A New Off-Line Computer Model for Improving Width Reduction in Roughing Trains of Hot Strip Mills of Mobarakeh Steel Company

Abstract

Edging of slab is an important process to reduce and control width in the roughing area of hot strip mills. Width reduction amount that is required for edger in every pass is computed in the form of a very complicated on-line computer model. The model which previously was used for computation of width in roughing strip mill of Iran’s Foolad Mobarakeh Company did not have acceptable accuracy and caused many problems in final product width. Obviating these problems and adopting a reasonable and optimal way in allocating the width reduction amount of edger in every pass, the process of width reduction was put under close examination and an off-line computer model was written that precisely computes the width reduction. The performed computations by this model in roughing strip mill of this company were put to use; this was followed by very satisfactory results. Finally, according to the obtained results, the on-line model was corrected. Correction of the aforementioned model has had a significant effect in increase of quality and decrease of damages of hot strip mill products.