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Development and investigation of advanced process model for secondary cooling in continuous casting of molten steel |
CHEN Deng-fu1,2, XU Pei1,2, LONG Mu-jun1,2, DUAN Hua-mei1,2, YANG Jie1,2, WU Shi-xin1,2 |
1. College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China; 2. Chongqing Key Laboratory of Vanadium-Titanium Metallurgy and New Materials, Chongqing 400044, China |
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Abstract The effect of secondary cooling in molten steel continuous casting will directly influence the quality of the strand. To control the secondary cooling process reasonably,several kinds of static and dynamic control process models have been proposed. The development of static and dynamic control process models for secondary cooling is systematically reviewed,for example,the secondary cooling control process model of the linear or quadratic relationship between water flow and casting speed in the secondary cooling zone,the dynamic control process model of secondary cooling based on the modified effective casting speed,and the dynamic control process model of secondary cooling based on on-line heat transfer calculation method etc.. Besides,the advanced process model of secondary cooling control based on the superheat of molten steel and inlet temperature of secondary cooling,and the dynamic process model of secondary cooling control based on on-line temperature measurement and then feedback regulation of water flow in every circuit are proposed. With the development of secondary cooling control process models,the real-time control,reliability,accuracy,and stability of operation are gradually improved,thus laying a necessary foundation for high-quality slab manufacturing and intelligent secondary cooling control.
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Received: 04 June 2019
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