Electrolytic refining is a process used to purify metals, such as copper and gold. It involves using an electric current to separate impurities from the desired metal. In this method, an impure metal is made the anode, while a pure metal serves as the cathode in an electrolytic cell filled with a suitable electrolyte solution. As the electric current passes through the cell, the pure metal ions dissolve from the anode and migrate to the cathode, where they are deposited as pure metal. This technique is efficient and produces high-purity metals, making it essential in the metal refining industry.