Abstract—Physicochemical studies aimed at increasing the technological efficiency of the hydrometallurgical sulfuric acid processing of copper–nickel converter mattes are presented. The influence of preliminary quenching on sulfuric acid leaching at a sulfuric acid concentration of 100–200 g/L is studied on copper–nickel converter matte samples with the Ni to Cu weight ratios 2 : 1 and 3 : 4 taken from Norilsk Nickel. Preliminary quenching of the copper–nickel converter matte from 1200°C is found to shorten the leaching time by three times compared to the traditional leaching of the slowly cooled converter matte and to pass up to 99% Ni to the solution, leaving up to 74.5% Cu in a cake. A decrease in the Ni to Cu ratio from 2 : 1 to 3 : 4 in the quenched converter matte increases the yield of the copper cake.
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This work was carried out in terms of state assignment no. 075-00746-19-00.
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Translated by E. Yablonskaya
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Bol’shikh, A.O., Tsybin, O.I., Bol’shikh, M.A. et al. Leaching of Rapidly Cooled Copper–Nickel Converter Mattes. Russ. Metall. 2020, 1331–1334 (2020). https://doi.org/10.1134/S0036029520110051
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DOI: https://doi.org/10.1134/S0036029520110051