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采矿生产发展的特点是矿石中有用组份的品位不断降低;在矿山工程不断延深的条件下增加金属的产量,特别是增加采矿量。例如,采出矿石中,铁的品位每年降低1%,再过20～25年,矿石的开采和加工量,就得增加一倍以上。低品位矿石选矿量的增加,大大提高了矿石的加工成本,矿石从地下提升到地表,并运到选矿厂的数目日益增加,需耗费大量钱财。经选矿厂分选
The development of mining production is characterized by the continuous reduction in the grade of useful components in the ore; increased metal production, in particular increased mining, under conditions of deepening mining engineering. For example, in ore mining, the grade of iron is reduced by 1% per year. In 20-25 years, the ore mining and processing volume more than doubled. The increase in beneficiation of low-grade ores has greatly increased the processing cost of ores. The number of ore that is raised from the ground to the surface and transported to the beneficiation plant is increasing day by day, which requires a large amount of money. Sorted by the beneficiation plant