High Alumina High Basicity Type Of Titanium Slag Desulfurization Performance Study

In order to research desulfurization of high aluminum and high basicity in medium-titanium slag, this article has to do the experiments of desulfurization and viscosity of the slags. Based on the ionization and molecular coexistence theory of slag, this article build a general thermodynamic model of sulphur distribution ratio between CaO-SiO2-Al2O3-MgO-TiO2ironmaking slag and hot metal. The sulphur distribution ratio that included high aluminum and high basicity in medium-titanium slag, in high titania slag and in the producing BF slag is calculated by using thermodynamic model.The viscosity experiment indicates that melting temperature and viscosity is higher then the slag basicity at1.35, the Al2O3value at18%and TiO2value at13%. The desulfurization experiment indicates:the sulphur distribution ratio increase then the slag basicity rise to1.30from1.15and reduce then the slag basicity over1.30; the sulphur distribution ratio reduce then the Al2O3value rise to18%from14%; the sulphur distribution ratio increase then the MgO value rise to13%from9%; the sulphur distribution ratio increase then the TiO2value rise to10%from9%and reduce then the TiO2over10%.Based on the ionization and molecular coexistence theory of slag, this article build general thermodynamic model of sulphur distribution ratio which between CaO-SiO2-Al2O3-MgO-TiO2ironmaking slag and hot metal. The concentration controled equation can be solved by using the matlab7.0. The developed thermodynamic model not only can calculate sulphur distribution ratio of CaO-SiO2-Al2O3-MgO-TiO2slags, but also can quantitatively determine the respective contributions of free CaO and free MgO in CaO-SiO2-Al2O3-MgO-TiO2slags.Satisfactory effects are obtained after using the thermodynamic model to calculate the sulphur distribution ratio of high aluminum and high basicity in medium-titanium slag at the condition that the basicity rise to1.30from1.15, the A12O3value rise to17%from14%, the MgO value rise to12%from9%, the TiO2value rise to12%from9%. Unsatisfactory effects are obtained after using the thermodynamic model to calculate the sulphur distribution ratio of high aluminum and high basicity in high-titanium slag. Besides, Satisfactory effects are obtained after using the thermodynamic model to calculate the sulphur distribution ratio in producing BF slag.