| METALS AND METAL MATRIX COMPOSITES |
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| Numerical Simulation on Melting and Mixing of LaFe Alloy in Argon-Stirred Ladle |
| LIU Yubao1,2,3, WANG Jujin4,*, YANG Wen1, LIU Fengqin1,*, LI Yaqiong1, CUI Lingxiao1,2, ZHANG Yang2,3
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1 School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China
2 Baotou Research Institute of Rare Earths, State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization, Baotou 014030, Inner Mongolia, China
3 National Engineering Research Center of Rare Earth Metallurgy and Function Materials, Baotou 014030, Inner Mongolia, China
4 School of Mechanical and Materials Engineering, North China University of Technology, Beijing 100144, China |
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Abstract The melting and mixing phenomena of LaFe alloys during the argon stirring in a ladle was studied using a Eulerian-Lagrangian multiphase approach. Effects of the argon blowing system and the alloy grade on the melting and mixing of the alloy were investigated. Results show that the grade of LaFe alloy influenced its density and melting process in molten steel, and there was a linear relationship between melting time and its grade. The higher the grade was, the shorter the melting time was. The argon blowing with double nozzles was the best way to mix the alloy, followed by single nozzle eccentric argon blowing. The mixing of alloy at the bottom of the ladle was inefficient when the steel was stirred central argon blowing. Under the condition of argon blowing position of 0.8R and argon blowing flow rate of 100 NL/min, the maximum mixing time of pure La metal was less than 300 s, while that of 20LaFe and 50LaFe was more than 320 s. On the premise of acceptable alloy yield, the alloy grade should be increased as much as possible to reduce the mixing time.
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Published: 10 November 2022
Online: 2022-11-03
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| Fund:National Natural Science Foundation of China(U1860206, 51725402, 51874032), Provincial Science and Technology Plan of Hebei Province(20311006D), Inner Mongolia Autonomous Region Science and Technology Major Special Project(ZDZX2018032), and Inner Mongolia Autonomous Region Achievement Transformation Project(2019CG083). |
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2022, Vol. 36 
