化学选矿是处理难选磷矿石的有效方法。
Chemical beneficiation is an effective method for treating refractory phosphate ores.
然而其中1 000多吨是低品位难选冶金矿。
However, more than 1,000 tons are low-grade and hard to smelt.
浏阳含银难选铅锌矿多年来选矿生产指标不好。
The metallurgical pertormance was bad in LiuYang refractory Lead -Zinc Mine.
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