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Dissolution behavior of Caldag lateritic nickel ore subjected to a sequential organic acid leaching method

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Abstract

The dissolution behavior of Caldag lateritic nickel ore subjected to a sequential organic acid leaching method was investigated. The effects of the type of organic acid, acid concentration, leaching time, and leaching temperature on the lateritic nickel ore were examined. Organic acids were used individually prior to sequential leaching. Citric acid was more effective than the other two acids for the selective leaching of nickel and cobalt. An increase in the citric acid concentration negligibly affected the dissolution of the metals, whereas temperature exhibited a strong beneficial effect. Oxalic acid was determined to be the most appropriate organic acid for the second leaching step. After 8 h (4 h + 4 h) of leaching with organic acids (0.5 M citric + 0.5 M oxalic) in sequence at 90°C, 89.63% Ni, 82.89% Co, and 69.63% Fe were leached from the lateritic nickel ore. A sequential citric + oxalic acid leaching method could represent a viable alternative for the dissolution of metals from lateritic nickel ore.

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  1. Department of Mining Engineering, Eskisehir Osmangazi University, Eskisehir, 26480, Turkey

    Sait Kursunoglu & Muammer Kaya

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  1. Sait Kursunoglu
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  2. Muammer Kaya
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Correspondence to Sait Kursunoglu.

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Kursunoglu, S., Kaya, M. Dissolution behavior of Caldag lateritic nickel ore subjected to a sequential organic acid leaching method. Int J Miner Metall Mater 22, 1131–1140 (2015). https://doi.org/10.1007/s12613-015-1177-9

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  • DOI: https://doi.org/10.1007/s12613-015-1177-9

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