某难选萤石矿低温浮选试验研究

A flotation experimental research on a hard-selected fluorite in Inner Mongolia at low temperature

内蒙古某萤石矿属石英型细粒嵌布萤石,在研究内蒙古某萤石原矿性质与特征的基础上,通过系统的选矿试验研究,确定了"一粗七精",在碱性条件下(pH=9.0)粗选,在弱酸性条件下(pH=6.0)精选,粗选和精选Ⅰ排尾,中矿集中返回到精选Ⅰ的工艺流程。在低温下,通过在精Ⅲ补加捕收剂,可获得与常温下接近的浮选指标。15℃闭路浮选可获得含CaF2品位β=98.34%、回收率ε=87.42%的优质萤石精矿,在5℃开路浮选也能得到CaF2品位β=97.70%的二级萤石精矿。

Fluorite mine in Inner Mongolia is a kind of fine-grained fluorite mine with quartz. By the research on the fluorite ore character and mineral processing tests, a best technology are determined, which consist of one weak alkaline roughing and seven weak acidic cleanings, roughing and cleaning Ⅰ tailings discarded as a final tailing, and middlings sent back together to cleaning Ⅰ. By adding collector YSB-2 to cleaning Ⅲ at low temperature, the flotation result which is similar with at room temperature can be obtained. And the high-quality close circle fluorite concentrate can be obtained with CaF2 of 98.34%, recovery of 87.42% at 15℃, and the second-grade fluorite concentrate can also be obtained with CaF2 of 97.70% at 5℃.