杨林坳钨矿磨矿优化试验研究及其工业应用

Experimental Study on Grinding Optimization of Yanglin'ao Tungsten Mine and Its Industrial Application

针对杨林坳钨矿易脆,在磨矿分级过程中容易产生过粉碎,进行了球径精确化计算和条件试验对比,开展了工业化验证。工业试验验证结果表明,精确化球径配比为Φ80 mm∶Φ60 mm∶Φ40 mm=50%∶40%∶10%,在最佳磨矿浓度为70%,介质充填率为35%下,球磨机处理能力从32 t/h提升至39.5 t/h,增幅为23.4%,排矿产品-0.15 mm+0.023 mm产率从27.78%提高至38.65%,钨金属量提高了4.46个百分点;溢流产品-0.15 mm+0.023 mm产率从34.78%提高至38.98%,钨金属量提高了4.59个百分点。此外,磨机单位运行功率从11.43 kWh/t降低至9.89 kWh/t,降幅为13.5%;介质消耗从0.95 t/d降低至0.85 t/d,降幅为10.5%,节能降耗效果显著,该研究可为同类钨矿磨矿优化提供借鉴。

In view of the brittleness of Yanglin'ao tungsten mine,which is prone to over-crushing during grinding and classification,this paper studies the accurate calculation of ball diameter with the comparison of conditional tests and the industrial verification.The industrial test results show that:the accurate ball diameter ratio isΦ80 mm∶Φ60 mm∶Φ40 mm=50%∶40%∶10%.Under the optimum grinding concentration of 70%and medium filling rate of 35%,the ball mill's processing capacity increases from 32 t/h to 39.5 t/h,with a rise of 23.4%.The mineral discharge is-0.10%.The yield of overflow product-0.15 mm+0.023 mm increases from 34.78%to 38.98%,and the amount of tungsten metal increases by 4.59 percentage points.In addition,the unit running power of the mill decreases from 11.43 kWh/t to 9.89 kWh/t,with a reduction of 13.5%.The medium consumption is reduced from 0.95 t/d to 0.85 t/d,with a decrease of 10.5%.It demonstrates a remarkable effect of energy saving and consumption reduction.This study can provide reference for grinding optimization of similar tungsten mines.