Application Study Of Sulphide Capacity And Activity Model In Refining Slag

The sulphide capactiy of refining slag and activity model was developed in this paper, the compute programme of the slag sulphide capacity and activity model was programmed by applying VC++ 6.0 high-level programming language. The accuracy of calculated values by model was validated with experiment data. The major factors affecting desulphurization were analyzed by combination of industrial production slag system and steel melt conditions and the model established in the paper. In the end, the values calculated by model was contrasted with experiment results by combination with industrial production data. The results showed that at a given range of slag composition, the value calculated by KTH sulphide capacity and KTH activity model accorded well with experimental value. Sulphur distribution increased slowly and obviously with the increase of C content and Al content in the steel melt respectively;As the temperature decreased, sulphur distribution increased obviously;As the value of (Al₂O₃)%/(CaO)% decreased, sulphur distribution increased little. On the basis of industrial experimental data, It was discovered in the process of calculating sulphur distribution that the value of sulphide capacity calculated by optical basicity model is larger than KTH model;the value of alumina activity calculated by KTH activity model accords better than Ohta regression expression;and the value of sulphur distribution calculated by KTH sulphide capacity model and KTH activity model accorded well with experimental value;Aluminium-oxygen equilibrium is relatively more suitable than iron-oxygen equilibrium to calculate the oxygen activity in the steel bath. The Compute programme has good man-machine interactive interface and is of practical value...