青海某贫硫金矿石选厂磨矿分级系统优化试验研究

由于青海某贫硫金矿选厂磨矿钢球配比偏大,操作参数不合理,导致了磨矿分级系统磨矿效率低、处理量小、磨矿细度不够等问题。通过实验室前期试验并经球径半理论公式计算,确定现场补加球大小和比例。采用JKsimMet软件模拟工业试验流程,寻找磨矿分级回路最佳参数,进行工业试验。试验结果表明:JksimMet软件可以较好地模拟现场磨矿分级回路,为现场优化提供参考和方案;一段磨处理量提高了6.5 t/h,球耗降低了14.29%,排矿细度增加了27.9%,P80降低了60.91%;二段磨排矿细度增加了31.3%,P80降低了13.31%,实现了磨矿效率提高,处理量增加,节能降耗的目的,磨矿分级系统得到了优化。

An Optimization Test Study for Milling -classification Operation System of a Poor Sulphur Gold Ore Concentrating Plant in Qinghai Province

Because the grinding ball is big and operating parameters are not reasonable in the the sulfur gold ore dressing plant of Qinghai Province，grinding efficiency is low in milling-classification operation system，the capacity is smaller and grinding fineness is bad.Based on the previous test in the laboratory and the calculation of the half-theory formula，the ball and ratio are determined.The JKsimMet soft is taken to simulate industrial test process to find the best operating parameters in milling-classification operation system and make industrial test.Good practice dictates that the JKsimMet soft can simulate the milling-classification operation and get a better result that provide a guidance for industrial experiment，the conclusions are obtain that the capacity of primary grinding increases by 6.5 t/h，metal consumption reduces by 14.29%，grinding fineness adds by 27.9%，P80 drops by 60.91%.The fineness grinding of the secondary raises by 31.3%.P80 cuts down 13.31%.The grinding efficiency is improved and the capacity is increased.Milling-classification operation system is better.