| 300t BOF-LF-RH冶炼过程X80管线钢氧含量控制 |
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| 引用本文： | 杨利彬,焦兴利,贺庆,刘浏.300t BOF-LF-RH冶炼过程X80管线钢氧含量控制[J].特殊钢,2011,32(6):40-42. |
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| 作者姓名： | 杨利彬 焦兴利 贺庆 刘浏 |
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| 作者单位： | 1. 钢铁研究总院冶金工艺研究所,北京,100081
2. 马钢第四钢轧总厂,马鞍山,243000 |
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| 摘 要： | X80管线钢（基本成分/%:0.09C、0.42Si、1.85Mn、0.022P、0.005S、0.06Als）的冶金流程为KR铁水脱硫预处理-300 t顶底复吹转炉-钢包吹氩-LF-RH-250 mm×2 150 mm板坯连铸。工艺炼钢和精炼主要优化工艺为:控制转炉出钢下渣量≤4 kg/t,采用（%）:55～60CaO、7～12SiO2、25～30Al2O3精炼渣系,控制LF精炼渣CaO/Al2O3=1.7～1.9,CaO/SiO2=4.5～6.0,（FeO+MnO）≤1.0%,吹氩站顶底吹氩预成渣,RH真空度≤66.7 Pa,RH后喂钙线0.8 kg/t。结果表明,转炉终点碳氧积由0.002 84降为0.002 44;精炼后（FeO+MnO）为0.913%,全氧含量为0.0013%。成品材夹杂物级别≤1.0。
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| 关 键 词： | 300 t顶底复吹BOF-LF-RH X80管线钢 预成渣 夹杂物 碳氧积 全氧含量 |
Control of Oxygen Content in X80 Pipe Line Steel during 300 t BOF-LF-RH Steelmaking Process |
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| Yang Libin,Jiao Xingli,He Qing,Liu Liu.Control of Oxygen Content in X80 Pipe Line Steel during 300 t BOF-LF-RH Steelmaking Process[J].Special Steel,2011,32(6):40-42. |
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| Authors: | Yang Libin Jiao Xingli He Qing Liu Liu |
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| Affiliation: | Yang Libin~1,Jiao Xingli~2,He Qing~1 and Liu Liu~1 (1 Metallurgical Process Research Institute,Central Iron and Steel Research Institute,Beijing 100081,2 No4 Steelmaking and Rolling General Plant,Ma'anshan Steel,Ma'anshan 243000) |
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| Abstract: | Flow sheet for X80 pipeline steel（basic composition /%:0.09C,0.42Si,1.85Mn,0.022P,0.005S, 0.06Als） is KR metal desulphurization pretreatment-300 t top and bottom combined blowing converter-ladle argon blowing-LF -RH-250 mm×2 150 mm slab casting process.The main steelmaking and refining optimizing processes are controlling converter tapping slag amount≤4 kg/t,using（%） 55～60CaO,7～12SiO2,25～30Al2O3,refining slag series to control LF refining slag CaO/Al2O3 = 1.7～1.9,CaO/SiO2 =4.5～6.0 and（FeO +MnO）≤1.0%,pre-forming slag at ladle argon blowing station with top and bottom argon blowing,RH vacuum≤66.7 Pa and feeding 0.8 kg/t calcium wire after RH treatment.Results show that carbon-oxygen product-C]O]at converter endpoint decreases to 0.002 44 from original 0.002 84,after refining（FeO + MnO） is 0.913%,TO]is 0.001 3%and rating of inclusions in products is 1.0. |
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| Keywords: | 300 t Top and Bottom Combined blowing Converter X80 Pipeline Steel Pre-formation Slag Inclusions Carbon-Oxygen Product Total Oxygen Content |
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