Electrorefining is a process used to purify metals, particularly copper, by using electricity. In this method, impure metal is made the anode in an electrolytic cell, while a pure metal sheet serves as the cathode. When an electric current passes through the solution, metal ions from the anode dissolve and migrate to the cathode, where they are deposited as pure metal. This technique is effective because it separates the desired metal from impurities, which either remain in the solution or settle at the bottom of the cell. Electrorefining is widely used in the mining and metallurgical industries to produce high-quality metals for various applications.