一、前言我厂自1955年1～5月份实行中鑛再磨与新给鑛混合处理,以后因效果不大,在6～8月份,又实行磨分级机第三种产品,在8月间经过苏联专家和上级指示又从新研究改为单独再磨中鑛,单独处理,经过长时期的试验研究,到目前为止,选鑛成绩大有提高,证明了中鑛单独再磨处理方法的优越性。(一)中鑛单独再磨处理以后,在浮选成绩方 First, the foreword I plant from January to May 1955 in the implementation of the medium and then to the new ore mine mixed processing, because of the effect is not, in 6 ~ August, and the implementation of the third grade mill products, in August After the Soviet Union experts and superiors instructions from the new study to re-grinding mine alone, separate treatment, after a long period of experimental study, so far, beneficiation results greatly improved, proved that the mine re-grinding regrind alone superiority . (A) after the mine re-grinding process, the results in the flotation