我国现行的一般矿石工业品位指标,就若干金属矿种来说,基本上始于五十年代。二十多年来,尽管有些矿区在具体工作中不断进行了修改,但是还没有来得及着手系统的分析研究。为了认真地总结我国自己的经验,促进冶金工业的大发展,看来有必要对一般矿石工业品位指标作一些系统的分析研 The current general ore industrial grade index in our country, for a number of metal ores, basically began in the 1950s. For more than two decades, although some mines have undergone constant changes in specific work, they have not had time to start systematic analysis and research. In order to conscientiously sum up our own experience and promote the great development of the metallurgical industry, it seems necessary to make some systematic analysis of the general ore industry grade index