酸化水玻璃对重晶石与白云石浮选分离行为的影响

The Effect of Acidized Sodium Silicate on Flotation Separation Behavior of Barite and Dolomite

通过单矿物浮选、接触角测量、浮选溶液化学计算、Zeta电位测试等手段研究了不同酸化程度的水玻璃对重晶石与白云石可浮性的影响以及其可能的作用原理。浮选结果表明:酸化程度为1的水玻璃(TS11)可以很好地抑制白云石的上浮,而对重晶石的可浮性影响较小。机理研究结果显示:在十二烷基磺酸钠浮选体系下,TS11水解生成具有很强亲水性的硅酸胶粒Si(OH)_(4)与白云石表面的Ca^(2+)发生较强的化学吸附,并通过竞争吸附挤走吸附在白云石表面的C_(12)H_(25)OSO_(3)^(-)导致白云石的可浮性急剧降低,但因其难以在重晶石表面大量吸附导致重晶石的可浮性改变不大,表明TS11具有良好的选择性抑制作用。

Effects of different degree of acidification water glass on the floatability of barite and dolomite as well as its possible principle of action were studied by means of single mineral flotation,solution chemical calculation,Zeta potential test and infrared spectroscopy.The flotation results indicate that:dolomite can be well suppressed and barite floatability is less affected by acidification degree of 1 water glass(TS11).Mechanism study results show that:under the sodium dodecyl sulfonate flotation system,TS11 hydrolysis generation a strong hydrophilic silicate particles Si(OH)_(4) with the dolomite surface Ca^(2+) occurs strong chemical adsorption,and squeeze C_(12)H_(25)OSO_(3)^(-) which adsorbed on the surface of dolomite through competitive adsorption,resulting in a sharp reduction in the floatability of dolomite,but it is difficult to adsorb on the surface of barite,so TS11 has a good selective inhibition.