In recent years, through strengthening management in decreasing ore dilution rate, increasing the head grade and increasing recovery rate in Fengshan Copper Mine, good economic benefit is obtained.

近几年来，丰山铜矿加强管理，降低采矿贫化率，提高入选原矿品位，提高选矿回收率，实现了年增上千万元的经济效益。

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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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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。

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