FIELD: chemistry.
SUBSTANCE: invention relates to production of secondary battery materials, such as lithium, and secondary battery raw materials-precursors Ni, Co, Mn (NCM) from black mass extracted from secondary battery scrap. Method includes calcination and pre-extraction steps, a first evaporation concentration step, a leaching step, a first purification step, subsequent extraction and supply steps, phosphate precipitation and sulphate production steps, stages of carbonate precipitation and hydroxide production, second stage of concentration by evaporation, stage of leaching with weak acid with production of NCM solution, second stage of purification, stage of NCM solution supply.
EFFECT: method increases degree of extraction of lithium and secondary battery precursor metals.
6 cl, 3 dwg, 1 ex
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