北京科技大学学报2013，Vol.35Issue(1)：41-48,8.
含钒钛铁矿球团还原过程中微观结构变化
Microstructure change of V-Ti magnetite concentrate pellets during reduction
摘要
Abstract
The reduction process of V-Ti magnetite concentrate pellets was studied under the simulated condition of blast furnaces. Phase compositions in the pellets at different reduction temperatures were determined by X-ray diffraction analysis. The microstructure change of the pellets during reduction was observed by optical microscopy and scanning electron microscopy. The distribution of different elements in oxides was identified by energy dispersive spectrometry. It is found that iron-titanium segregation in the pellets during reduction affects the reducibility of the pellets, and the formed ilmenite spar of high titanium content increases the difficulty in reduction of iron oxides. The dense iron shell formed at high temperature hinders the reduction of inner oxides, leads to stagnation of reduction, and makes the reducibility of the pellets poor at high temperature. When the inner liquid melt dripping down, the oxygen potential increases in the lower part of the blast furnace, which decreases the generation of Ti(C, N).关键词
磁铁矿/球团/还原/微观结构/物相组成/高炉Key words
magnetite/ ore pellets/ ore reduction/ microstructure/ phase composition/ blast furnaces分类
矿业与冶金引用本文复制引用
张建良,杨广庆,国宏伟,邵久刚,李健,文永才..含钒钛铁矿球团还原过程中微观结构变化[J].北京科技大学学报,2013,35(1):41-48,8.基金项目
国家科技支撑计划资助项目(2008BAB32B05) （2008BAB32B05）
国家自然科学基金资助项目(51204013) （51204013）
