硫化镍矿石的选别,常常受脉石中所含蛇纹岩矿物的干扰。研究了蛇纹岩矿物如纤蛇纹石和蛇纹石矿泥的覆盖对未被氧化的镍黄铁矿浮选影响。此外,还曾使用在pH9时以戊基黄原酸钾为捕收剂的微型浮选试验、电泳和电子显微镜扫描。发现矿泥覆盖层的形成与矿泥和硫化矿表面电荷有直接关系。添加改变矿泥表面电荷的化学药剂,如羧基甲基纤维素、糊精、焦磷酸盐和水玻璃,可有效地减少矿泥对镍黄铁矿浮选的有害影响。 The sorting of nickel sulphide ore is often disturbed by serpentinite minerals contained in the gangue. The influence of serpentinite minerals such as chrysotile and serpentine slime on the flotation of unoxidized pentlandite was investigated. In addition, micro-flotation tests using sodium pentylxanthate as a collector at pH 9, electrophoresis and electron microscopy have also been used. It is found that the formation of the overburden is directly related to the surface charge of the ore and sulphide ore. The addition of chemicals that alter the surface charge of the sludge, such as carboxymethylcellulose, dextrin, pyrophosphate and waterglass, can effectively reduce the detrimental effects of slime on the flotation of pentlandite.