Clean recovery and production method for waste copper and copper-containing waste

Abstract

The invention discloses a clean recovery and production method for waste copper and copper-containing waste. The method comprises the following steps of: sorting and classifying the copper-containing waste, and cleaning the sorted waste copper by adopting a sulfuric acid solution to obtain qualified copper and a low-grade copper sulfate solution; dissolving the qualified copper into a copper sulfate solution to obtain a high-grade copper sulfate solution; processing and granulating the sorted copper-containing material or electronic garbage, and dissolving the granulated copper-containing material into a sulfuric acid solution to obtain a low-grade copper sulfate solution and waste slag; sequentially performing extraction and back extraction on the low-grade copper sulfate solution to obtain a high-grade copper sulfate solution; and performing electro-deposition on the high-grade copper sulfate solution to produce a cathode copper or copper product blank, and processing the copper product blank into various copper products. By the method, the high-content waste copper material can be effectively recovered, the waste copper material with low copper content can also be effectively recovered, and the recovery rate reaches 99 to 100 percent. According to the method, pollutants are not discharged, and any fuel is not adopted; and the method is reasonable in design, simple in process, strong in practicability and easy to popularize and implement.

Description

technical field [0001] The invention relates to a recycling method for turning waste into treasure, in particular to a clean recycling production method for scrap copper and copper-containing scrap. Background technique [0002] my country's copper reserves are 63 million tons, accounting for 6.2% of the world's total. At present, the annual copper production is 1.5 million tons, and the annual copper consumption is 4.5 million tons. my country is a big copper-consuming country and needs to import a large amount of copper every year, and the import from Chile alone is as high as 32%. However, my country's annual output of scrap copper is as high as 2 million tons (including all kinds of electricity, electrical appliances, electronic elimination, scrapping and various copper-containing materials). According to statistics, at present, there is a large amount of electrical and electronic products eliminated each year in my country, and these electrical and electronic products ...

AI Technical Summary

Problems solved by technology

Among them, the recycling of copper is done by the traditional fire method. In order to pursue short-term benefits, many workshops use outdated methods such as open-air incineration and strong acid immersion to dispose of waste electrical and electronic products, and discharge waste, waste liquid, and waste residue at will, resulting in serious environmental pollution, endangering human health