A General Viscosity Model for Molten Blast Furnace Slag

作者：Gan, Lei^*; Lai, Chaobin

来源：Metallurgical and Materials Transactions B-Process Metallurgy and Materials Processing Science, 2014, 45(3): 875-888.

DOI：10.1007/s11663-013-9983-9

• FULLY LIQUID SLAGS
• AL2O3-CAO-FEO-MGO-SIO2 SYSTEM
• SILICATE MELTS
• CRYSTALLIZATION KINETICS
• AMPHOTERIC BEHAVIOR
• GLASS-CERAMICS
• MGO
• AL2O3
• CAO
• CAO-SIO2-MGO-AL2O3

Blast furnace slag is the most abundant slag in the steel industry. Its metallurgical properties are determined to a great extent by its viscosity. Therefore, it is necessary to establish a reliable viscosity model for blast furnace slag. In the current work, a simple, accurate, and physically meaningful viscosity model for a wide composition range of blast furnace slags is developed based on the Vogel-Fulcher-Tammann (VFT) equation: log eta = A + B/(T - C). The model is calibrated by a database containing 365 compositions and 1233 measurements of synthetic and industrial slags. The parameter A has a value of -3.10. The parameters B and C are related to the mass fraction ratio of (CaO + MgO) to (SiO2 + Al2O3) and liquidus temperature of the slag, respectively. Present viscosity model accurately predicts the viscosity of blast furnace slag with relative average error (Delta) of 0.211 (+/- 0.180) and root mean square error (RMSE) of 0.239 Pa center dot s. A slight modification of this model can also predict the glass transition temperature of blast furnace slag satisfactorily.

• 出版日期2014-6
• 单位江西理工大学