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Pt-Te2和Pt-Bi-Te是蚀变的铂矿石中经常发现的两种重要含铂矿物。矿物学研究表明,Pt-Pd-Bi-Te属于可浮性较差的矿物,并且很多迹象表明这些矿物浮选速度都很慢。本文应用电化学控制的接触角测定法、富里叶变换红外光谱和伏安测量法,研究了乙基钾黄药与这些矿物的相互作用。这些电化学试验结果揭示了,在四硼酸钠(Na2B4O7)溶液中,在电位低于300mV(相对标准氢电极电位)的条件下,Pt-Te2是一种比Pt-Bi-Te更不易起化学作用的矿物,并且在Pt-Bi-Te回程扫描过程中观测到的还原峰,主要是与铋的氧化产品的还原作用有关。在含有1.10-310mol/L乙基钾黄药和0.05mol/L Na2B4O7溶液中,在0.3V(相对标准氢电极电位)的电位下极化时,这两种矿物都显示出提高了阳极电流。根据静止电位测定结果;形成双黄药从热力学来看应该是有利的,并且很高的静止电位被认为是由铂对氧的还原反应的催化作用而引起的。在这两种矿物上形成双黄药已由非原地富里叶变换红外光谱得到证实。接触角测定揭示了Pt-Bi-Te表面已具有疏水性,而在Pt-Te2表面上则测得了较小的接触角。这种矿物的表面粗糙性可能是决定着很小接触角的主要原因。
Pt-Te2 and Pt-Bi-Te are two important platinum-containing minerals that are frequently found in altered platinum ores. Mineralogical studies have shown that Pt-Pd-Bi-Te is a poorly floatability mineral and many indications are that these minerals are slow to float. In this paper, electrochemical contact angle measurement, Fourier transform infrared spectroscopy and voltammetry were used to study the interaction between potassium ethylxanthate and these minerals. These electrochemical test results reveal that Pt-Te2 is a less potent chemical than Pt-Bi-Te in solutions of sodium tetraborate (Na2B4O7) at potentials below 300 mV (vs. standard hydrogen electrode potentials) The role of the minerals, and Pt-Bi-Te back-scan scan observed during the reduction peak, mainly with the reduction of oxidation of bismuth products. Both of these minerals showed an increased anode current when polarized at a potential of 0.3 V (relative standard hydrogen electrode potential) in a solution containing 1.10-310 mol / L ethylpotassium and 0.05 mol / L Na2B4O7. The determination of the resting potentials; the formation of the bi-xanthate should be thermodynamically favorable, and the high resting potential is believed to be caused by the catalytic action of platinum on the reduction of oxygen. The formation of xanthones on these two minerals has been confirmed by non-native Fourier transform infrared spectroscopy. Contact angle measurements revealed that the Pt-Bi-Te surface was already hydrophobic and a smaller contact angle was measured on the Pt-Te2 surface. The surface roughness of this mineral may be the main reason that determines very small contact angles.