FIELD: metallurgy.
SUBSTANCE: method includes preparation of charge out of lepidolite and spodumene concentrates, active charge preparation, making of sulphuric solution by sulphuric leaching with pulp separation by leaching to lithium sulphate solution and cake. At that prior to sulphuric leaching the activated charge is sulphated by sulphuric acid with consumption 1.2÷1.6 ml per 1 g of mixture for 4÷6 minutes, and sulphuric leaching is applied to sulphated charge for 40÷50 minutes.
EFFECT: increased degree of lithium extraction to solution and decreasing of leaching time.
1 tbl, 1 ex
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