Influence of Basicity and MgO on Fluidity and Desulfurization Ability of High Aluminum Slag

Abstract

Abstract The viscosity of experimental slag, which was mixed based on the composition of a practical blast furnace slag, was measured in this paper. The influence of Al 2 O 3 and MgO content, basicity R 2 = w (CaO)/ w (SiO 2 ) on the fluidity of slag was studied. The stepwise regression analysis in SPSS was used to reveal the relationship between sulfur distribution coefficient L S and slag composition as well as furnace temperature. The results show that increasing of MgO up to 12% can decrease the slag viscosity. The w (MgO) should be controlled below 8% when there is 20% Al 2 O 3 in the slag. Temperature of hot metal and content of CaO in slag are the two dominant factors on the desulfurization capacity of slag.