蛇纹石与滑石的同步抑制原理

通过浮选试验、沉降实验、Zeta电位测试和吸附量测试,研究以六偏磷酸钠和古尔胶为调整剂时,蛇纹石和滑石的同步抑制及其机理。结果表明:在较宽pH范围内,蛇纹石与滑石颗粒表面电性相反,易发生异相凝聚,使得硫化矿浮选的降镁难度增大;六偏磷酸钠和古尔胶的组合使用能较好地同步抑制蛇纹石和滑石,实现与黄铁矿的人工混合矿分离;六偏磷酸钠使得蛇纹石颗粒表面动电位由正变负,蛇纹石与滑石颗粒间分散,从而提高古尔胶在滑石表面的吸附量。研究并提出对蛇纹石和滑石的混合镁硅酸盐矿物应是首先消除颗粒间的异相凝聚,再抑制易浮矿物的同步抑制原理。

Sync-suppression principle of serpentine and talc

Using sodium hexametaphosphate and guar gum as regulators,the sync suppression and mechanism of serpentine and talc were studied by flotation tests,sedimentation tests,Zeta potential measurements and adsorption measurements.The results show that the surface potential of serpentine and talc particles is contrast in a wide pH range,leading to heteroaggregation between the serpentine and talc particles,which makes lowing magnesium in sulfide ore flotation process difficult.The serpentine and talc is sync suppressed and separated from the artificial mixed mineral of pyrite with sodium hexametaphosphate and guar gum.Sodium hexametaphosphate makes the surface potential of serpentine particles from the positive into negative,which results in serpentine and talc particles dispersing and the adsorption of guar gum on talc surface increasing.The sync suppression principle is that heteroaggregation between the serpentine and talc particles should be eliminated firstly,then depress the easy floating minerals.