By analysing the factors that affect oxygen consumption during the basic oxygen furnace steelmaking process, a multiple linear regression model for predicting the oxygen blowing quantity was obtained on the basis of actual production data. Additionally, an oxygen balance model for prediction of the oxygen blowing quantity was established on the basis of oxygen balance. These two models were amalgamated to establish an integrated model for prediction of the oxygen blowing quantity. The average relative error of the integrated model is ,1%, and the hit rate of the integrated model is 97?14% when the relative errors of the model are within 5%. Relative to the multiple linear regression and the oxygen balance models, the integrated model may provide a more accurate prediction of the oxygen blowing quantity, and thus represents a good reference point for actual production.List of symbols c i oxygen consumed per unit mass of oxidised element i, Nm 3 kg 21 m i amount of oxidised element i, kg V balance, O 2 oxygen blowing quantity predicted from the oxygen balance model, Nm 3 V CO, O2 oxygen quantity consumed by postcombustion of carbon monoxide in the furnace hearth, Nm 3 V gas, O 2 amount of unused oxygen in the offgas, Nm 3 V O 2 oxygen blowing quantity predicted from the integrated model, Nm 3 V real, O 2 actual value of the oxygen blowing quantity, Nm 3 V regression, O 2 oxygen blowing quantity predicted from the linear regression model, Nm 3 V sinter ore, O 2 quantity of oxygen provided by the sinter ore, Nm 3 w r , w b weighting coefficients of the linear regression model and oxygen balance model
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