PROCESS OF OPTIMIZATION OF ELECTROLYTIC REFINING OF NICKEL Russian patent published in 2001 - IPC

FIELD: non-ferrous metallurgy. SUBSTANCE: invention specifically refers to optimization of parameters of electrolysis. Process includes stage of electrolysis with soluble anodes which is regulated by change of cathode density of current and temperature and in addition by change of concentrations of Ni²⁺, Na⁺, Cl^-, SO2-4

and distance between axes of analogous electrodes determined by regression equation: , where W_el- is specific consumption of energy for electrolysis proper, kW h/t; X₁- is concentration of ions of nickel in electrolyte; X₂- is concentration of ions of chlorine; X₃- is concentration of ions of sodium; X₄- is temperature, X₅- is distance between analogous electrodes along axes; X₆- is current density ( independent variables X_i are given on code scale ) and variation is carried out within following limits: . Concentration of sulfate ions in electrolyte is assumed proceeding from condition of electric neutrality: , where Э_i- is equivalent of i-th ion. EFFECT: reduced specific consumption of electric energy. 1 cl