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Metallurgist

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01-11-2012

Recycling tailings from nickel plants that process oxide ores by ammonia-carbonate technology

Authors: A. S. Medvedev, O. V. Sannikova

Published in: Metallurgist | Issue 7-8/2012

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Abstract

Hydrometallurgical methods were tested for recycling tailings (cakes) formed at nickel plants that process oxide nickel ores by ammonia-carbonate technology. Certain plants – in particular, the Nicaro (Cuba) plant – have accumulated tens of millions of tons of tailings containing up to 1% valuable components (Ni and Co). It is shown that sulfuric-acid leaching is the best variant for hydrometallurgical recycling of the tailings. The optimum leaching regimes are determined. The net amount of nickel and cobalt recovered from the tailings as a commercial product (a collective nickel-cobalt concentrate) is 85–86%. Most of the sulfuric acid that is used can be regenerated by the steam hydrolysis of ferrous sulfate.

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Title: Recycling tailings from nickel plants that process oxide ores by ammonia-carbonate technology
Authors: A. S. Medvedev
O. V. Sannikova
Publication date: 01-11-2012
Publisher: Springer US
Published in: Metallurgist / Issue 7-8/2012
Print ISSN: 0026-0894
Electronic ISSN: 1573-8892
DOI: https://doi.org/10.1007/s11015-012-9611-y

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