The first is to use the thick steel plate with high copper content in the thick copper pipe as the anode. In addition to making the copper sheet, it can be used as the cathode, and sulfuric acid and copper sulfate solution can be mixed together. For electric transmission, the copper tube will dissolve into copper ions and move from the anode and cathode. Later, electrons will be generated and cathode copper will be produced locally. We usually call it electrolytic copper. Some active elements of impurities in iron and zinc crude copper tubes will follow to dissolve into copper ions.

　　Because these ions will be more difficult than the copper ion precipitation method, in the case of electrolysis, it is necessary to reasonably adjust the potential difference to prevent the anode. In comparison, the relatively lazy impurities in copper tubes, such as gold and silver, will be stacked in the electrolytic cell. After the output of copper, we generally call it electrolytic copper. Its quality is often good. It can be used to make electrical products. After electrolytic copper, the electrolytic copper powder is processed very finely.

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