| 摘要 |
The present invention relates to a dephosphorization predicting method in the double dephosphorization of low phosphorous steel. The present invention comprises the steps of: measuring the temperature of molten iron before a primary blowing process of a converter; measuring the concentration of carbon and silicon in the molten iron before the primary blowing process; measuring the content of CaO, SiO_2, and P_2O_5 in slag at the end point of the primary blowing process of the molten iron; and calculating the distribution ratio of phosphorous using the temperature of the molten iron, the concentration of the carbon, the concentration of the silicon, and the content of the CaO, the SiO_2, and the P_2O_5 in the slag measured above. [Reference numerals] (AA) Start; (BB) End; (S10) Preprocess molten iron (Desulfurization); (S20) Measure the temperature of the molten iron; (S30) Measure each concentration of carbon and silicon in the molten iron; (S40) Primarily blowing in a converter (Dephosphorization); (S50) Measure the content of CaO, SiO_2, and P_2O_5 in slag at the end of the primary blowing process; (S60) Calculate the distribution ratio of phosphorous using the measured values; (S70) Predict the remaining amount of phosphorous after the dephosphorization from the calculated distribution ratio of phosphorous, and determine an input amount of a dephosphorizing agent in a secondary blowing process |
