中国有色金属学报(英文版), 2017, 27(1): 204-210.
10.1016/S1003-6326(17)60023-2
通过控制矿浆pH值和添加表面活性剂，实现微细粒磁铁矿在镍黄铁矿表面选择性粘附而使其表面磁性增强。结果表明，在pH=8.8时，添加六偏磷酸钠(用量为100 g/t)、油酸(用量为4.5 L/t)和煤油(用量为4.5 L/t)后，微细磁铁矿选择性粘附在镍黄铁矿表面，使其磁性增强；而蛇纹石表面几乎不被磁铁矿粘附。然后，在磁场强度为200 kA/m条件下磁选，实现了二者的良好分离。扫描电镜结果也进一步证实了微细粒磁铁矿在镍黄铁矿表面发生了选择性粘附，而蛇纹石表面未观察到磁铁矿的存在。Zeta电位测试和扩展DLVO理论计算结果表明，添加表面活性剂后，磁铁矿和镍黄铁矿颗粒间存在很强的吸引作用，从而使微细粒磁铁矿选择性粘附在镍黄铁矿表面，增强了其表面磁性。
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