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位于南非著名的布什维尔德杂岩北部的Platreef矿床含有很高浓度铂族元素(PGE),铂族元素存在于碲化物矿物中(约含20%~45%铂族金属)。含铂族元素的碲化物矿物为铋钯铂碲矿(moncheite)(Pt,Pd)(Bi,Te)2和PtTe2)和铋铂钯碲矿(merenskyite)((Pd,Pt)(Bi,Te)2和PdTe2)。研究结果表明,这些矿物可能进入浮选尾矿中。本研究的目的是确定它们的可浮性及其与矿物表面性质的关系。用微量浮选试验、Zeta电位测定、ToF-SIMS(飞行时间二次离子质谱)、X射线光电子能谱(XPS)研究了人工合成的这类矿物的表面性质及其可浮性。硫酸铜的添加降低了铋钯铂碲矿和铋铂钯碲矿的可浮性,而黄药的添加提高了矿物的可浮性。在只添加黄药时,黄药在矿物表面上的吸附量比添加硫酸铜后要高些。氧化过程对含有铋的铂族金属碲化物矿物的可浮性有负面影响,而不影响不含铋的铂族金属(Pt和Pd)的碲化物矿物。细磨降低了矿物的浮选回收率。浮选用水中的钙离子浓度从80.10-6提高500.10-6对PdTe2矿物的可浮性没有负面影响。
The Platreef deposit, located in the northern part of South Africa’s prevalent Bushwild block, contains a very high concentration of platinum group elements (PGEs), which are present in telluride minerals (about 20-45% platinum group metals). The telluride metal containing platinum group elements is a moncheite (Pt, Pd) (Bi, Te) 2 and PtTe2) and a bismuth platinum (merenskyite) (Pd, Pt ) 2 and PdTe2). The results show that these minerals may enter the flotation tailings. The purpose of this study is to determine their floatability and its relationship with the surface properties of minerals. The surface properties and floatability of artificially synthesized minerals were studied by using trace flotation, Zeta potential, ToF-SIMS and XPS. The addition of copper sulfate reduced the floatability of bismuth palladium-platinum-tellurite and bismuth-platinum-palladium-tellurite, while the addition of xanthate improved the floatability of minerals. When only xanthate was added, xanthate adsorption on the mineral surface was higher than after copper sulfate addition. The oxidation process negatively affects the buoyancy of the platinum group metal telluride minerals containing bismuth without affecting the telluride minerals of the platinum group metals (Pt and Pd) that do not contain bismuth. Fine grinding reduces mineral flotation recovery. Calcium ion concentration in flotation water increases from 80.10-6 500.10-6 No negative effect on the floatability of PdTe2 minerals.