摘要
对煤粉还原钒钛磁铁矿过程中产生的铁氧化物和钛铁化合物进行热力学分析,得出工艺还原过程中的反应热力学数据,进一步采用高温炉在还原温度1350℃、配碳比1.0、还原煤粒度小于75μm的条件下,考察还原时间对工艺指标的影响和还原过程,得出不同还原时间下产物的定量结果和物相成分.结果表明,还原时间为60min时,还原产物的全铁、金属铁、金属化率均达最大值,分别为68.60%,65.81%和95.93%,钒钛磁铁矿中铁氧化物的还原过程为Fe2O3→Fe3O4→FeO→Fe,钛铁化合物的还原过程为Fe2TiO5→Fe2TiO4→FeTiO3→FeTi2O5.
In order to clarify the reduction progress of vanadium titano-magnetite with coal powder, thermodynamic analysis on ferrous oxides and Fe-Ti oxides in reduction progress was studied respectively. Then, periodical experiment on reduction progress of vanadium titano-magnetite with coal powder was carried at the reduction temperature 1350 ℃, carbon ratio 1.0 and coal powder size less than 75 μm. The chemical and phase compositions of the reduced products under different reduction conditions were analyzed by chemical method and XRD. The results show that when the reduction time is 60 min, the respective contents of total Fe, metallic Fe and metallization rate of iron are 68.60%, 65.81% and 95.93%, and the reduction progress of Fe oxides is Fe2O3, Fe3O4, FeO, Fe, and the progress of Ti-Fe oxides Fe2TiO5, Fe2TiO4, FeTiO3, FeTi2O5.
出处
《过程工程学报》
CAS
CSCD
北大核心
2013年第2期236-240,共5页
The Chinese Journal of Process Engineering
基金
国家自然科学基金重大基金资助项目(编号:51090384)
国家高技术研究发展计划(863)基金资助项目(编号:2012AA062302
2012AA062304)
中央高校基本科研业务基金资助项目(编号:N110202001)
关键词
钒钛磁铁矿
新工艺
还原历程
热力学
煤粉
vanadium titano-magnetite
new process
reduction progress
thermodynamics
coal powder
