In this paper,the titanium in blast furnace slag was concentrated into perovskite phase by selective precipitation and growing up,then the flotation performance was researched by investigating the amount of collector oil acid,collector A,inhibitor sodium silicate and CMC in normal temperature(25 ℃) and normal pH(9.3).The experimental results show that both collector oil acid and collector A could be used for the flotation of modified blast slag,but flotation performance of collector A was better;both inhibi...