粗精矿 meaning in Chinese

rough concentrate

Abstract : the original mineral of dading iron mine was processed by the technique which included pre - classification , dry magnetic separation to discard dirt , magnetic separation of the coarsely ground ore , scondary grinding and secondary magntic separation of the rougher concentrate , thus raising the processing quantity of the crude ore , reducing the grinding cost , with the grade of iron concentrate 65 . 54 % , the recovery of iron 94 . 11 %
文摘:采用预先分级、干式磁选抛废、粗磨磁选、粗精矿再磨再磁选的工艺流程处理大顶铁矿原生矿，提高了原矿处理量，降低了磨矿成本，获得铁精矿品位65 . 54 、铁回收率94 . 11的技术指标