最近一些有关助磨剂研究的论文表明,在高浓度湿式球磨中,聚合物助磨剂能有效地改变矿浆的流变特性,提高磨矿速度,增加细粒产量,但单位能耗仍维持原样。我们的试验表明,存在一个临界矿浆粘度,在此临界值之上,磨矿介质附于筒体上作离心运转,这时磨机能耗减少,并产生少量细粒。聚合物添加剂可以把矿浆粘度保持在临界值以下,使钢球不产生离心运转,使能量得到充分利用。通过分析磨机内钢球所受的力场,可以估算临界粘度,其结果与实验相符。 Recent papers on grinding aids show that polymer grinding aids can effectively modify the rheological properties of the pulp, increase the speed of grinding, and increase the yield of fine grains in high-concentration wet ball mills, but the unit energy consumption remains the same . Our tests show that there is a critical slurry viscosity above which the grinding medium is attached to the drum and centrifuged. At this point the mill consumes less energy and produces a smaller amount of fine particles. Polymer additives can maintain the viscosity of the slurry below the critical value, so that the ball does not produce centrifugal operation, so that energy can be fully utilized. By analyzing the force field of the ball in the mill, the critical viscosity can be estimated and the result is consistent with the experiment.