关键词: 含钛铁矿, 搅拌磨, 细磨（超细磨）, 弱磁选, 降钛, 高炉配料

Abstract: In order to explore the feasibility of reducing the TiO2 content of magnetic iron concentrate from Baiquan mine by increasing the fineness of grinding， fine/ultrafine grinding-low intensity magnetic separation process was used for titanium removal of the titanium-bearing iron concentrate. Under the optimal conditions of grinding fineness d90=34.7 μm and magnetic field intensity of 83.6 kA/m， the TFe grade of iron concentrate could be increased from 63.39% to 65.48%， meeting the requirements of first grade iron concentrate， and the recovery rate was 97.85%. At the same time， the content of impurity TiO2 in iron concentrate could be reduced by 1.04 percentage points. X-ray diffraction analysis and mineralogy characteristics analysis of the titanium-containing concentrate revealed that titanium in the high ferrotitanium concentrate was mainly presented in titanomagnetite. The impurities ilmenite and titanium-hematite could be removed from the high ferrotitanium concentrate by fine/ultrafine grinding-low intensity magnetic separation process. However， titanomagnetite and magnetite belong to the same kind of similarity， and their physicochemical properties are very similar， which is difficult to separate by magnetic separation. This is the reason why the titanium element of the iron concentrate was difficult to remove significantly. The research results show that the titanium in such kind of high-titanium iron concentrate cannot be removed by beneficiation， but its quality is pretty good and it is very suitable for use as ingredients in other low-titanium iron concentrates.

Key words: Titanium-containing iron ore, Stirred mill, Fine/ultrafine grinding, Low intensity magnetic separation, Titanium removal, Furnace ingredients