Steelworks control of residuals

Abstract
B. S. C. Sheffield Division, Steelworks Group, is a major producer of engineering carbon and alloy steels from a cold metal charge. The continued recycling of material, together with the necessity for tight property and processing requirements, from considerations both of the end user and the internal works, has increased the demands for residual control while maintaining cost competitiveness. The restrictions imposed on the steel works are discussed together with their implications to production practice and their effect on overall scrap usage. In this context, the development and application of a mathematical model to describe the mechanism of residual enrichment is outlined along with the resultant imposition on scrap charging practices for special carbon steel grades. The effect of restrictions of this type are related to the overall works’ requirement and the benefits shown of using a least cost mix charging practice for the arc furnace. Some consideration is given to the practical application of such a procedure and the likely effect of future restrictions in residual element content on scrap requirement

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