板坯连铸铸流电磁搅拌辊的设计与应用

doi:10.13228/j.boyuan.issn1005-4006.20210132

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Abstract The finite element analysis software is used to design the magnetic circuit structure and application parameters of the slab casting electromagnetic stirring roller. According to the roll chart of the continuous caster, the installation position of the electromagnetic stirring roll of the casting flow and the equiaxed crystal rate under each process parameter are calculated. On the basis of satisfying the installation space, the parameters such as the optimal ampere-turns, magnetic field strength, electromagnetic force, temperature distribution of each component of the stirring roller, and the amount of deformation of the roller sleeve under a certain iron core size are calculated. The simulation results show that the electromagnetic stirring roller installed in the No.1 and No.9 positions of the sector section 1 can obtain an equiaxed crystal rate of 47.6%-61.6%. Under the size of the roller sleeve diameter of 240 mm, combined with the winding space and installation space, the maximum size of the iron core is 127 mm, and the maximum current under this iron core size is 400 A. The calculated temperature distribution of the stirring roller and the deformation of the roller sleeve guide the design of the cooling water volume and the mechanical structure of the project. The experimental results show that the magnetic induction intensity of the numerical simulation is basically consistent with the magnetic field intensity of the actual test. Through the actual operation results, it is found that the designed cooling water volume meets the cooling requirements. When casting 400 series stainless steel slab with a pouring cross-section of 200 mm×1 000 mm, when the drawing speed is 0.9 m/min, the equiaxed crystal rate of the slab is 55%, which is basically consistent with the design value. The simulation results correctly guide the design and application of the electromagnetic stirring roll for slab casting.

Key words： numerical simulation slab caster electromagnetic stirring magnetic field equiaxed crystal rate

Received: 13 November 2021

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	LI Hua-gang

Cite this article:

LI Hua-gang. Design and application of electromagnetic stirring roll for slab continuous casting machine[J]. CONTINUOUS CASTING, 2022, 41(3): 56-64.

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http://www.chinamet.cn/Jweb_lz/EN/10.13228/j.boyuan.issn1005-4006.20210132 OR http://www.chinamet.cn/Jweb_lz/EN/Y2022/V41/I3/56

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