细粒滑石对孔雀石硫化浮选的影响

Effect of Fine Talc on Sulfurized Flotation of Malachite

通过浮选试验发现细粒滑石的加入降低了孔雀石的硫化浮选可浮性,细粒滑石含量越多,对孔雀石的可浮性影响越大;通过Zeta电位测试、吸附量测试、SEM-EDS分析和EDLVO理论计算研究分析了细粒滑石影响孔雀石硫化浮选的原因.结果表明:适量的Na_( 2)S在孔雀石矿物表面的吸附是其硫化-黄药浮选成功的关键,而细粒滑石会吸附罩盖在孔雀石矿物表面,且滑石矿物表面不会发生Na_( 2)S的吸附,因此,细粒滑石减弱了孔雀石矿物表面的硫化效果,使其可浮性降低.

It is found that the addition of fine-grained talc reduces the floatability of malachite on sulfurized flotation by flotation test,and the higher the content of fine-grained talc,the greater the influence on the floatability of malachite.Zeta potential measurements,adsorption tests,SEM-EDS test and EDLVO theory calculation illustrated the reason for the influence of fine-grained talc on sulfurized flotation of malachite.The results show that the adsorption of appropriate amount of Na_( 2)S on the surface of malachite is the key to the success of sulfidization-xanthate flotation.The fine-grained talc adsorbs on the surface of malachite,and the adsorption of Na_( 2)S doesn’t occur on the surface of talc.Therefore,the fine-grained talc weakens the effect of sulfidization on the surface of malachite and reduces the floatability of malachite.