工程科学学报2016，Vol.38Issue(5)：658-667,10.DOI:10.13374/j.issn2095-9389.2016.05.010
冷却方式对低钛高炉渣矿物组成和矿相结构的影响
Effect of cooling methods on the mineralogical composition and microstructure of low titanium-containing blast furnace slag
张明博 1仇圣桃 2李建新 3朱荣 4刘宏强 5黄世平1
作者信息
- 1. 北京科技大学冶金与生态工程学院，北京100083
- 2. 钢铁研究总院连铸技术国家工程研究中心，北京100081
- 3. 河北钢铁股份有限公司承德分公司，承德067002
- 4. 钢铁研究总院连铸技术国家工程研究中心，北京100081
- 5. 河钢集团钢研总院，石家庄050023
- 折叠
摘要
Abstract
The mineralogical composition, microstructure and TiO2 distribution rule of low titanium-containing blast furnace slags after water cooling and air cooling were investigated by X-ray diffraction, polarization microscopy and scanning electron microscopy. The results show that main mineralogical compositions in these slags are all vitreous, gehlenite, perovskite and merwinite, but the con-tents of mineral components in the two kinds of slags have much larger differences. The average contents of gehlenite and perovskite in the air-cooled slag are 62. 5% and 12. 5%, which are 2. 27 and 1. 92 times as large as those in the water-cooled slag, respectively. The content of vitreous in the air-cooled slag is less than a third of that in the water-cooled slag. The mineralogical microstructure of the water-cooled slag is pretty different from that of the air-cooled slag. Gehlenite in the water-cooled slag is dentate, but in the water-cooled slag it is feathery and needle-shaped, and its grain size is smaller. Perovskite forms as star points and dendritic in the water-cooled slag and the air-cooled slag, respectively. Merwinite is spindle-shaped both in the water-cooled slag and the air-cooled slag. It could be concluded that TiO2 in the water-cooled slag mainly distributes in perovskite, vitreous glassy and gehlenite, but TiO2 in the air-cooled slag mainly distributes in perovskite and gehlenite, and the distribution ratio of TiO2 in the air-cooled slag is 8. 41% higher than that in the water-cooled slag. Air cooling is more beneficial to increase TiO2 content in perovskite.关键词
高炉渣/冷却/矿物学/显微结构/二氧化钛Key words
blast furnace slag/cooling/mineralogy/microstructure/titanium dioxide分类
矿业与冶金引用本文复制引用
张明博,仇圣桃,李建新,朱荣,刘宏强,黄世平..冷却方式对低钛高炉渣矿物组成和矿相结构的影响[J].工程科学学报,2016,38(5):658-667,10.
