A comparison of pyrrhotite rejection and passivation in two nickel ores

被引：17

作者：

Chimbganda, T. ^{[1
]}

Becker, M. ^{[1
]}

Broadhurst, J. L. ^{[1
]}

Harrison, S. T. L. ^{[1
]}

Franzidis, J. -P. ^{[1
]}

机构：

[1] Univ Cape Town, Dept Chem Engn, Minerals Met Initiat, ZA-7701 Rondebosch, South Africa

来源：

MINERALS ENGINEERING | 2013年 / 46-47卷

基金：

新加坡国家研究基金会;

关键词：

Acid rock drainage; Pyrrhotite rejection; Pyrrhotite passivation; Polyethylene polyamines; X-RAY PHOTOELECTRON; DEPRESSION MECHANISM; SULFIDE MINERALS; PYRITE OXIDATION; PH; 9.3; PENTLANDITE; FLOTATION; IRON; SURFACES;

D O I：

10.1016/j.mineng.2013.03.031

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The non-stoichiometric sulfide mineral pyrrhotite (Fel-xS) occurs almost ubiquitously inter-grown with the principal nickel mineral, pentlandite ((Fe,Ni)9S8). During Ni processing, pyrrhotite is generally rejected to the tailings stream by flotation to produce a low tonnage, high grade (Ni) smelter feed and reduce SO2 emissions. In this study, the effect of different pyrrhotite flotation rejection strategies (artificial oxidation and TETA: SMBS addition) are evaluated on a magnetic (Ore A) and non-magnetic (Ore B) pyrrhotite ore to determine if either may effectively depress and potentially passivate the pyrrhotite surface during flotation to produce benign tailings without compromising pentlandite recovery. For both ores, the best pyrrhotite rejection (pentlandite/pyrrhotite recovery) was obtained using TETA: SMBS. Differences in the flotation performance of the two ores are considered more a function of BMS content, liberation and ore handling rather than a difference in sulfide passivation from the inherent pyrrhotite mineralogy (magnetic vs non-magnetic pyrrhotite). Pyrrhotite passivation could possibly provide a means of rendering the tailings non-reactive and thus mitigate acid rock drainage (ARD) formation. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：38 / 44

页数：7

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