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Coil Ambient Temperature and Its Influence on the Formation of Blocking Layer in the Electromagnetic Induction-Controlled Automated Steel-Teeming System

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Acta Metallurgica Sinica(English Letters) 2019年第3期32卷 391-400页

作者： Ming He Xian-Liang Li Xing-An Liu Xiao-Wei Zhu Tie Liu Qiang Wang Key Laboratory of Electromagnetic Processing of Materials(Ministry of Education) Northeastern University School of Metallurgy Northeastern University School of Materials Science and Engineering Northeastern University

Ambient temperature of induction coil is an important factor to influence the implementation of the electromagnetic induction-controlled automated steel-teeming(eicast) technology. Meanwhile, it also affects the formation of Fe–C alloy blocking layer, which determines the length and installation position of induction coil. An experimental platform was designed to imitate actual working conditions in a ladle with the eicast system. Ambient temperature of induction coil under high-temperature condition was measured to verify the accuracy of numerical result. After containing molten steel for 120 min and steel teeming for 40 min, the ambient temperature on the upper side of induction coil is 791 °C. In addition, the position of blocking layer in a 110 t ladle was measured by sand-collection and steel-pour methods, and the criterion temperatures of blocking layer in numerical simulation process were corrected. When the refining temperature is1600 °C and the containing time of molten steel is 120 min, the thickness of blocking layer is 130 mm, and the distance between the upper surface of blocking layer and the upper surface of nozzle brick is 154 mm. When the criterion temperatures are 919 °C and 428 °C, the numerical results can be used to confirm the position of blocking layer and the installation position of induction coil.

关键词： Clean steel eicast technology Heat transfer Blocking layer Coil ambient temperature

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