工程科学学报2016，Vol.38Issue(2)：175-180,6.DOI:10.13374/j.issn2095-9389.2016.02.003
以煤泥为还原剂海滨钛磁铁矿直接还原焙烧反应历程
Direct reduction roasting process of seaside titanomagnetite with coal slime as a reductant
摘要
Abstract
The mineral composition variation of Indonesian seaside titanomagnetite at different roasting temperatures was studied in the direct reduction roasting process with coal slime as a reductant. The roasted products were analyzed by X-ray diffraction and scan-ning electron microscopy. It is found that as the roasting temperature rises the titanomagnetite is gradually reduced. Iron minerals in the titanomagnetite are first reduced to FeO and finally into metallic iron. Titanium minerals contained in the titanomagnetite are first reduced to titanium spinel and finally into ilmenite with a small amount of pseudobrookite. In the direct reduction roasting process, metallic iron particles generate at about 1100℃ and continue to grow. At 1250℃, molten metallic iron particles obviously increase and metallic iron particles continue to grow in the later thermal process. The separation of metallic iron and ilmenite is relized in this process.关键词
钛磁铁矿/煤泥/直接还原/焙烧/温度/分离Key words
titanomagnetite/coal slime/direct reduction/roasting/temperature/separation分类
矿业与冶金引用本文复制引用
于春晓,孙体昌,高恩霞,刘志国,徐承焱..以煤泥为还原剂海滨钛磁铁矿直接还原焙烧反应历程[J].工程科学学报,2016,38(2):175-180,6.基金项目
国家自然科学基金资助项目(51474018) （51474018）
