic, antimony, zinc, nickel, and cobalt. Copper refining slag ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/04C22B15/00
CPCC22B7/007C22B7/04C22B15/0089Y02P10/20
Inventor 詹有北宁建平柯兆华
Owner 江西自立环保科技有限公司
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