On Dependence of High Temperature Rheological Behaviour of Blast Furnace Slag on Its Network Structure

Iron ore quality is increasingly deteriorating with respect to high alumina-silica ratio, occasionally alumina in iron ore becomes even higher than 20%. High alumina affects the blast furnace slag (that comprises Al2O3, SiO2, CaO, FenO, MgO, MnO etc.) viscosity and its network structure. It in turn enhances energy consumption and CO2 emission of blast furnace. The paper presents the effect of alumina on the slag rheology and its flow characteristics. It also correlates blast furnace slag rheological behavior with its network structure.