矸石泥化性质对煤泥水沉降性能的影响

以沙曲矿4号煤层的顶、底板样品为研究对象,通过X-射线衍射和安氏泥化试验对样品性质进行了分析,结果表明:顶、底板样品所含物相基本相同,主要是石英、高岭石和蒙脱石;二者的泥化比均较高,影响煤泥水系统的处理效果。以聚丙烯酰胺(PAM)为絮凝剂、聚合氯化铝(PAC)为凝聚剂,探讨了药剂用量、配比和添加方式等对煤泥水沉降性能的影响。结果表明:凝聚剂和絮凝剂的联合作用可提高颗粒沉降速度,降低上清液浊度,改善颗粒沉降效果,絮凝剂与凝聚剂的用量比以1∶13～1∶20较为适宜;底板样品颗粒沉降性能明显比顶板样品差;针对泥化严重的底板样品,絮凝剂按1∶2的比例分段添加,煤泥水沉降效果最好,颗粒沉降速度达到21.6 m/h,比絮凝剂集中添加时的沉降速度提高了近70%,上清液浊度和沉淀物体积相对最小。

Influence of gangue argillization on settlement of slime water

Analyse the properties of roof and floor rock of No. 4 coal seam in Shaqu mine through X-ray diffraction and argillization experiment. The results show that the phases of these two rocks are basically same, which are quartz, kaolinite and montmorillonite, the serious argillization influences slime water treatment. Taking polyacrylamide as flocculant, polymeric aluminum as coagulant, investigate the influence of regulation of agent on settleability of slime water. The synergism of these two agent could improve setting velocity of particles and settlement effect, reduce the turbidity of supernatant, the suitable ratio of polyacrylamide and polymeric aluminum is between 1：13 and 1：20. The settleability of floor coal sample is worse than that of roof coal seam. The desired settlement of highly-argillized slime water can be obtainable by batching addition of flocculants according to the pro- portion of 1：2. Both the turbidity of supernatant and sediment volume are relatively small. The setting velocity could reach 21.6 m/h, nearly 70 percent more efficient than that when one-time adding coagulant.