方铅矿新型抑制剂BK508C作用机理研究

Study on the Action Mechanism of a New Depressant BK508C for Galena

针对钼铅分离过程使用磷诺克斯抑铅浮钼存在毒性大、污染严重等问题,开展了新型环保型抑制剂BK508C替代磷诺克斯试验研究。采用单矿物和人工混合矿浮选试验的方法研究了BK508C对辉钼矿与方铅矿浮选行为的影响,并通过分子模拟、接触角测试、吸附量测定和红外光谱分析等方法研究其作用机理。单矿物浮选试验采用用量为12.5mg/L的BK508C可使方铅矿的回收率从95%以上降至10.82%,人工混矿分离试验分离系数达到6.32,分离效果高于磷诺克斯,说明BK508C可以替代磷诺克斯试剂实现钼铅分离。机理研究表明,BK508C与Pb2+以1︰1配位方式形成络合物,化学吸附在方铅矿表面,在辉钼矿表面吸附较弱,可以实现选择性抑铅浮钼。

In view of the problems of high toxicity and serious pollution in the process of molybdenum-lead separation by using phosphonox to suppress lead and float molybdenum,the experimental study on replacing phosphonox with new environment-friendly depressant BK508C was carried out.The effect of BK508C on the flotation behavior of molybdenite and galena was studied by single mineral and artificial mixed mineral flotation tests,and the mechanism was studied by molecular simulation,contact angle test,adsorption measurement and infrared spectroscopy analysis.The recovery of galena can be reduced from 95%to 10.82%when the dosage of BK508C was 12.5 mg/L in the single mineral flotation test,and the separation coefficient of artificial mixed ore separation test was 6.32,which was higher than that of phosphonox,indicating that BK508C can replace phosphonox reagent to realize the separation of molybdenum and lead.The mechanism study showed that BK508C and Pb^(2+)form a complex in a 1:1 coordination mode,and the complex was chemically adsorbed on the surface of galena,and the adsorption on the surface of molybdenite was weak,so that the selective lead suppression and molybdenum flotation can be realized.