4. Dry magnetic separators can be used for low grade of ore preselection homework prestressing, the enrichment of mineral resources, improve the grinding grade, reduce ore dressing cost.
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reduce ore dressing cost
降低选矿成本
以上为机器翻译结果,长、整句建议使用 人工翻译 。
Contrasting old and new reagents test proved that using new reagent can largely reduce reagent cost and get better ore dressing indexes.
新旧药剂组方的对比试验表明:使用新组方可较大幅度降低选矿药剂成本,且获得比较好的选别指标。
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