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齐大山选矿厂焙烧矿磁选车间于1970年投产。原设计五个系列均采用二段连续磨矿单一磁选流程。十多年来,全国各研究单位的选矿工作者做了大量试验研究工作,生产技术水平不断提高。1980年以来又应用了细筛新技术,1982年生产指标创造了历史最好水平,铁精矿品位62.39％,回收率78.33％。
Qi Dashan concentrator roasting mine magnetic separation plant put into operation in 1970. The original design of the five series are used two consecutive grinding a single magnetic separation process. For more than a decade, beneficiation workers from various research institutes across the country have done a great deal of experimental research and have continuously improved their production technology. Since 1980, the application of fine screen new technology, production indicators in 1982 created the best level in history, iron concentrate grade 62.39%, the recovery rate of 78.33%.