工程科学学报2017，Vol.39Issue(11)：1669-1673,5.DOI:10.13374/j.issn2095--9389.2017.11.009
CaO--TiO2--Fe2O3三元系中Ca3TiFe2O8的生成机理
Formation mechanism of Ca3TiFe2O8in a CaO--TiO2--Fe2O3system
摘要
Abstract
Vanadium-titanium magnetite is one of the important raw materials for iron making in a blast furnace. Ca3TiFe2O8, which is a mineral of vanadium-titanium sinter, was discovered to form during the process; however, its formation mechanism is not clear. In this work,an X-ray diffraction analysis,an elemental spectroscopy,and a TG--DSC were employed to investigate the forma-tion mechanism of Ca3TiFe2O8and the formation law at different temperatures and at CaO and TiO2contents in the CaO--TiO2--Fe2O3 system. The formation mechanism of Ca3TiFe2O8is clarified: CaO reacts with Fe2O3to form Ca2Fe2O5, and then continues to react with the CaTiO3to form Ca3TiFe2O8. The longer the reaction time, the greater is the amount of Ca3TiFe2O8formed. However, the effect of temperature on the formation of Ca3TiFe2O8is not obvious. It is found that high CaO content contributes to the formation of Ca3TiFe2O8. Further,so long as TiO2is present,Ca3TiFe2O8is formed under the condition of equal molar concentration Fe2O3and CaO.关键词
钒钛磁铁矿/烧结/Ca3TiFe2O8/生成机理/生成规律Key words
vanadium and titanium magnetite/sintering/Ca3TiFe2O8/formation mechanism/formation law分类
矿业与冶金引用本文复制引用
项南,郭玉峰,郭兴敏..CaO--TiO2--Fe2O3三元系中Ca3TiFe2O8的生成机理[J].工程科学学报,2017,39(11):1669-1673,5.基金项目
国家自然科学基金资助项目(U1460201,51374017) （U1460201,51374017）
