A method for recycling high-purity copper from metal scrap

Abstract

The invention relates to the technical field of metal waste treatment, in particular to a method for recovering and regenerating high-purity copper from metal waste, including dissolution and leaching, pressure filtration separation, complexation iron removal, extraction and impurity removal, and copper electrodeposition processes. In the process, a titanium-plated lead dioxide sheet with a SnO2‑Sb2O3 intermediate layer is used as the anode, thereby reducing the contact resistance between the coating and the substrate, making the anode surface current uniform, improving the performance of the PbO2 active layer, and effectively improving The efficiency and quality of electrodeposition products are improved, and the purity of copper obtained by electrodeposition is as high as 99.99%. The invention adopts an oxidation, dissolution and leaching process for metal waste without crushing, avoids pollution such as noise and dust, has a high recovery rate, and can recycle metal copper from metal waste with extremely low copper content. The technological process of the present invention is simple and effective, with low energy consumption, and recycles the slag washing water, stripping organic phase and anolyte produced in the technological process, reduces waste liquid discharge and avoids environmental pollution.

Description

technical field [0001] The invention relates to the technical field of metal waste treatment, in particular to a method for recovering and regenerating high-purity copper from metal waste. Background technique [0002] In recent years, various countries have paid more and more attention to the sustainability of raw material utilization. The idea of ​​reuse and recycling plays an important role in choosing materials and designing products. If managed properly, recycling has the potential to expand resource utilization and enable Energy consumption, emissions and waste disposal are kept to a minimum, so recycling is increasingly seen as a necessary and beneficial complement to primary metal production. [0003] Copper is not only an ancient metal, but also a modern engineering material full of vigor and vitality. It has good ductility, high thermal and electrical conductivity, so it is often used in cables and electrical and electronic components, and can also be used as a bui...

AI Technical Summary

Problems solved by technology

In modern industry, the production of metal waste is unavoidable. These metal wastes include copper plating tank slag and sludge, copper waste catalyst, copper etching solution sludge, copper plating sludge, copper-containing waste rock, copper oxidation sludge, etc., if Directly discarding these metal scraps will cause serious heavy metal environmental pollution and waste of resources. Therefore, a method that can recover recycled metal copper from metal scraps is needed

[0004] The traditional copper recovery and regeneration process mostly adopts pyrometallurgy copper smelting. This process can only deal with waste residue with high copper content, and the energy consumption in the recovery and regeneration process is high, which increases the cost of copper recovery and regeneration, and causes serious environmental pollution. The rate is low, and the purity of recycled copper is poor

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