为普及选矿知识,并供某些中小化工矿山选厂进行小型试验时参考,特发表此文。欢迎读者来稿介绍与探讨更科学、简单的闭路试验方法与计算方法。 In order to popularize mineral processing knowledge, and for some small and medium-sized chemical mines choose small factory for reference when testing, especially published in this article. Welcome readers to introduce and discuss more scientific, simple closed-circuit test methods and calculation methods.