Impact of oxidation on flotation of Ni-Cu sulphide ore with respect to grinding

被引：9
|
作者：
Nanthakumar, B. [1 ]
Kelebek, S. [1 ]
Katsabanis, P. [1 ]
机构：
[1] Queens Univ, Dept Min Engn, Kingston, ON K7L 3N6, Canada
来源：
TRANSACTIONS OF THE INSTITUTIONS OF MINING AND METALLURGY SECTION C-MINERAL PROCESSING AND EXTRACTIVE METALLURGY | 2007年 / 116卷 / 03期
基金：
加拿大自然科学与工程研究理事会;
关键词：
Oxidation; Flotation; Pentlandite; Pyrrhotite; Selectivity; Nickel losses;
D O I：
10.1179/174328507X198645
中图分类号：
TD [矿业工程];
学科分类号：
0819 ;
摘要：
Impact of oxidation on the flotation of a complex Ni-Cu sulphide has been investigated using two approaches. In the first approach, the samples to be floated were allowed to oxidise before grinding while in the second approach they were allowed to oxidise after grinding. Their flotation characteristics were examined with reference to behaviour of a fresh ore sample. Oxidation before or after grinding has produced an inferior nickel grade-recovery performance. However, the latter case has induced a much greater adverse effect associated with several times more nickel losses and poorer selectivity between pentlandite and pyrrhotite. This was due to over oxidation of part of pentlandite and more importantly enhanced flotation of pyrrhotite which is related to metal ion activation and elemental sulphur formation. Oxidation characteristics of samples in each category are discussed in terms of pH, redox and conductivity behaviour that are utilised for correlations with flotation performance.
引用
收藏
页码：197 / 206
页数：10
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