Technology for separating copper, zinc and iron in scrap copper smelting slag leaching process

Abstract

The invention relates to a technology for separating copper, zinc and iron in a scrap copper smelting slag leaching process. The technology for separating the copper, zinc and iron in the scrap copper smelting slag leaching process comprises the following steps: (1) performing selective zinc leaching on the scrap copper smelting slag; (2) performing weak acid leaching on the selectively leached slag; (3) heating a solution after weak acid is leached and adding an oxidizing agent, so that copper zinc alloy is contained in acid leaching solution, and iron is contained in acid leaching slag; (4) extracting copper from the acid leaching solution, so that copper is separated from zinc and iron; (5) returning raffinate into the selective zinc leaching step, wherein zinc is recycled after being returned into selective leaching solution, and residual copper and iron are sedimented into the selective leaching slag by virtue of a selective leaching process. The technology for separating the copper, zinc and iron in the scrap copper smelting slag leaching process has the advantages of short technological process, low investment and operating cost, simple operation, short leaching period, high recovery rate of copper and zinc and the like, copper and zinc in scrap copper smelting slag can be environmental friendly, efficiently and quickly leached out, and copper can be separated from copper; the technology for separating the copper, zinc and iron in the scrap copper smelting slag leaching process is especially applicable to treatment on scrap copper smelting slag with high iron content and high copper zinc content.

Description

technical field [0001] The invention relates to a new process for separating copper, zinc and iron in the leaching process of waste miscellaneous copper smelting slag. Background technique [0002] In recent years, with the strengthening of circular economy and national environmental protection policy, resource regeneration has been paid more and more attention. As an important part of the regeneration of copper resources, a large amount of smelting slag will be produced during the recycling process of scrap copper. These smelting slags are mostly treated by pyrolysis. With the increasing demand for energy conservation and environmental protection in the country, wet treatment of these smelting slags has become a trend of development. In the process of wet treatment, there must be a problem of iron removal, and the introduction of the iron removal program alone will inevitably lead to a long treatment process and high energy consumption. Therefore, it is necessary to explor...

AI Technical Summary

Problems solved by technology

These methods all require a separate iron removal step, increasing the iron removal process and increasing the burden on the enterprise

Images