无捕收剂浮选的电化学及量子化学研究

ELECTROCHEMISTRY AND QUANTUM CHEMISTRY IN COLLECTOR—FREE FLOTATION

本文给出了有无硫化钠存在时。黄铜矿和黄铁矿的无捕收剂浮进行为。研究表明,黄铜矿自诱导浮选良好,有较宽的电位和pH范围;弱酸性和碱性介质中,黄铁矿自诱导浮选较差,没有电位范围。硫化钠的添加,明显促进了黄铁矿的无捕收剂浮选,黄铁矿有良好的硫化钠诱导浮选。对天然矿石验证试验表明,自诱导浮选技术能够有效分离黄铜矿和黄铁矿。通过HS^-离子吸附量的测定,矿物表面中性硫量提取分析、电化学测试和量子化学计算,较详细研究了黄铜矿和黄铁矿无捕收剂浮选的机理,矿物表面中性硫是主要疏水体。

This paper describes the behaviour of chalcopyrite and pyrite in collectorfree flotation in the presence or absence of sodium sulphide. The experiment investigation shows that chalcopyrite has good self-inducing flotability and a wider range of potential and pH, and in weak acid or alkaline medium pyrite has poorer self-inducing flotability and no range of potential. Additions of sodium sulphide can promote greatly the collector-free flotation of pyrite, showing sodium sulphide has good induced effect on pyrite flotation. The confirmatory test of the natural ores shows that the technique can be used for effectively separating chalcopyrite from pyrite. A detailed description is given of the mechanism of collector-free flotation of chalcopyrite and pyrite.