我厂原设计磨矿流程为一段磨矿二次分级。为提高磨矿处理量和磨矿细度,1983年3月我们将两个小系统合并为一个大系统,磨矿工艺改为阶段磨矿,相应将2台φ500旋流器改为2台φ600旋流器,两段分级机溢流仍用6PS砂泵直接输入旋流器。由于6PS砂泵流量有限,造成砂泵池溢矿浆。为此,一、二段分级机采用高浓度(65—75％)分级,但 I plant the original design grinding process for a second grade grinding. In order to improve the grinding capacity and grinding fineness, we merged two small systems into a large system in March 1983 and changed the grinding process to the stage of grinding. Correspondingly, the two φ500 cyclones were changed into two φ600 Cyclone, two-stage grading machine overflow still use 6PS sand pump directly into the cyclone. Due to the limited flow of 6PS sand pump, resulting sand tank overflow slurry. To this end, the first and second classifier using high concentration (65-75%) classification, but