Optimization of slag content to alleviate lining erosion for low carbon low phosphorous steel
LI Xiang1, WU Guo-ping1, YAN Chen1, SONG Shen-yang2, DAI Yu-xiang2
1. Technology Quality Department, Nanjing Iron and Steel Co., Ltd., Nanjing 210035, Jiangsu, China; 2. StateKey Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China
Abstract:The influence of (FeO) content, (MgO) content and basicity of slag of low carbon and low phosphorous steel has been studied through laboratory high temperature experiments and theoretical calculation on physicochemical property of slag. The w(FeO) was 31.5% and w(MgO) was 8% before optimization, the solid phase ratio was near 0% whatever the slag basicity was. It was difficult to remain final slags at the lining of the BOF furnace after slag splashing, hence slag splashing could hardly protect the lining. At 1 600 ℃,the solid phase ratio decreased when (FeO) content increased, and the solid phase ratio increased with (MgO) content and basicity of slag raise. The low (FeO) content and high (MgO) content could help to increase the solid phase ratio. It is more appropriate for the slag that w(FeO) is about 22.5%-27.0%, w(MgO) is about 8%-12% and basicity is about 3.6.
李翔, 吴国平, 闫辰, 宋沈杨, 戴雨翔. 减轻低碳低磷钢冶炼炉衬侵蚀及炉渣成分优化[J]. 中国冶金, 2021, 31(2): 65-71.
LI Xiang, WU Guo-ping, YAN Chen, SONG Shen-yang, DAI Yu-xiang. Optimization of slag content to alleviate lining erosion for low carbon low phosphorous steel[J]. China Metallurgy, 2021, 31(2): 65-71.
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