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阶段选鑛就是把鑛石的解离和选别作业分成几个阶段来进行,也就是所谓“分磨分选”的一种先进选鑛方法。在苏联和一些科学技木发达的国家里,阶段选鑛流程已经被广泛地采用。苏联米尔格利姆选鑛厂,采用此法,提高铅的回收率15％;哲兹卡兹干选鑛厂用粗精鑛再磨的流程以后,铜的精鑛品位提高50％。在我国阶段选鑛法也同样地受到重视和推广,并且在一些先进的厂鑛里已经获得良好的效果。第一锡鑛大屯选鑛厂推行了此法,做到了分磨分选,把过去二段选别流程改为三段,大大地防止了锡石过于粉碎,提
Stage dressing is the ore dissociation and sorting operations are divided into several stages to carry out, that is, the so-called “sub-mill sorting” an advanced dressing method. In the Soviet Union and some countries with advanced science and technology, the stage beneficiation process has been widely adopted. With this method, the mill in the Soviet Union Millikeli increases the recovery rate of lead by 15%. After the process of re-grinding crude concentrates at Zhezikazan concentrator, the concentrate grade of copper is increased by 50%. At the stage of our country beneficiation method is equally valued and promoted, and in some advanced factories and mines have already obtained the good result. The first tin Datun beneficiation plant implemented this method, so that the separation of the mill, the process of sorting and converting the last two sections into three sections, greatly prevents the crushing of cassiterite