METHOD OF PRODUCTION OF ELECTROLYTIC NICKEL Russian patent published in 2007 - IPC C25C1/08 C22B23/00 

FIELD: non-ferrous metallurgy; production of cathode nickel from sulfide copper-nickel raw material.

SUBSTANCE: proposed method includes floatation separation of converter matte into copper and nickel concentrates, oxidizing annealing of nickel concentrate, reduction of nickel monoxide, leaching-out of reduced nickel monoxide, cleaning the leaching-out solutions in succession from iron, copper, cobalt and electrical extraction of nickel. Electrical extraction of nickel is carried out in the electrolysis baths provided with anode cells from nickel electrolyte containing 40-85 g/l of sulfate and no less than 45 g/l of chloride for production of electrolyte nickel of required grades; gas-and-liquid mixture thus formed is removed from anode cell and is separated into gas phase mainly containing chlorine which is used for chloride leaching-out of reduced nickel monoxide and acid anolyte which is used for diluting the leaching-out solution prior to cleaning from copper.

EFFECT: enhanced efficiency.

2 cl, 2 dwg, 2 tbl, 2 ex