Abstract

This paper describes the computer model for BOF control that was in use at Smederevo, Serbia, during the period 1994-2006. The model was developed at the Institute of Metallurgy of the Smederevo Steelwork in mid-1994 and was motivated by the fact that the plant in Smederevo, by that time, had many years of experience in endpoint control using Intermediate Stop Practice (ISP). The vision for the model was to continuously improve and adapt to the working conditions of production through self-learning and adjustments. The model belongs to the well-known family of Static-Dynamic models (SDMs). It is aimed to reduce the "oxygen off-to-start tap" time and thus increase productivity and reduce production costs. The paper briefly describes the metallurgical software, operator operations and provides some information on the model's effectiveness.

Highlights

  • Endpoint control in BOF steelmaking has a critical impact on the most important performance metrics of this widely used process in world steel production: cost, productivity, and quality

  • The StaticDynamic models (SDMs) described in this paper is designed for Intermediate Stop Practice (ISP) technology with the turndown of converter (TD) test, predefined metallic charge, and does not include calculations for reblowing

  • There is no data on how much the estimates of phosphorus and sulfur content at the end of blowing contributed to the increase in the share of quick tapping

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Summary

Introduction

Endpoint control in BOF steelmaking has a critical impact on the most important performance metrics of this widely used process in world steel production: cost, productivity, and quality. The first step is performed based on the expected values of the essential parameters of hot metal ((Si,T)HMEXP), steel grade and the expected time from the end of the previous heat to the start of the heat (manual input this data by an operator).

Results
Conclusion

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