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Iron powder reduces copper
Because the metal activity of Fe is in front of Cu, so Fe can replace Cu in the solution containing Cu ions. For example, simple copper can be reduced from copper sulfate. This reaction is substitution reaction. Reduced iron powder is usually used in copper replacement reaction in chemical industry. Reduced iron powder is mainly composed of simple iron, which has the advantages of high iron content and little impurity content In the chemical industry, the recovery of copper in the waste material is usually first burned to generate black copper oxide, and then sulfuric acid is used to dissolve the waste material. After dissolution, copper sulfate solution and insoluble impurities are generated. The blue copper sulfate solution filtered by the solution is added with reduced iron powder, and the copper powder can be quickly replaced.
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