Specialized production practice and dynamic precision control of wide slab for low carbon steel
LI Da-peng1,2
1. State Laboratory of Advanced Steel Processing and Products, Central Iron and Steel Research Institute, Beijing 100081, China; 2. Steelmaking Plant, Benxi Iron and Steel Group Co., Ltd., Benxi 117021, Liaoning, China
Abstract：To straighten out the correspondence between furnaces and casters and speed up the steelmaking production rhythm, seven specialized production lines were established in the BOF steelmaking plant of Bensteel. Taking the wide slab production line for low carbon steel as an example, the rhythm matching analysis on process time of BOF, RH and CCM was carried out based on GANTT diagram, which indicated that BOF and CCM were the goals of the original process optimization. By increasing the oxygen supply intensity, increasing the bottom blowing flow rate in the last stage of blowing, decreasing the tapping and slag splashing time, optimizing the submerged entry nozzle structure, adjusting the mold cooling water density, employing the mold electromagnetic control technique, developing high speed casting mold flux and controlling the casting cycle, the whole rhythm of three processes of BOF, RH and CCM was precisely reduced to 32-34 min from an average of 46 min. Consequently, the steelmaking production tended to be efficient, steady, dynamic and precise.
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LI Da-peng. Specialized production practice and dynamic precision control of wide slab for low carbon steel[J]. China Metallurgy, 2020, 30(2): 33-39.
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2020, Vol. 30 
