Effects of composition on properties of iron blast furnace slags
The blast furnace process continues to be the principal technique used for ironmaking in the world.Continuous increase of A1203 in BF slags may result in low gas permeability,formation of furnace wall accretion and heath accretion.These issues cannot be explained by the properties of the final slag.The data of phase equilibria and viscosity predicted by FactSage indicate that A1203 can increase the proportion of the liquid formed within the cohesive zone which decreases the gas permeability.Increase of metallization degree,CaO/Si02 ratio and Mgo concentration would balance the negative effect of A1203 0n gas permeability.In bosh slag CaO/Si02 ratio and Al2O3 concentration are important in controlling the viscosity of the slag.A large proportion of solid phase can form at CaO/SiO2 ratio above 1.3 which significantly increases the viscosity of the bosh slag.Mgo does not have significant effect on liquidus temperatures of bosh and final slag but can significantly decrease their viscosities.
blast furnace slags liquidus temperature viscosity
Baojun Zhao
School of Chemical Engineering,The University of Queensland,Australia
国内会议
上海
英文
1-8
2013-06-01（万方平台首次上网日期，不代表论文的发表时间）