Lean Operations Strategy to Combat Uncertainties in Temperture at BOF End Point, Tapping, Deoxidation, Alloy Addition and Thermal History
Steel plants generally employ static BOF end point control models to arrive at a given temperature and chemistry at the end of blow. These end point models have now been supplemented with chaos control models to steer the blowing process in the right direction while the blow is in progress. Merely arriving at the correct end point temperature is however not adequate because in the subsequent stages as well the temperature variations can be large and unpredictable. The present paper deals with an integrated model to take into account the effect of all parameters affecting temperature and composition from tapping to the start of casting to minimize the use of LF or aluminum heating, and also minimize grade mixing. The application of lean operations strategy is explained in which the previous “Push System” is changed to a “Pull System”, minimizing the use of ladle furnace or aluminum heating during steelmaking.
KeywordsBOF end point ladle finite difference model heat transfer decision support system
Unable to display preview. Download preview PDF.
- 1.L. Tang, J. Liu, A. Rong, Z. Yang; A mathematical programming model for scheduling steelmaking-continuous casting production, European J. of Operations Research, 2000, Vol. 120, p. 423–435Google Scholar
- 2.Sun Liang-Liang, Wang Xiu-ying; Application of mix optimization scheduling approach for steelmaking continuous casting process based on actual steelmaking industry J. of Iron and Steel Research International, 2013, 20(10), p. 01–09Google Scholar
- 3.Brahma Deo, Aart Overbosch, Bert Snoeijer Debasis Das, Karamanchi Srinivas: Technical paper 2712, Trans IIM, published online July 4, 2013, to be assigned to October 2013Google Scholar