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塞浦路斯·锡里特公司有16台直径5.03m,长5.8m的一段球磨机。每台球磨机均与一组旋流器构成闭路回路。在采用840mm的旋流器之前,每台球磨机与一组(5台)660mm的旋流器一起作业——4台作业,一台备用。在此布局中,球磨机处理能力为8.85万t/d。浮选给矿平均为25.9%+214μm。660mm旋流器作业的入口压力一般为34kPa,低于生产厂推荐的55kPa的入口压力。此回路一般处理固体含量大于40%的旋流器溢流,以获得所需的处理量。这导致了旋流器的作业效率较低并使过量的粗颗粒流入浮选。沉砂口堵塞频繁。曾试验过较大直径的沉砂口,但均降低了分级效率并导致循环负荷大于800%。用几组(3台一组)840m的旋流器取代660mm的旋流器——两台旋流器作业,一台备用。目前磨机的处理量为9.55万t/d。浮选给矿平均为26%+212mm。旋流器需进行更换,以避免旋流器成为磨矿回路中的影响因素。此项目还是将磨机处理量提高到10万t/d的一部分。对破碎厂进行了改进,对磨机和破碎机控制仪器进行现代化处理。现在在处理量改善的情况下,也可以保证颗粒粒度和铜回收率。旋流器改进后,磨矿回路的处理量约提高35%。实事上,增加产量中的50%是因为采用了840mm的旋流器。此外,由于旋流器数量从64台减少到32台,因此也减少了维修量。
Cyprus Silit company has 16 diameter 5.03m, 5.8m long section of the ball mill. Each ball mill with a group of cyclone form a closed loop. Prior to using the 840mm cyclone, each ball mill operated with a set of (five) 660mm cyclones - four jobs and one backup. In this layout, ball mill processing capacity of 88,500 t / d. The flotation feed averaged 25.9% + 214μm. The inlet pressure for 660 mm cyclone operation is typically 34 kPa, which is below the inlet pressure recommended by the manufacturer of 55 kPa. This circuit normally handles swirler overflow with a solids content of greater than 40% to achieve the desired throughput. This results in less efficient operation of the cyclone and excess amounts of coarse particles into the flotation. Grit mouth blocked frequently. Larger diameter grit nozzles have been tested, but both reduce the classification efficiency and result in cycle loads greater than 800%. Replacing the 660mm Cyclone with a few sets (3 sets) of 840m Cyclones - Two Cyclone jobs, one for backup. The current mill processing capacity of 95,500 t / d. The flotation feed averaged 26% + 212mm. The cyclone needs to be replaced to avoid the cyclone becoming a factor in the grinding circuit. This project is also part of the mill capacity increased to 100,000 t / d. The crushing plant was improved to modernize the mill and crusher control equipment. Now with improved throughput, grain size and copper recovery are also guaranteed. After the improvement of the cyclone, the processing volume of the grinding circuit is increased by about 35%. In fact, increasing production by 50% is due to the use of a 840mm cyclone. In addition, as the number of cyclones decreased from 64 to 32, the amount of repairs was also reduced.