Abstract Scope |
In this work, for the RH refining high-carbon steel process insertion tube slag-sticking problem, through experimental and thermodynamic calculations to study the CaO-SiO2-Al2O3-MgO-FeO-MnO-CaF2-Na2O slag system performance and its law of change, analyzed the interaction of refining slag and insertion tube refractory material. The results show that in the range of slag system composition in this study, the melting temperature increases first and then decreases with the increase of alkalinity, while the viscosity changes in the opposite way. The increasing mannesmann index will reduce the melting temperature, but the viscosity change is first increased and then decreased; the main phases of the slag layer after the interaction between the refining slag and the corundum coating material are Ca2SiO4 and Ca2Al2SiO7; comprehensive analysis of the basicity of 2.2-2.6,mannesmann index of 0.15-0.25,MgO of 5wt%, CaF2+Na2O of 6wt% of refining slag, both better refining capacity, but also can reduce the insertion tube slag-sticking. |