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Development of equipment and technology for hot charging pretreatment basing on casting segment of slab |
LIU Yang1, ZHU Guo-sen1, ZHU Zhi-yuan2, WANG Guo-lian3, TIAN Zhi-hong1, LIU Peng-tao4 |
1. Technical Research Institute, Shougang Group Co., Ltd., Beijing 100043, China; 2. Chief Engineer Office,Shougang Group Co., Ltd., Beijing 100043,China; 3. Steel Making and Rolling Department,Shougang Jingtang United Iron and Steel Co.,Ltd., Tangshan 063210, Hebei, China; 4. Metallurgical Branch Project Management Department, Beijing Shougang International Engineering Technology Co., Ltd., Beijing 100043, China |
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Abstract As an important technology of steel rolling interface, hot charging and hot delivery of continuous casting slab plays a key role in green carbon reduction, improving yield and shortening production cycle. The limiting link for the continuous improvement of the hot charging temperature and proportion of microalloyed steel continuous casting slab is the hot charging crack defect on the surface of the steel plate. In view of this problem, Shougang independently designed and developed a complete set of technology, equipment and control system for the hot charging pretreatment of slab based on the caster sector, which realized the refinement and toughening of the surface structure of high-temperature slab, and eliminated the “red feeding crack” defect on the surface of high-temperature hot charging rolled products. The problems such as bending deformation and cooling uniformity of high-temperature slab under rapid cooling conditions are solved, the internal temperature of high-temperature slab is retained to the maximum, and the overall hot charging temperature is increased. Compared with similar technologies, it has better economy and replicability.
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Received: 02 June 2022
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