The interaction of xanthates and amines with pyroxene activated by copper and nickel

被引：5
|
作者：
O'Connor, C. T.
Malysiak, V.
Shackleton, N. J.
机构：
[1] Univ Cape Town, Min Proc Res Unit, Dept Chem Engn, ZA-7701 Cape Town, South Africa
[2] Anglo Platinum Res Ctr, ZA-1412 Homestead, South Africa
来源：
MINERALS ENGINEERING | 2006年 / 19卷 / 6-8期
关键词：
flotation activators; precious metal ores;
D O I：
10.1016/j.mineng.2005.09.040
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
In the flotation of platinum group minerals pyroxene is a major gangue mineral. This study shows using zeta potential and ToF-SIMS analyses that when pyroxene is exposed to copper, nickel and/or calcium ions in solution at alkaline pHs a surface reaction occurs between the hydroxy species, in the case of copper and nickel, or divalent calcium ions and the pyroxene surface which influences the floatability of the pyroxene. Following exposure to copper and nickel ions at pH 9 addition of SIBX resulted in the pyroxene floating readily. It is also shown. in the case of copper, that the activating effect of the adsorbed copper hydroxy species can be reduced by the addition of complexing amines prior to SIBX. Proposals are made to explain these observations. (C) 2005 Elsevier Ltd. All rights reserved.
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页码：799 / 806
页数：8
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