Mechanism of phase separation in BFS (blast furnace slag) glass phase  

作　　者：LI Yu LIU XiaoMing SUN HengHu CANG DaQiang 

机构地区：[1]Key Laboratory of Ecologic and Recycle Metallurgy, Ministry of Education, University of Science and Technology Beijing, Beijing 100083, China [2]School of Engineering and Computer Science, University of the Pacific, Stockton, CA 95211, USA

出　　处：《Science China(Technological Sciences)》2011年第1期105-109,共5页中国科学（技术科学英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant No.50954004);the National Science & Technology Pillar Program of China (Grant No.2007AA03Z529)

摘　　要：XRD,TEM,ED,and NMR analyzed four types of blast furnace slags (BFS) with different structures in this paper. The composition requirement for phase separation in BFS glass phase was then put forward,that is the composition of slag locates in the coexisting phase region of melilite and any silicate mineral with Q0 units. The special structure of melilite units,a 5-membered ring with high degree of polymerization (DOP),plays a key role in the formation of phase separation. In BFS system,one with chemical composition of larger ratio of (CaO + MgO/(SiO2 + Al2O3) would be more promising to meet the requirement for phase separation.

关 键 词：blast furnace slag （BFS） phase separation glass phase REQUIREMENT melilite structure 

分 类 号：TQ172.44[化学工程—水泥工业] TS103.846[化学工程—硅酸盐工业]