鞍钢烧结总厂浮选车间处理大孤山赤—磁铁矿石,过去一直采用磁—浮联合流程(以下简称旧流程),其金属回收率一般平均在60％左右,甚至有的更低一些。为了提高金属回收率,从1963年11月～1964年4月曾进行了浮—磁流程的小型试验,1964年11月开始了工业试验,在此基础上确定用浮—磁流程(以下简称 In the past, the processing of Dagushan red-magnetite ore at the flotation plant of Ansteel Sintering Plant has been using the magnetic-floatation combined process (hereinafter referred to as the “old process” for short) and the average metal recovery rate is about 60% on average, and some are even lower. In order to improve the metal recovery, from November 1963 to April 1964, a small-scale test of floating-magnetic flow was carried out. In November 1964, an industrial test was started. On the basis of this, it was confirmed that a float-magnetic flow