Abstract

Talc processing starts with grinding followed by flotation. The flotation feed preparation significantly affects the concentrate quality. In this study, the preparation of talc flotation feed by grinding was investigated in the absence and presence of sodium dodecyl sulfonate (SDS), one of the well-known flotation reagents. The natural floatability of talc was compared to its floatability after adding the SDS in either grinding or flotation. The results proved a significant effect of grinding conditions on its natural floatability. The higher flotation recovery is achieved by grinding at the alkaline medium compared to the acidic medium at 30% solids. More interestingly, adding the SDS in flotation produced a higher talc recovery than that the achieved recovery by its flotation after adding SDS in grinding although it has more chance for mixing the reagent with particles and adsorption of SDS to talc particles. Thus, the tested variables in grinding tests negatively affect the SDS effectiveness as a flotation reagent for talc.

摘要

滑石加工从研磨开始，然后是浮选。浮选进料制备显着影响精矿质量。在这项研究中，研究了在不存在和存在十二烷基磺酸钠 (SDS)（一种众所周知的浮选试剂）的情况下通过研磨制备滑石浮选饲料的方法。将滑石的自然可漂浮性与其在研磨或浮选中添加 SDS 后的可漂浮性进行比较。结果证明研磨条件对其自然漂浮性有显着影响。与 30% 固体含量的酸性介质相比，在碱性介质中研磨可获得更高的浮选回收率。更有趣的是，在浮选中加入 SDS 的滑石回收率比在研磨中加入 SDS 后通过浮选获得的回收率更高，尽管它有更多的机会将试剂与颗粒混合以及 SDS 吸附到滑石颗粒上。因此，研磨试验中的测试变量对 SDS 作为滑石浮选试剂的有效性产生负面影响。