Optimization of strand and final electromagnetic stirrers of round bloom casters with multiple sections |
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Authors: | Rui Wang Yan-ping Bao Yi-hong Li Hang-Hang An |
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Affiliation: | 1. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China;2. School of Material Science and Technology, Taiyuan University of Science and Technology, Taiyuan 030024, China |
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Abstract: | Strand electromagnetic stirring (S-EMS) and final electromagnetic stirring (F-EMS) are the main methods used to improve the center porosity and segregation for round blooms. To optimize the stirring conditions, nail shooting tests were conducted for three sections of large round blooms with diameters of ?380 mm, ?450 mm, and ?600 mm. Acid leaching and sulfur print tests were used to investigate the shell thickness. Based on the results of nail shooting tests, a mathematical model of solidification was established, and the variation of shell thickness and the central solid fraction were exactly calculated by the model. By taking all sections into account, the locations of S-EMS and F-EMS were optimized for each section. In the results, the macro-segregation of various sections is improved after the locations of S-EMS and F-EMS systems are changed. |
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Keywords: | continuous casting electromagnetic stirring blooms mathematical models optimization |
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