FIELD: metallurgy of non-ferrous metals, more particularly hydrometallurgy of nickel and cobalt. SUBSTANCE: the multistage ammonia-carbonate leashing of metallized nickel-cobalt materials is effected in the presence of air at its flow rate of 20-50 cu.m. per ton of the starting material at a redox potential of 310-450 mV. EFFECT: greater efficiency of the process.
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