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| Study on Reducing Power Consumption of LF Refining |
| HU Jing-tao,WEI Jun ,LIU Shan-xi,WEI Guo-zeng ,LI Zhan-qing |
| Tangshan Iron and Steel Company, Hebei Iron and Steel Group, Tangshan 063016, Hebei, China |
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Abstract Based on the theoretical calculation, it is concluded that the power utilization ratio has nothing to do with the temperature rise speed; and the slag thickness should be larger than 50mm when gear 3 is used to refine. When the slag is thinner than 50mm, gear 4 is more effective to save power. Besides, gear 2 and gear 5 are not suggested for the purpose of temperature promotion only. According to real practice and theoretical calculation, it is found that when the bypass blowing is applied, the temperature drop is enhanced with the increase of initial temperature, and the heat dissipation of slag surface is reduced through improving the hit ratio of element adjustment at first time. On the basis of the practical process, the methods of reducing power consumption consisting of shortening the refining time, decreasing the utilization rate of non-turnover ladles and optimizing argon bottom blowing are also suggested, meanwhile compositions and temperatures of molten steel for different steel grades as they get in LF station are determined. According to these methods, the power consumption of LF was reduced by 6.8（kW·h）/t in present study.
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Received: 08 July 2013
Published: 28 March 2014
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2014, Vol. 49 
