The anode mud obtained during electrorefining of copper may contain

Electrorefining:Anode: Impure copper or crude copperCathode: Pure copperElectrolyte: 15% CuSO4​ Solution + 5% H2​SO4​When electric current is passed through the electrolyte, the anode gradually dissolves and pure copper is deposited on the cathode which gradually grows in size. Impurities like. Fe, Zn, Ni etc, dissolve in the solution as sulphates while gold, silver, platinum settle down below the anode as anode mud.