高压辊磨机操作因素对粉碎产品粒度特性的影响

Effect of Operating Factors of High Pressure Grinding Roll on Size of Crushed Product

采用高压辊磨机破碎贫赤铁矿,分别研究了辊面速度、辊面压力、矿石含水率等操作因素对中料和边料产品粒度特性的影响.结果表明:增加辊面压力,中料和边料产品粒度变细,中料产品粒度分布更加集中,边料产品粒度分布更加均匀;提升一定的辊面速度,中料产品粒度变细,粒度分布更加集中,继续提升辊面速度,中料产品粒度特性无明显变化,辊面速度变化对边料产品粒度特性影响不明显;提高给料矿石的含水率,中料和边料产品细度变化不明显,中料产品粒度分布更加集中,边料产品粒度分布更加均匀.

Low-purity hematite was crushed with high pressure grinding roll,and effects of operating factors such as roller surface pressure and speed,and ore moisture content on size of crashed products were studied.With the increase of roller surface pressure,the overall size became smaller,and size of products crushed in the roller center was distributed more concentratedly,while at the roller edge was more evenly.The products in the center became finer when the roller speed was increased into certain range,however,if further accelerating speed,no size change was observed.Roller speed had no obvious effect on the product size at edge.When the ore moisture content was increased,no obvious change was detected in product fineness.The product size distribution in the center was more concentrated,while at the edge it was more even.