Application of Optical Basicity for Estimation of Viscosity of SiO₂-CaO-MgO-Al₂O₃ System

Abstract:

A viscosity model based on NPL model with the corrected optical basicity is proposed for quaternary SiO₂-CaO-MgO-Al₂O₃ slag system in the present work. The modified Arrhenius type of equation for temperature dependence of slag viscosity is employed. By means of fitting measured viscosity values for slags with basicity from 0.4 to 1.0 and temperature from 1593 to 1803 K, model parameters are optimized against values of optical basicity, which represents both the structure of molten slags and cationic effects. The relationship between model parameters and optical basicity, which is different from NPL model, is obtained. The present model is applied to estimate viscosity values of slag in SiO₂-CaO-MgO-Al₂O₃ system. The comparison between estimated and measured values shows good agreement with a mean deviation of 12%. It proves fully that the present model can express the temperature dependence and composition dependence of viscosity.

• Periodical: Advanced Materials Research (Volumes 1033-1034)
• Pages: 811-817
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1033-1034.811
• Online since: October 2014
• Authors: Chuan Hong*, Yun Ming Gao, Shao Bo Wang
• Keywords: Optical Basicity, SiO₂-CaO-MgO-Al₂O₃ Slags, Viscosity Model

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