铜钼分离浮选新型抑制剂CMSD的作用机理

Action Mechanism of a New Inhibitor CMSD for Chalcopyrite and Molybdenite Separation Flotation

CMSD是以硫化钠和硫氢化钠为主要原料制备的一种新型铜钼分离浮选抑制剂。以黄铜矿和辉钼矿单矿物为对象,采用红外光谱分析和量子力学计算方法研究了CMSD的抑制作用机制。结果表明:CMSD在黄铜矿(112)面和(101)面发生化学吸附,在辉钼矿(001)面不发生化学吸附;CMSD在黄铜矿(112)面和(101)面上的吸附是通过CMSD中的HS-同时与这2个晶面上的Cu、Fe原子作用完成的;CMSD对黄铜矿的抑制是利用HS-吸附在黄铜矿的表面,降低黄铜矿的表面能,影响混合烃油在黄铜矿表面的吸附,从而降低黄铜矿的浮游性而实现的。

CMSD is a new inhibitor for chalcopyrite and molybdenite separation flotation,which is made from sodium sulfide and sodium hydrosulfide as the main raw material. The infrared spectroscopy detection method and the first-principle calculation method based on density functional theory（ DFT） were used for studying the action mechanism of CMSD on chalcopyrite and molybdenite. The results showed that chemical adsorption occurred on chalcopyrite（ 112） and（ 101） surface of CMSD,and didn＇t occur on molybdenite（ 001） surface. The adsorption of CMSD on chalcopyrite（ 112） and（ 101） surface is accomplished through HS-concurrently interacting with Fe atom and Cu atom in two crystal surface. The inhibition of CMSD on chalcopyrite is accomplished through HS-adsorbs on chalcopyrite surface,to reduce the surface free energy of chalcopyrite,affect the adsorption of mixing hydrocarbon oil on chalcopyrite,thus reducing the floatability of chalcopyrite.