工程科学学报2016，Vol.38Issue(5)：609-616,8.DOI:10.13374/j.issn2095-9389.2016.05.003
高炉灰为还原剂对海滨钛磁铁矿直接还原焙烧磁选--钛铁分离的影响
Effect of blast furnace dust as a reductant on direct reduction roasting for separating titanium and iron in seaside titanomagnetite
摘要
Abstract
The feasibility and mechanisms of using the blast furnace dust as a reductant in direct reduction-low intensity magnetic separation of Indonesian seaside titanomagnetite were investigated. The results show that the blast furnace dust can be used as an alter-native to coal as a reductant under the condition of fluorite as an additive. Under the synergistic effect of the blast furnace dust and flu-orite, the recovery and grade of iron in the reduction iron powder can be increased and the content of TiO2 can be decreased at the same time during the direct reduction process. Simultaneously, iron in the blast furnace dust can also be recovered. A comparison of three different kinds of blast furnace dusts indicates that the composition of the blast furnace dust can influence the effect of reduction. Under the same dust dosage, the Jinxin blast furnace dust ( referred to as JX) show the best reduction performances. The optimum conditions of roasting reduction are the blast furnace dust dosage of 30%, the fluorite dosage of 10% and reduction at 1250℃ for 60 min. The reduction iron powder, with 91. 28% Fe grade, 0. 93% TiO2 content and 89. 19% total iron recovery including iron in the run-of-mine and blast furnace dust, is obtained after the roasted product is processed by using a process of two-staged grinding and two-staged magnetic separation.关键词
钛磁铁矿/高炉灰/直接还原/焙烧/磁分离Key words
titanomagnetite/blast furnace dust/direct reduction/roasting/magnetic separation分类
矿业与冶金引用本文复制引用
胡天洋,孙体昌,寇珏,耿超,高恩霞..高炉灰为还原剂对海滨钛磁铁矿直接还原焙烧磁选--钛铁分离的影响[J].工程科学学报,2016,38(5):609-616,8.基金项目
国家自然科学基金资助项目(51474018) （51474018）
