永平铜矿从加拿大引进二台φ5.03×6.4米溢流型球磨机,日处理原矿5千吨。最初运转球磨跑粗现象严重,经分析给料粒度偏粗,补加球径偏小,充填率和磨矿浓度过低是重要原因。为此,该矿严格按照设计要求办事,并修改了工艺操作要求,如调整补加大直径钢球,将球充填率从30％提高到40％;将磨矿浓度提高到75—80％;这些措施使球磨机处理提高了20—30％,—200目达到了65％的设计要求。另外,在磨矿回路中采用旋流器分级比采用螺旋分级机的分级效果好。高浓度磨矿要严格控制加水量,在原矿 Yongping Copper Mine imported from Canada two φ5.03 × 6.4 meters overflow ball mill, processing 5,000 tons of ore. The initial running ball mill running coarse phenomenon, the analysis of coarse feed particle size, add a smaller diameter, filling rate and grinding concentration is too low is an important reason. To this end, the mine strictly in accordance with the design requirements and modify the process operation requirements, such as adjusting the additional large diameter ball, the ball filling rate from 30% to 40%; the grinding concentration increased to 75-80%; These measures have resulted in a 20-30% increase in ball mill handling and - a 200% design requirement of 65%. In addition, the use of cyclone grading in the grinding circuit grading than spiral grading machine classification effect. High concentration of grinding to strictly control the amount of water, in the ore