Abstract: Research is made on the reverse flotation by flotation column for desilication in order to improve the concentrate of magnetic separation of a hematite ore concentrator.The result indicates that compared to the conventional reverse flotation process consisting of one rougher, one cleaner and three scavengers, the process that adopts cyclonic static micro-bubble flotation column and consists of one rougher and one scavenger can raise the recovery by 8.37%.The application of cyclonic static micro-bubble flotation column has opened a new route for China's hematite reverse flotation.

Key words: Hematite, Cyclonic static micro-bubble flotation column, Reverse flotation