Ca^(2+)、Mg^(2+)对黑钨矿选择性絮凝的影响及其机理研究

EFFECTS OF Ca^2+ AND Mg^2+ ON SELECTIVE FLOCCULATION OF WOLFRAMITE AND ITS MECHANISM

矿浆中Ｃａ２＋、Ｍｇ２＋的含量显著影响黑钨矿选择性絮凝效果。研究结果表明，Ｃａ２＋、Ｍｇ２＋均是通过降低颗粒表面ζ电位而使微细矿粒之间产生凝聚或互凝，添加适量的Ｎａ２ＣＯ３可克服矿浆中Ｃａ２＋、Ｍｇ２＋的不良影响。在配水中，以ＦＤ为絮凝剂、（ＮａＰＯ３）６为分散剂，可实现黑钨矿与４种脉石矿物人工混合矿的分离。

Selective flocculation of wolframite is considerably influenced by the content of Ca^2+ and Mg^2+ in pulp.Research results show that,both Ca^2+ and Mg^2+ can lower the Zetapotential on the surface of particles and cause the coagulation among fine particles.The bad effects of Ca^2+ and Mg^2+ in pulp can be overcome by adding the right amount of Na_2CO_3.In the condition of FD used as flocculant and (NaPO_3)_6 as dispersant,wolframite can be separated from four kinds of gangue minerals in mixed water.