Experimental study on preparation of titanium-rich material by pressure leaching of titanium concentrate from titanium dioxide waste acid

Based on the current production technology of sulfate process titanium dioxide, this paper discusses the experimental study on preparation of titanium-rich materials by pressure leaching of titanium concentrate from titanium white waste acid, which combines the comprehensive utilization of titanium white waste acid with the production of titanium-rich material, and studies the effects of acid-ore ratio, leaching temperature and time on the grade of titanium-rich materials. The results showed that the titanium-rich materials in a TiO2 grade of above 80% could be obtained under the conditions of 8 ml: 1 g acid-ore ratio, 150 °C acid leaching temperature and 7–8 hours acid leaching time. In addition, XRD analysis shows that after completion of acid leaching, FeTiO3, the main phase in titanium concentrate, has been converted into TiO2 phase in titanium-rich materials.