Application and practice of intelligent electromagnetic stirring control system in continuous casting process
LIU Zhi-yuan1,2, DING Ning2, WANG Chong-jun2, GUO Wen-bin2, LUO Cheng2, LÜ Si-run3
1. School of Metallurgy, Northeastern University, Shenyang 110819, Liaoning, China; 2. Steel Making Department, HBIS Tangshan Medium Thickness Plate Co., Ltd., Tangshan 063000, Hebei, China; 3. Technology Department,Hebei Golden Century Electric Co., Ltd., Shijiazhuang 050000, Hebei, China
Abstract：Electromagnetic stirring is an effective way to improve the internal quality of slab and expand the production variety. In order to solve the quality problems that the ratio of C-grade products was only 45.48% and the proportion of central porosity was 14.72% before electromagnetic stirring in the secondary cooling zone of No.3 slab caster, the intelligent control system of electromagnetic stirring was implemented. When the technological conditions such as drawing speed, tundish temperature and steel grade changed, the oscillating magnetic field was formed by the current fluctuation in real time. At the same time, the process is optimized comprehensively by means of molten steel purity, roll gap precision, narrow temperature and narrow composition control.The results show that the ratio of C-grade increases from 45.48% to 100%, the proportion of center porosity decreases from 14.72% to 0, and the pass rate of steel plate flaw detection increases from 95% to more than 99.80%, reaching the quality control level of billet equipped with soft reduction casting machine.
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2021, Vol. 40 
