Abstract: In order to improve the accuracy of slab weight determination, a multi-model system was established to cover the influencing factors of continuous casting process, reduce the influence of molten steel composition, mould wear, superheat and casting speed on slab quality. Feedback mode combining feed-forward and feed-back was adopted to improve the accuracy and stability of slab weight determination system. The field implementation shows that the precision of slab fixed-weight has been greatly improved, and the proportion of continuous casting slab whose quality deviation is less than 8 kg has increased from 42.4 % to 81.2 %. It is advantageous to improve the yield of rolling.

Key words: multi-model system, fixed-weight of continuous casting slab, accuracy