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A Viscosity Estimation Model for Molten Slags in Al 2 O 3 ‐CaO‐MgO‐SiO 2 System
Author(s) -
Shu Qifeng
Publication year - 2009
Publication title -
steel research international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.603
H-Index - 49
eISSN - 1869-344X
pISSN - 1611-3683
DOI - 10.2374/sri08sp085
Subject(s) - viscosity , work (physics) , thermodynamics , materials science , metallurgy , chemistry , mineralogy , physics
A model for viscosity estimation of molten slags in the Al 2 O 2 ‐CaO‐MgO‐SiO 2 system is presented in this work. The model is an extension to the viscosity estimation model of molten slags in the CaO‐FeO‐MgO‐MnO‐SiO 2 system developed before by the present author. The present model has explicitly taken charge compensation into consideration. It is postulated that Al exists in a structural unit MAl 2 O 4 when MO/ Al 2 O 3 >1 for the Al 2 O 3 ‐MO‐SiO 2 system (MO=CaO, MgO). MAl 2 O 4 has a similar behaviour as SiO 2 , i.e. it can form an Al‐O‐Al network and be depolymerised by network modifying oxides (CaO, MgO). The present model is applied in viscosity estimation of some slags within the Al 2 O 3 ‐CaO‐MgO‐SiO 2 system. A mean deviation of less than 25% is achieved for the present model.