Waste copper pretreating and refining technology

Abstract

The invention discloses a metal smelting technology, and provides a waste copper pretreating and refining technology. The key points of the technical scheme are as follows: the waste copper is pretreated before smelting to remove dirt, sump oil and high-molecular compound on the surface of the waste copper product, so as to avoid polluted gas generated by the waste copper product in the smelting process and reduce production pollution; secondly the oxidation film such as aluminum oxide formed on the surface of the waste copper alloy product can be broken by the pretreatment, for example, the melting point of aluminum oxide is higher than the refining temperature, and aluminum oxide is easy to form into an interstitial solid solution when being refined and then is mixed with the copper alloy finished product, so that the quality of the finished product is reduced; in the follow-up refining process, the process route can be determined according to the final finished product: if the finished product is copper alloy, the alloy elements are added during the refining process to obtain the final product, and if the finished product is pure copper, the copper is cast into an anode plate after refining, and then is electrolytically refined to obtain the pure copper product.

Description

technical field [0001] The invention relates to the technical field of metal smelting, more specifically, it relates to a waste copper pretreatment and refining process. Background technique [0002] In daily life and industrial manufacturing, a lot of scrap copper is often produced, such as: discarded red copper wire, brass in the socket, bronze and white copper on the door frame, etc., its composition is relatively complex, in addition to containing a large amount of metallic copper, It also contains a certain amount of iron, aluminum, sand, oil and other impurities. Because it is difficult to deal with this kind of scrap copper, most of the scrap copper is processed in a simple way at present and then sold out, which will not only cause some pollution to the environment, but also make the comprehensive utilization efficiency of the resources in the scrap copper not high. Cause valuable components such as metallic copper to lose in vain. In order to recycle the valuable ...

AI Technical Summary

Problems solved by technology

Because it is difficult to deal with this kind of scrap copper, most of the scrap copper is processed in a simple way at present and then sold out, which will not only cause some pollution to the environment, but also make the comprehensive utilization efficiency of the resources in the scrap copper not high. Lead to the loss of valuable components such as metal copper

In order to recycle the valuable metals of waste copper scraps, in the past, some manufacturers used technologies such as iron removal and calcination to process waste copper scraps and sell them as raw materials. Although the process is simple, the pollution is serious, and the purpose of comprehensive resource recycling cannot be achieved. Because there are more oil stains and polymer compounds on the surface of scrap copper products, a large amount of harmful gas is produced during scrap copper smelting, which endangers the health of workers and pollutes the environment.

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