中北大学学报（自然科学版）2016，Vol.37Issue(5)：546-551,6.DOI:10.3969/j.issn.1673-3193.2016.05.020
钒钛磁铁精矿固态还原的强化研究
Study of Solid State Reduction Strengthening of Vanadium-Titanium Magnetite Concentrate
摘要
Abstract
Panzhihua vanadium-titanium magnetite concentrate was used to study the solid state reduction behavior and strengthening technology of reduction process by pre-oxidation treatment.The influences of pre-oxidation temperature and time on the metallization rate,phase variation and microstructure were investigated.The results show the metallization rate after oxidizing for 6 min at 900 ℃ was 12.86%higher than that without pre-oxidation.A long pre-oxidation time can effectively improve the metalliza-tion rate of the pellets,and the metallization rate after pre-oxidizing for 15 min at 900 ℃ was 8.08%higher than the result of 6 min.After the pre-oxidation,the hematite appears due to the oxidation of magnetite,the hematite and TiO2 appear from the oxidization of ilmenite,and lastly the pseudobrookite forms.The particles of pre-oxidized vanadium-titanium magnetite concentrate contain many inner defects and an irregular shape,which promotes the reaction of the reductant and vanadium-titanium magnetite concentrate particles and further enhances the reducing property significantly.关键词
钒钛磁铁精矿/预氧化/固态还原/强化机理/显微结构Key words
vanadium-titanium magnetite concentrate/pre-oxidation/reduction/strengthening mecha-nism/microstructure分类
矿业与冶金引用本文复制引用
吕亚男,郭宇峰,温贻芳,陈栋..钒钛磁铁精矿固态还原的强化研究[J].中北大学学报（自然科学版）,2016,37(5):546-551,6.基金项目
国家自然科学基金资助项目(51504155) （51504155）
江苏省青年基金资助项目(BK20140337) （BK20140337）
