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金属矿山是冶金工业的一个部分。从整个冶金工业的经济收益情况分析,为了提高冶炼质量,降低选矿成本和提高矿石有用成分的回收率,世界各国的生产实践都倾向于对复杂矿床采用按品种分采的采矿方法。分采方法对提高经济收益的作用是显著的。苏联某镍矿由混级开采改为分级开采后,若干基本指标的变化充分反映了这一事实(见表1)。分采时采出矿石的品位较高,主要由于减少了贫化的结果。苏联从1932年开始在巴加利铁矿用1—1.5米~3电铲分采含磷的铁矿石,1940年开始在科
Metal mines are a part of the metallurgical industry. From the analysis of the economic benefits of the entire metallurgical industry, in order to improve the quality of smelting, reduce beneficiation costs and increase the recovery rate of useful components of ore, production practices in various countries in the world tend to adopt mining methods that divide ore into different types of ore deposits. The effect of sub-mining methods on improving economic returns is significant. The change of several basic indicators of a nickel mine in the Soviet Union from mixed mining to graded mining fully reflects this fact (Table 1). The grade of ores extracted during sub-mining is higher, mainly due to the reduced depletion result. The Soviet Union from 1932 at the Ba Gali iron ore with 1-1.5 m ~ 3 electric shovel mining phosphorus ore, 1940 began in Section