Nickel Ore Dispersion Evaluation and Consequences in Flotation Process

作者：Jose Fabio De Sao^*; Imbelloni Alaine Moreira; Nogueira Francielle Camara; Pereira Carlos Alberto

来源：Metallurgical and Materials Transactions B-Process Metallurgy and Materials Processing Science, 2016, 47(2): 899-904.

DOI：10.1007/s11663-015-0562-0

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.

• 出版日期2016-4