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The physical and chemical characteristics of sludge from the chrome production in the Donskoy Ore Mining and Processing Plant (DOMPP) owned by TNK Kazchrome JSC have been studied. Researches have been performed to determine the gravity concentration ability of sludge tailings using fractional analysis, concentration tables. It was found that it is required to classify the initial sludge into size classes to obtain high technological parameters, and beneficiation with screw separators is ineffective. New data have ...