The paper presents the results of studying nonferrous metal transfer from the anode to the cathode through a porous auxiliary electrode. The porous auxiliary electrode is made of a conducting carbon material, permeable to molten salts and impermeable to molten metals. It was found that discharge of metal ions on the cathode side of an auxiliary electrode is observed only when the voltage drop across this electrode is higher than, or equal to, the decomposition voltage of the molten electrolyte. Thus, to ensure the discharge of metal ions on applying an electric field, the auxiliary electrode must have a corresponding resistance. It was found that under the combined transfer of some metal ions the metals with more electropositive potentials are discharged preferentially on the cathode side of the auxiliary electrode. Processes on the anode side of the auxiliary electrode are dependent on the nature of the metal being transferred, the electrolysis duration and the potential obtained. There are the following parallel reactions: oxidation of metal ions to the highest degree of oxidation, discharge of chloride ions and oxidation of metal deposited on the cathode side of this electrode. The electrode can be used in electrochemical processes for heavy nonferrous metal purification.