Nickel ore dispersion evaluation and consequences in flotation process.
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2016
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Abstract
Nickel ore dispersion before flotation using different reagents was investigated on a bench scale
to improve metallurgical recovery and selectivity. The nickel ore had a content of 0.8 pct nickel
and 14.5 pct MgO. A positive linear correlation between MgO and Ni was found. Carboxy
methyl cellulose, both pure and combined with Na2CO3, was the best dispersant used. The most
efficient collector was potassium amyl xanthate combined with mercaptobenzothiazole, and the
addition of xanthate was decisive for this good result because it is normally more stable in the
pH range used in the tests. A pH change from 7 to 9 resulted in a metal recovery increase of
49.3 pct, together with an increase of 6.25 pct of MgO in the concentrate.
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SÃO JOSÉ, F. de et al. Nickel ore dispersion evaluation and consequences in flotation process. Metallurgical and Materials Transactions. B, Process Metallurgy and Materials Processing Science, v. 46, n. 2, p. 899-904, abr. 2016. Disponível em: <https://link.springer.com/article/10.1007/s11663-015-0562-0>. Acesso em: 10 jul .2017.