A model for estimating viscosity of molten silicate slag based on slag structure theory
A structure based viscosity model has been proposed in the present study. In the model, the viscous activation energy,Eη is assumed to be inversely proportional to the total distance (bond length) among ions in molten slag according to the structural features of silicate slag, and Eη has been derived based on pure SiO2 and inversely proportional to the same. The model formulation for correlating the viscosity of molten silicate system with its composition has been established where the mobility of an ion relative to pure SiO2 has been considered The rules for calculating the concentrations of various ions existing in different composition region of the melts are involved piecewisely in the model. Experimental viscosity data for SiO2-CaO-Al2O3-MgO system at different temperatures in literatures were used to fix the parameters in the present model. A reasonable agreement has been reached between the model estimated results and experimental data for SiO2-CaO-Al2O3-MgO system. The average relative deviation obtained is approximating 20％. The model also shows satisfactory prediction for the corresponding binary and ternary systems. These indicate the models good applicability to predict the viscosities of molten silicate slags.
Viscosity viscous activation energy ionic theory silicate
Jing Guo Shusen Cheng Hongbo Zhao
State Key Laboratory of Advanced Metallurgy&School of metallurgy and ecology engineering , University of Science and Technology of Beijing, Beijing, 100083, China
国际会议
Ninth International Conference on Molten Slags,Fluxes and Salts(第九届国际熔渣、溶剂与熔盐学术会议 MOLTEN12)
北京
英文
1-11
2012-05-27（万方平台首次上网日期，不代表论文的发表时间）