In copper refining, this slime contains the precious metals that are recovered from it.We look into the anode mud under the electrometallurgy and sometimes pyrometallurgy. During the anodic dissolution of an impure electrode (e.g. in an electrorefining or electro deposition process) a residue may form which is called anode mud .It contains elements which are insoluble under the conditions of the electrodissolution process and thus sediment near the anode.