Improvement Effect of FeSO·7HO on Flotation Separation of Scheelite from Fluorite.

In this study, FeSO·7HO was used as an auxiliary depressant to improve the selective depression effect on fluorite. Microflotation tests using oleic acid as the collector showed that the pre-addition of FeSO·7HO and subsequent addition of sodium silicate (SS) resulted in a stronger selective depression effect on fluorite compared with SS alone. Addition of FeSO·7HO reduced the required dosage of SS and had little negative effects on scheelite recovery.