聚丙烯酸钠对蛇纹石浮选的影响及其机理

    Effect and Mechanism of Sodium Polyacrylate on Flotation of Serpentine

    • 摘要: 通过浮选实验、Zeta电位测试、红外光谱分析和SEM-EDS分析等方法,系统地研究了聚丙烯酸钠(PAAS)对蛇纹石浮选行为及其表面性质的影响,并探讨其机理。浮选结果表明,添加抑制剂聚丙烯酸钠能有效抑制蛇纹石上浮,在加入24.7 mg/L的聚丙烯酸钠后,蛇纹石的浮选回收率由36%下降到10%;Zeta电位测试结果表明,聚丙烯酸钠能够显著降低蛇纹石的表面电荷;红外光谱和SEM-EDS分析结果表明聚丙烯酸钠在蛇纹石表面有明显的化学吸附。机理研究分析表明,聚丙烯酸钠通过与蛇纹石表面上的Mg2+作用对蛇纹石产生絮凝作用,改变蛇纹石颗粒的分散状态,从而实现对蛇纹石颗粒的有效抑制。

       

      Abstract: Effect of sodium polyacrylate (PAAS) on the flotation and surface properties of serpentine was studied systematically by means of flotation test, Zeta potential test, Infrared spectral (IR) and SEM-EDS analysis. The flotation results showed that the addition of the depressant sodium polyacrylate could effectively depress the flotation of serpentine, and the recovery of serpentine decreased from 36% to 10% after the addition of 24.7 mg/L sodium polyacrylate. Zeta potential test results showed that sodium polyacrylate could significantly reduce the surface charge of serpentine.Infrared spectral (IR) and SEM-EDS analysis showed that sodium polyacrylate had obvious chemical adsorption on serpentine surface.The mechanism analysis shows that sodium polyacrylate can flocculate serpentine by interacting with the Mg2+ on the serpentine surface, and change the dispersion state of serpentine particles, thus effectively depressing the serpentine particles.

       

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