Experimental study on the behaviour of the submerged jet in a cold liquid metal model for continuous casting of round blooms under the influence of rotating magnetic fields

9th International Symposium on Electromagnetic Processing of Materials

材料科学;物理学

Schurmann, D.^1 ; Willers, B.^1 ; Eckert, S.^1

Helmholtz-Zentrum Dresden-Rossendorf E.V. (HZDR), Bautzner Landstraße 400, Dresden

01328, Germany^1

关键词: Continuous casting of steels;    Electromagnetic stirrers;    Liquid metal model;    Magnetic field strengths;    Rotating magnetic fields;    Solidified shell;    Ultrasound Doppler velocimetry;    Velocity profiles;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/424/1/012005/pdf
DOI  :  10.1088/1757-899X/424/1/012005

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Experimental results were obtained at the Mini-LIMMCAST facility [1], an experimental setup to model continuous casting of steel operated continuously as a loop with the cold liquid metal alloy GaInSn. The setup consists of a round mould with an inner diameter of 80 mm, representing a mould used in industrial bloom casting in a scale of 1:3. A mould-electromagnetic-stirrer (M-EMS) generated a rotating magnetic field (RMF) with different magnetic flux densities. Velocity profiles inside the mould were measured by Ultrasound Doppler Velocimetry (UDV). The experiments revealed an unexpected behaviour of the submerged jet: for medium magnetic field strengths of the RMF it can be observed, that the jet stops circling and stays at one position in the mould, bearing the risk of breakout due to continuous impingement of superheated material to one position of the solidified shell.