Revision of Quasi-chemical Viscosity Model for Viscosity Estimation of Molten Multi-component Oxide Slag
A quasi-chemical viscosity model (QCV) had been previously developed that enables the viscosities of multi- component molten oxide slags to be predicted within experimental uncertainties over wide ranges of composition and temperature. The Eyring equation is used to express viscosity as a function of composition and temperature. The QCV model links the vaporisation and activation energies to the slag internal structure through the concentrations of various Si0.5O, Men+2/nO and Men+1/nSi0.25O viscous flow structural units. The concentrations of these structural units are derived from a quasi-chemical thermodynamic model of the liquid slag. In the present study, the quasi-chemical viscosity model formalism has been revised, and a number of shortcomings in the previous model have been resolved. The links between model parameters and fundamental physical properties or structural characteristics of oxide melts have been introduced with reference to physical basis of the model. Agreement with the available experimental viscosity data has been improved. The QCV model parameters have been successfully extended to the multi- component SiO2 - Al2O3 - CaO - MgO - Na2O - K2O - FeO - Fe2O3 - PbO - ZnO system, and over 7000 experimental viscosity data in this system have been reproduced within 25 ％ as the average of the relative errors.
Viscosity Model Multi-component oxide systems Viscous flow structural unit
Masanori SUZUKI Evgueni JAK
Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, 565-0871 Osaka, Japan Pyrometallurgy Research Centre, The University of Queensland, St Lucia, Brisbane, QLD 4072 Australia
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
1-15
2012-05-27（万方平台首次上网日期，不代表论文的发表时间）