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Acta Metall Sin  2011, Vol. 47 Issue (2): 219-223    DOI: 10.3724/SP.J.1037.2010.00418
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STATE OF Fe-C ALLOY IN THE ELECTROMAGNETIC STEEL-TEEMING SYSTEM
GAO Ao, WANG Qiang, LI Dejun, CHAI Haishan, ZHAO Lijia, HE Jicheng
Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang 110819
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GAO Ao WANG Qiang LI Dejun CHAI Haishan ZHAO Lijia HE Jicheng. STATE OF Fe-C ALLOY IN THE ELECTROMAGNETIC STEEL-TEEMING SYSTEM. Acta Metall Sin, 2011, 47(2): 219-223.

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Abstract  A new method (electromagnetic steel-teeming method) using electromagnetic induction heating in slide-gate was proposed to overcome the disadvantage of the pollution of the traditional nozzle sand on the molten steel. The basic idea of this new process is to melt part or whole of the new ladle well-packing material (i.e. Fe-C alloy with similar composition of the molten steel), which becomes the substitute of the traditional nozzle sand, and achieve smoothly molten steel-teeming. In the experiment, the state of the Fe-C alloy well-packed in the upper nozzle was examined when the ladle held molten steel using the self-designed electromagnetic steel-teeming simulation facility. The results showed that the F-C alloy in the upper nozzle were divided into liquid Fe-C alloy, solidified Fe-C alloy, liquid-sintered, solid-sintered and original layers. The solidified, liquid-sintered and solid-sintered layers could prevent the molten steel flow into the upper nozzle from destroing the slide plate. The blocking layers could be melted with induction heating to achieve electromagnetic steel-teeming. In addition, the position of the liquid/solid interface of the Fe-C alloy in the upper nozzle was investigated. The length of liquid Fe-C alloy increased with the increase of time after molten steel poured into the ladle and then kept in a certain length. Furthermore, the position of the interface increased with the increase of melting points which were related to the composition of the Fe-C alloy. The experimental results indicated that 100% automatically teeming of the ladle would be achieved after using the electromagnetic steel-teeming technology.
Key words:  nozzle sand      electromagnetic steel-teeming      clean steel      Fe-C alloy      induction heating     
Received:  20 August 2010     
ZTFLH: 

TF341.6

  
Fund: 

Supported by Science and Technology Program of Liaoning Province (No.2008221015), Liaoning Bai Qian Wan Talents Program and Program of Introducing Talents of Discipline to University (No.B07015)
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GAO Ao
YU Jiang
LI De-Jun
CI Hai-Shan
DIAO Li-Jia
SHI Ji-Cheng

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https://www.ams.org.cn/EN/10.3724/SP.J.1037.2010.00418     OR     https://www.ams.org.cn/EN/Y2011/V47/I2/219

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