n.选矿
The paper introduces wastewater treatment technology of Sillimanite beneficiation. 本文对介绍硅线石选矿废水的处理工艺进行了论述。
Lime is widely used in the beneficiation or recovery of non-ferrous metal ores. 石灰广泛运用在有色金属矿的选矿或者还原上。