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| Effect of Hot Metal Charging Technology on Operation of 50 t EAF |
| LIU Qing1,HE Qingwen1,2,LIANG Jianguo1,2,DUAN Chonghu2,HAN Yonggang2 |
| 1. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China;2. Special Steel Plant, Laiwu Iron and Steel Co., Ltd., Laiwu 271100, Shandong, China |
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Abstract The development and application of hot metal charging on 50 t EAF special steel plant at Laiwu Iron and Steel Co., Ltd. is described. The optimal hot metal charging ratio obtained is 30% for gear steel as representative of low carbon steels and 40% for bearing steel as representative of high carbon steels. By system optimization of hot metal charging technology, the production rhythm between EAF and CCM was realized, and productivity was improved. The tap to tap time was shortened by 510 min, power consumption was reduced by 80110 kW·h/t, temperature loss and overheat of molten steel in tundish was reduced by 1525 ℃. Moreover, the content of tramp elements in EAF bath was effectively diluted, heat number of sequence casting was increased to 162, and operation of EAF and CCM was balanced.
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Received: 01 January 1900
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2006, Vol. 41 
