The Effect of Thiosulfate Ions on the Flotation Behaviour of PdBiTe
Mineralogical studies indicate the Pt-Pd-Bi-Te class to react poorly on the flotation stimuli and indications are that these minerals are slow floaters. However, recent studies performed on a number of minerals from this class indicated strong interactions with potassium ethyl xanthate resulting in the formation of dixanthogen (only one of several xanthate species). The poor flotation response is not a result of poor interaction of xanthate with the surface. It is proposed that the oxidation products of sulfides in the process water interact with the PGM surface. To test this, the effect of thiosulfate (an important oxidation product of sulfides) was investigated by employing electrochemical measurements and FTIR spectroscopy. The electrochemical investigations indicate no strong effect of thiosulfate on the interaction of xanthate with the minerals surface as well as the reduction of oxygen-thiosulfate is likely not responsible for the poor flotation response of these minerals in industrial plants.
J. A. Venter M. K. G. Vermaak
Exxaro Resources Limited, South Africa Dept of Materials Science and Metallurgical Engineering, University of Pretoria, South Africa
国际会议
XXIV International Mineral Processing Congress(第24届国际矿物加工大会)
北京
英文
1064-1067
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）