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“第十届中国钢铁年会”暨“第六届宝钢学术年会”

作者： Liu Xingan Li Dewei Wang Qiang Su Zhijian Zhu Xiaowei He Jicheng Key Laboratory of electromagnetic Processing of Materials（Ministry of Education） Northeastern University

The development and promotion of clean steel technology is one of the hot issues and it has important applications in steel industry, although there are some difficulties should be resolved. New generation of electromagnetic metallurgical technologies could dramatically improve steel cleanliness, so as to achieve the purpose of improving the quality of steel and increasing productivity. In this paper, two representative technologies are introduced. One is an electromagnetic induction-controlled automated steel-teeming, the other one is a technology of electromagnetic swirling flow in the submerged entry nozzle（SEN）. The basic idea of the first one is using an induction coil located in the nozzle brick to melt part or all of the new well-packing material（i.e., Fe-C alloy with a similar composition of molten steel）, which replaces the conventional nozzle sand, and to obtain smooth automated steel teeming. In the latter technology, a rotating electromagnetic field is set up around the SEN to induce swirling flow in it by the Lorentz force without contact with the steel. This technology could avoid nozzle clogging, and has great effect on improving the uniformity and stability of the outlet flow. It could also reduce the meniscus fluctuation, homogenize the distributions of flow and temperature in the mold. The development and promotion of these kind of electromagnetic metallurgical technologies has great significance for the production of clean steel in future.

关键词： electromagnetic metallurgy clean steel electromagnetic steel-teeming electromagnetic swirling flow continuous casting electromagnetic processing of materials

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Inhibiting bulging deformation of liquid metal free surface by magnetic pressure

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Journal of Iron and Steel Research International 2021年第7期28卷 818-829页

作者： Yang Li An-yuan Deng Bin Yang Hao Xu En-gang Wang Key Laboratory of electromagnetic Processing of Materials(Ministry of Education) Northeastern UniversityShenyang 110004LiaoningChina School of metallurgy Northeastern UniversityShenyang 110004LiaoningChina

A new method was presented to inhibit bulging deformation and fluctuation of free surface by magnetic pressure.A research combined with numerical and experimental methods was conducted to investigate the feasibility and inhibition *** parameters including magnetic flux density,frequency and action area of magnetic pressure were *** results show that the method is feasible,and the bulged free surface is fully inhibited by the proper magnetic *** inhibition efficiency increases as the increase in magnetic flux density and frequency,which shows a linear rela-tionship with the magnetic flux *** frequency has a great influence on the inhibition efficiency when the frequency is changed from 0.15 to 5.00 ***,the frequency more than 5.00 kHz has little influence on the inhibition efficiency and is recommended in application *** the ratio of the action area to the area of bulged free surface is 0.8,the best inhibition is ***,when the ratio is more than 1.2,a distinct W-shaped free surface is *** surficial and internal flow is strengthened with proper magnetic pressure ***,under the action of magnetic pressure,the fluctuation amplitude of free surface decreases from 4.0 to 1.2 mm and the main fluctuation with frequency of 2.34 Hz is dispersed into several minor fluctuations with frequency of 0.4-4.3 Hz.

关键词： Magnetic pressure High-frequency electromagnetic field Level fluctuation Level deformation Skin effect electromagnetic metallurgy

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Effects of Steel Teeming in New Slide Gate System with electromagnetic Induction

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Journal of Iron and Steel Research International 2015年第1期22卷 30-35页

作者： Qiang WANG De-jun LI Xing-an LIU Xue-bin WANG Jie DONG Ji-cheng HE Key Laboratory of electromagnetic Processing of Materials(Ministry of Education) Northeastern University Technology Center Angang Steel Co.Ltd. Technology Center Shandong Laiwu Iron and Steel Group

Steel teeming time is a very important parameter in the new slide gate system with electromagnetic induction （called electromagnetic steel teeming system）, and how to shorten this time is a key to realize application of the new system in continuous casting. The effects of power parameters, coil position, nozzle material and other factors on the steel teeming time were investigated by a self-designed electromagnetic steel teeming system in detail. The experimental results show that the relationship between power and steel teeming time is nonlinear. The coil position has great in- fluence on steel teeming time. And the upper nozzle with high permeability can reduce the teeming time. In addition, the steel teeming time becomes minimum when the size of the spherical cast iron particles is 2.0 ram. This research can provide technical references for the industrial application of the new electromagnetic steel teeming system.

关键词： continuous casting clean steel automatic pouring electromagnetic metallurgy steel teeming

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Improvement of the Structure and the electromagnetic Characteristics of an Induction Ladle Furnace

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Advances in Manufacturing 1999年第2期3卷 69-72页

作者： Deng Kang Shen Min Ren Zhongming Jiang Guochang (School of Material Science and Engineering, Shanghai University) School of Material Science and Engineering Shanghai University

Based on a numerical analysis of the alternating electromagnetic field in the process of Steel refining with an induction ladle furnace (ILF), the optimization of the structure of ILF and the electromagnetic field for melting is realized in the present work. The optimization of the ILF by outward extension of inner yokes can decrease the magnitic flux leakage obviously, reduce the eddy current energy loss dramatically and then, decrease the total power consumption.

关键词： induction ladle furnace secondary refining electromagnetic metallurgy

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