Research on Viscosity of Shougang Blast Furnace Slags and Synthetic Slags
ZHANG Dian-wei1,2,ZHAO Zhi-xing1,ZHAO Bao-jun2
（1. Shougang Research Institute of Technology， Beijing 100043， China 2. School of Chemical Engineering，The University of Queensland， Brisbane QLD 4072, Australia）
Abstract：The liquidus temperatures and viscosities of the industrial blast furnace slags from Shougang and the corresponding synthetic slags have been measured. Liquidus temperatures of these slags have been determined by high temperature equilibration, quenching and Electron Probe X-ray Microanalysis (EPMA) technique. The viscosities of these slags have been measured using the custom designed rotating bob apparatus which enables control of the gas atmosphere and rapid quenching of the samples after completion of the experiment. The microstructures and phase compositions of the quenched slag samples after the viscosity measurements were determined by EPMA. It was found that the liquidus temperatures of the industrial BF slags are in the range of 1400 to 1440℃. The liquidus temperatures of the synthetic slags are 40~50℃ higher than those of the corresponding industrial slags. Presence of minor components such as sulphur, TiO2, MnO and FeO in the slag all results in decrease of the liquidus temperature. The viscosities of the industrial BF slags are in the range of 0.3 to 0.4Pa·s at 1500℃. The viscosities of the synthetic slags are 30% higher than those of the corresponding industrial slags at 1500℃. The differences of liquidus temperature and viscosity between industrial slags and synthetic slags will be useful indications to apply the results of the synthetic slags to promoting the operation of the blast furnace.
2014, Vol. 24 
