Technology for removing bismuth from copper electrolyte with low cost

Abstract

The invention discloses a technology for removing bismuth from copper electrolyte with low cost. The technology comprises the following steps of: leaching and filtering soot or slag to obtain primary leached residue, modifying the primary leached residue to obtain a modified bismuth removing agent, adding the modified bismuth removing agent into a reaction container, fully mixing and stirring the modified bismuth removing agent and the electrolyte, adsorbing and co-precipitating Bi, Sb and the like in the electrolyte through the bismuth removing agent by using the principle of similar adsorption of insoluble substances, and returning the filtered Bi-removed electrolyte to a production system, wherein the Bi removing effect of the bismuth removing agent declines after multiple times of cycle, the bismuth removing agent can be reused after resolving and pulverizing, and valuable metals in the bismuth removing agent can be recovered by treatment. 'Three wastes' are not produced in the whole process, normal production of a master system is not interfered, noble raw materials, high energy consumption and manpower resource expenses for the conventional bismuth (and antimony) removal are reduced, and harm of bismuth, antimony and arsenic of high-quality cathode copper produced by using a mineral copper anode plate is eliminated; and the technology is expected to become a new technical turning point of copper electrolytic refining, so that the copper electrolytic refining way is flatter.

Description

Technical field The invention belongs to the field of non-ferrous metallurgy, and relates to a process for removing bismuth from a copper electrolytic solution in the process of producing high-purity cathode copper through electrolytic refining of a copper anode plate produced by copper concentrate. Background technique In the process of copper smelting and purification, the pyro-refining process of blister copper cannot effectively remove Sb and Bi elements, which are mixed in the intercrystalline interface of copper in the form of complex oxides, intermetallic compounds or solid solutions, which is likely to cause the final copper anode plate The Sb and Bi impurity content in the medium exceeds the standard for copper electrolytic refining technology. In the copper electrolytic refining process, the hazards of Sb and Bi mainly depend on the concentrations of As, Sb and Bi in the electrolyte, while the concentrations of As, Sb and Bi in the electrolyte depend on the impurit...

AI Technical Summary

Problems solved by technology

The purpose of the present invention is to provide a method for the copper smelting industry to produce high-purity cathode copper by using high-antimony bismuth ore copper anode plate to remove bismuth (and antimony) process, so that the purified copper electrolyte contains less than 0.2g / l of bismuth and less than 0.3g / l of antimony, which solves the hidden danger of bismuth in terms of electrolyte composition and solves the problem of existing copper electrolyte removal of bismuth elements Existing problems of high energy consumption and high cost provide help for comprehensively improving the quality of electrical copper

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