Viscosity and Fluidity of High Alumina Slag

Abstract

It is expected in the near future that the ratio of the southern are in charge for B.F. will increase in Japan. Then, alumina contents in B.F. slag will amount to more than 20%.
This paper deals with the fundamental study of viscosity and fluidity of high alumina slag at high temperature.
The results of study are as follows.
When alumina contents in B.F. slag increase, viscosity at each temperature increases.
When basicity of high alumina B.F. slag increases, viscosity at high temperature (about 1550..) decreases, but viscosity at slagging temperature increases.
Addition of MgO, Na₂0 to high alumina slag makes viscosity and fluidity decrease. When measuring fluidity at constant pouring temperature and constant mould temperature the measured results become highly reliable, and close mutual relations are found between fluidity and liquidus temperature (at this temperature viscosity reachs 20 poise), or between fluidy and viscosity at pouring temperature.