FIELD: metallurgy.
SUBSTANCE: proposed method comprises reduction of nickel using hydrate of sodium and bulk oxygen at mixing. Nickel is reduced at 700±10°C, consumption of bulk oxygen of 1.5-1.7% of the product weight and mixed for 10-15 min. Associated copper is separated by magnetic separation directly from fusion cake with temperature of 340-350°C. Note here that nickel deposit concentrated at magnetic rods and including alkaline fusion cake is subjected to flushing of sodium hydrate and sodium sulphate by water to wash off nonmagnetic sold particles of copper and separation of phases by centrifugation. Magnetic nickel precipitate is then washed off in water after demagnetisation of magnetic rods to obtain dehydrated nickel.
EFFECT: direct reduction of nickel with associated copper separation.
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