Effect of Additive Oxides on the Viscosities of CaO-SiO_2-Al_2O_3 and CaO-Fe_2O_3 Melts

摘要

The effects of MgO, TiO_2 or Fe_2O_3 on the viscosity of 40CaO-40SiO_2-20Al_2O_3 /mass% slags have been measured by a rotating crucible viscometer. The viscosity of these quaternary slags decreased with increasing the content of additive oxide. At the same content of additive oxide, the viscosity decreases from MgO, TiO_2 to Fe_2O_3. In addition, the effects of SiO_2, Al_2O_3 or MgO on the viscosity of 26.1CaO-73.9Fe_2O_3 / mass% (CF) and 14.9CaO-85.1Fe_2O_3 / mass% (CF_2) slags have been measured. Viscosity of calcium ferrite slags increased with increasing SiO_2, Al_2O_3 or MgO content. Al_2O_3 was found to be more effective for increasing the viscosity at the same content of additive oxide.