FIELD: chemistry.
SUBSTANCE: invention relates to chemical engineering of inorganic substances and can be used in cases when there is need to produce a nickel concentrate. The method of processing oxidised nickel ore involves mixing the ore with ammonium chloride, heating the obtained mixture and water leaching to obtain a solution. The ammonium chloride is mixed with the material in ratio of 100-150 mol % of the stoichiometric quantity. The mixture is then heated to temperature 200-315°C and kept at that temperature until release of ammonia, water and hydrogen chloride stops. After water leaching, ammonia water is used to precipitate iron and aluminium at pH 6, nickel and cobalt at pH 8-8.5 and manganese, magnesium and calcium at pH above 8.5.
EFFECT: design of industrial processing oxidised nickel ore to obtain a nicke-cobalt concentrate.
1 dwg, 2 ex
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