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This article analyses available methods for processing low-grade copper concentrates, including existing hydrometallurgical schemes of their conditioning. To this end, we review Russian and foreign publications investigating existing technologies for processing substandard copper raw materials, which are used to deepen the extraction of valuable components from raw materials. Particular attention is paid to the technologies of hydrometallurgical processing of raw materials in terms of theirdoi:10.21285/1814-3520-2022-2-320-335 fatcat:6wv4espsfrbwjei3ipwwcxbuwe