| 低碳低硅-铝镇静钢C4C-Q工艺优化实践 |
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| 引用本文： | 杨建,黄治成. 低碳低硅-铝镇静钢C4C-Q工艺优化实践[J]. 特殊钢, 2022, 43(2): 59-63 |
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| 作者姓名： | 杨建 黄治成 |
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| 作者单位： | 湖南华菱湘潭钢铁有限公司，湘潭411101 |
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| 摘 要： | 对 120t BOF-LF-RH-CC 流程生产的低碳低硅-铝镇静钢 C4C-Q(/％:0.02～0.06C,≤0.06Si,0.02～0.05Al)冶炼硅含量高,可浇性差的原因进行了分析.通过工艺优化,转炉采用出钢两次挡渣模式和出钢后脱碳工艺,降低出钢氧含量,减少后期脱氧过程中生成Al2O3夹杂;通过优化LF脱氧模式...
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| 关 键 词： | 低碳低硅 铝镇静钢 可浇性 |
| 收稿时间： | 2021-07-26 |
Optimization Practice of Process for Low Carbon and Low Silicon-Aluminum Killed Steel C4C-Q |
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| Yang Jian,Huang Zhicheng. Optimization Practice of Process for Low Carbon and Low Silicon-Aluminum Killed Steel C4C-Q[J]. Special Steel, 2022, 43(2): 59-63 |
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| Authors: | Yang Jian Huang Zhicheng |
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| Affiliation: | Hunan Hualin Xiangtan Iron and Steel Co Ltd, Xiangtan 411101 |
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| Abstract: | The causes of the exceeding silicon content and poor pour ability of low carbon and low silicon-aluminum killed steel C4C-Q (/% ：0. 02 ~0. 06C, ≤ 0. 06Si,0. 02 ~0. 05Al) produced by 120 t BOF-LF-RH-CC flow sheet are analyzed. Through process optimization, adopting BOF tapping twice slag blocking mode and decarburizing process after tap, molten steel to decrease tap oxygen content and reduce Al2O3 inclusions forming in the later deoxidation process combining optimizing the deoxidation mode of LF furnace and adjusting the ladle bottom blowing stirring, the silicon increase in molten steel can be controlled within 0. 03% while the desulfurization is ensured, the [Si] ≤ 0. 045% in the tundish, the LF refining slag has good fluidity and strong ability to absorb inclusions ； by casting improving the protective effect during the start casting, adopting high liquid steel level when start casting of first furnace, to promote the inclusion in the tundish to float upwards, improve the molten steel temperature in the tundish, increase the static pressure of the molten steel at the same time, and reduce the Al2O3 inclusions nodulation on the inner wall of the nozzle, therefore good pour ability C4C-Q steel composition with /% ：0. 04 ~0. 06C,0. 034 ~ 0. 042Si and 0. 028 ~ 0. 034Al is produced. |
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