The particle size of grinding circuit is the important factor to the grade of concentrated ore and metal recovery rate.
磨矿分级作业是选矿生产过程中至关重要的环节，磨矿粒度的好坏直接影响到浮选的精矿品位和回收率。
He eventually hopes to use rock-cutting ROVs that will drive across the sea floor, grinding ore as they go and sending it to the surface via a tube at a rate of 400 tonnes per hour.
海登说，这是因为ROV技术只是在最近才得以真正用于实战。他最终希望能用可以横穿海底的岩石开掘机ROV将矿石碾碎，然后通过一条管道以每小时400吨的速度将其运至海面。
A technical scheme of grinding-waving bed to be sifted out is adopted and the fined ore grade can reach 40.41%. The rate of recovery is 70.92% in choosing target.
对于富矿的选别，采用粗磨跳汰—摇床的技术方案，得到的锰精矿品位为40.41%，回收率为70.92%的选别指标。
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