FIELD: metallurgy.
SUBSTANCE: method includes oxidation zincsulfide in aqueous alkaline solution at presence of oxygen gas at temperatures 80-90°C and regeneration of alkaline solution with usage of slaked lime with gypsum receiving. Additionally oxidation is implemented in aqueous solution of caustic soda with addition of cobalt sulphate with following filtration of solid oxidation product. Zinc extraction into solution is implemented by leaching of solid oxidation product.
EFFECT: oxidation rate increasing of sulphide and gypseous sludge utilisation, forming at solution regeneration.
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