Experiment Study on Utilization in Additive of Cement of Panzhihua Ti-bearing Blast Furnace Slag Flotation Tailings

In order to utilize titanium-bearing blast furnace slag,taking Panzhihua Ti-bearing blast furnace slag as raw material and recovering the titanium component through high temperature modificationflotation separation process.For flotation tailings,the characteristics of the mineral composition,micro-morphology,and specific surface area were analyzed,and tests were performed on cement mixtures under different conditions. The microstructure observation and mechanical properties tests on the cement blocks were then carried out. The experimental results show that the flotation tailings of Panzhihua Ti-bearing blast furnace slag with TiO₂ content of 8. 7% can be used as an additive into inert cement after being ground to d₉₀ of ~20 μm. When the massive weight of slag is 10%,the compressive strength of cement mortar after 28-days hydration is 50.2 MPa,and its activity index is 94.5%.