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Substantiation of the Possibility to Organize a Complex Two-Stage Sulfuric Acid Leaching Technology for Pyrrhotine Middlings

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Russian Metallurgy (Metally) Aims and scope

Abstract

A two-stage technological scheme is proposed for the processing of pyrrhotine middlings and poor copper–nickel raw materials. The hydrolytic cleaning of cycling leaching solutions from iron is separated as a particular procedure. The laboratory studies of the two-stage sulfuric acid leaching with the hydrolytic cleaning of a cycling solution from iron is carried out for representative samples of the pyrrhotine middlings with a low nickel content (~0.7%) from Norilsk Nickel. The technology gives an oxidized ferrous cake with a low content of nonferrous and platinum metals (about 0.05%) and a sulfur–sulfide concentrate, in which all nonferrous and platinum metals and technical sulfur are concentrated. Up to 60% iron are shown to be leached from the middlings within the full cycle (two stages), and only 40% processed middlings are retained as a sulfur–sulfide concentrate containing 60–65% elemental sulfur and up to 30% gangue (rock-forming minerals).

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Funding

This work was carried out in terms of state assignment no. 007-00129-18-00.

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Authors and Affiliations

  1. Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Moscow, Russia

    A. O. Bol’shikh, O. I. Tsybin, M. A. Bol’shikh, O. G. Kuznetsova & A. M. Levin

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  1. A. O. Bol’shikh
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  2. O. I. Tsybin
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  3. M. A. Bol’shikh
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  4. O. G. Kuznetsova
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  5. A. M. Levin
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Correspondence to A. O. Bol’shikh.

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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. Substantiation of the Possibility to Organize a Complex Two-Stage Sulfuric Acid Leaching Technology for Pyrrhotine Middlings. Russ. Metall. 2021, 1–6 (2021). https://doi.org/10.1134/S0036029521010031

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  • DOI: https://doi.org/10.1134/S0036029521010031

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