Accortling to the characteristics of concentrate, the authors analyse the reasons why the iron grade of roasted magnetic separation concentrate is not high.
从精矿性质特点着手，分析了酒钢选厂焙烧磁选精矿铁品位不高的原因和主要影响因素。
The method that the gold concentrate adding sodium sulfide is roasted could effectually raised the recoveries of gold, silver and copper.
该方法是将金精矿加入硫化钠后进行焙烧预处理，可有效地提高金、银、铜的回收率。
Neutral leaching residue of roasted zinc concentrate often contains germanium which is poorly recovered in conventional two-stage leaching.
硫化锌精矿焙烧矿的中性浸出渣常含有锗等有价元素，常规低酸高酸两段浸出流程锗的直收率低。
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