Application of Flue Gas Analysis in 120 t Converter
In this study,a carbon integral model was developed to predict the carbon content and temperature of molten steel based on the carbon balance principle.The model was applied to a 120-ton converter at Longmen Iron and Steel Co.,Ltd.in Shaanxi Province,which effectively guides the converter smelting process,reduces the end-point refilling times and reduces one time dephosphorization rate.The results show that the model shows good adaptability and high accuracy,and plays an important role in the company's 120-ton converter smelting production.When the end-point carbon content(w(C))is less than 0.2％,the predicted deviation of the model is less than 0.02％in the effective furnace with the factors such as composition of hot metal,abnormal temperature measurement and abnormal weight of scrap excluded,the accuracy of the prediction was 86.38％,the accuracy of the prediction was 94.42％when the deviation was less than 15 ℃,and the accuracy of the prediction of C-T was 81.49％,the requirement of terminal hit ratio in smelting process is achieved.
converter steelmakingflue gas analysiscarbon integration modelcarbon content in molten steelC-T double hit rate
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