| 防止超低碳铝镇静钢大方坯连铸水口堵塞的工艺实践 |
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| 引用本文： | 马富平,包燕平,董志强.防止超低碳铝镇静钢大方坯连铸水口堵塞的工艺实践[J].特殊钢,2014,35(1):23-25. |
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| 作者姓名： | 马富平 包燕平 董志强 |
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| 作者单位： | 1北京科技大学冶金与生态工程学院，北京100083；
2 邢台钢铁有限责任公司，邢台054027 |
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| 摘 要： | 研究了铁水脱硫预处理-80 t顶底复吹转炉-LF-RH-280 mm×325 mm方坯连铸流程生产XGM6钢(/%:0.012C, ≤0.012Si, ≤0.08Mn, ≤0.015P, ≤0.010S)等超低碳铝镇静钢时水口堵塞的原因和防止措施。通过控制转炉终点O]≤600×10-6, LF顶渣为高铝渣+电石,RH-OB脱碳后加铝粒脱氧,控制RH终点氧含量20×10-6~30×10-6, RH终点Al]s≤0.009%,中间包钢水过热度25~40℃,Al]s≤0.004%等工艺措施,基本避免超低碳铝镇静钢水口堵塞,连浇炉数由不足2炉提高到8炉以上。
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| 关 键 词： | 超低碳铝镇静钢 水口堵塞 防止措施 [O] [Al]s |
| 收稿时间： | 2013-08-20 |
Practice of Process to Prevent Nozzle Clogging During Bloom Concasting of Ultra-Low-Carbon Aluminium-Killed Steel |
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| Ma Fuping,Bao Yanping,Dong Zhiqiang.Practice of Process to Prevent Nozzle Clogging During Bloom Concasting of Ultra-Low-Carbon Aluminium-Killed Steel[J].Special Steel,2014,35(1):23-25. |
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| Authors: | Ma Fuping Bao Yanping Dong Zhiqiang |
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| Affiliation: | 1 School of Metallurgical and Ecological Engineering, University of Science and Technology, Beijing 100083 ；
2 Xingtai Iron and Steel Corp Ltd, Xingtai 054027 |
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| Abstract: | The cause and preventing measures for nozzle clogging during steelmaking process of ultra-low-carbon aluminium-killed steel such as XGM6 steel (/%: 0. 012C, ≤0. 012Si, ≤0. 08Mn, ≤0. 015P, ≤0.010S) produced by hot metal pre-desulphurization process-80 t top and bottom combined blown converter-LF-RH-280 mm x325 mm bloom concasting flow sheet have been studied. With using the process measures including controlling converter end O] ≤600 x 10-6, LF top slag- high alumina slag + carbide, deoxidizing by adding aluminium shot after RH-OB decarburisation, controlling RH end O] 20 x 10-6 ~30 x 10-6, RH end Al]s ≤ 0. 009%, tundish liquid superheating extent 25 ~40 °C and Al]s≤0. 004%, the nozzle clogging of liquid of ultra-low-carbon aluminium-killed steel has basically been avoided, continuous- continuous casting heats increase from less than 2 heats to more than 8 heats. |
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