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釜石矿选矿厂处理铁矿石、铜铁矿石和铜矿石。选矿厂耗电量占矿山总耗电量的73%。选矿厂为了降低电耗,在不降低选矿指标的前提下,把实际作业中的20.4转/分(临界速度73%)4′×8′锥型球磨机的190千瓦卷线型电动机的回转数,用无极减速经过长期作业试验运行,确认临界速度52%、14.5转/分的低速作业是可行的,可取得综合降低作业成本的结果。(一)方法与措施1.使用液体电阻器。采用液体电阻器控制二次电阻调整190千瓦卷线型高压电动机速度试验结果决定将190千瓦10极的电动机改换成120千瓦14极的电动机。
Kamaishi ore beneficiation plant processing iron ore, copper and iron ore and copper ore. Concentrator power consumption accounted for 73% of the total power consumption of mines. Concentrator in order to reduce power consumption, without reducing the beneficiation indicators under the premise of the actual operation of the 20.4 rev / min (critical speed 73%) 4 ’× 8’ cone ball mill 190 kilowatts wound motor, It is feasible to confirm that the critical speed of 52% and the low speed operation of 14.5 rpm are achieved through the long-term operation test with non-polar deceleration, and the result of comprehensively reducing the operating cost can be obtained. (A) methods and measures 1. Use liquid resistors. The use of liquid resistors to control the secondary resistance adjustment of 190 kilowatts of wound high-voltage motor speed test results decided to 190 kW 10-pole motor to 120 kW 14-pole motor.