ANALYSIS OF THE DEPHOSPHORIZATION IN THE BOF AT ARCELORMITTAL TUBARÃO

Recently, the demand for steels with low phosphorus content has been increasing. Due to this, it is necessary to improve the process to attain higher phosphorus partitions in steels produced in the BOF. The present paper shows the modifications carried out in the process variables such as: flux additions and oxygen lance position, in order to achieve the expected results. The basis for process modifications was established considering classical phosphorus partition models of Healy, Turkdogan, Balajiva. The results achieved during low phosphorus steels production before and after changing process variables are presented and discussed in this report. In addition, the impact of the new procedures on the refractory consumption is also analyzed.

Abstract licence: CC BY

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