板坯连铸浸入式水口及结晶器内钢液流态的研究现状分析

田玉石; 仇圣桃; 朱荣; 徐李军; 时朋召; 王旭

doi:10.7513/j.issn.1004-7638.2024.06.019

板坯连铸浸入式水口及结晶器内钢液流态的研究现状分析

doi: 10.7513/j.issn.1004-7638.2024.06.019

田玉石^{1, 2,},
仇圣桃^2, ,,
朱荣^{1, 3},
徐李军²,
时朋召²,
王旭²

1.
北京科技大学冶金与生态工程学院, 北京 100083
2.
钢铁研究总院连铸技术国家工程研究中心, 北京 100081
3.
北京科技大学碳中和研究院, 北京 100083

详细信息

作者简介:
田玉石，1985年出生，男，辽宁丹东人，工学博士，主要从事连铸工艺优化及铸坯质量控制研究工作，E-mail: yushi.tian@139.com

通讯作者:
仇圣桃，1965年出生，男，江苏扬州人，工学博士，正高级工程师，主要从事冶金材料技术领域基础理论及相关工艺控制等方面研发工作，E-mail: qiust@cisri.com.cn

中图分类号: TF777.1
计量
- 文章访问数: 34
- HTML全文浏览量: 12
- PDF下载量: 7
- 被引次数: 0
出版历程
- 收稿日期: 2023-06-19
- 网络出版日期: 2024-12-30
- 刊出日期: 2024-12-30

Review on the flow pattern of molten steel in the submerged entry nozzle and the mold of continuous casting slabs

Tian Yushi^{1, 2
,},
Qiu Shengtao^{2
, ,},
Zhu Rong^{1, 3},
Xu Lijun²,
Shi Pengzhao²,
Wang Xu²

1.
School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China
2.
National Engineering Research Center of Continuous Casting Technology, Central Iron and Steel Research Institute, Beijing 100081, China
3.
Institute for Carbon Neutrality, University of Science and Technology Beijing, Beijing 100083, China

摘要

摘要: 通过系统分析连铸水口及结晶器内钢液流态的研究现状，深入探讨了不同工况条件下流态的转变规律、共性特征、影响因素及其对铸坯质量的影响，并着重分析了结晶器流动的非对称性。认为：①水口内存在气泡流、膜状流、环状流和段塞流等多种流态，流态受液体流量、气体流量和中间包液位影响。其中，气泡流相对稳定，有利于连铸生产。②当板坯结晶器处于对称的双辊流状态，且液面流速控制在0.26～0.43 m/s时，有助于显著提高铸坯质量；同时，较高的拉速、较低的氩气流量以及增大的水口浸入深度有助于形成双辊流。③流动非对称性会引发偏流，通过精准的工艺操作可保障生产顺行并提高铸坯质量。
- 板坯连铸 /
- 结晶器 /
- 浸入式水口 /
- 流态 /
- 非对称流动
Abstract: Through a systematic analysis of the current researches on flow patterns in the nozzle and mold, this study explores the transformation laws, common characteristics, influencing factors, and their effects on slab quality under various operating conditions, with a particular focus on the asymmetry of flow in the mold. The conclusions are as follows: multiple flow patterns, including bubbly flow, film flow, annular flow, and slug flow, exist within the nozzle and are influenced by liquid flow rate, gas flow rate, and the level of liquid in the tundish. Bubbly flow is relatively stable and beneficial for continuous casting production. When the slab mold operates in a symmetric double-roll flow pattern and the mold surface flow velocity is controlled between 0.26 and 0.43 m/s, it significantly improves the quality of the cast slabs. Meanwhile, a higher casting speed, a lower argon flow rate, and an increased immersion depth of the nozzle have benefit for the formation of the double-roll flow pattern. Flow asymmetry can lead to bias flow. Thus, precise process control can ensure smooth production and enhance slab quality.
- slab continuous casting /
- mold /
- submerged entry nozzle /
- flow patterns /
- asymmetric flow

HTML全文

图 1 水口内的典型流态

Figure 1. The typical flow patterns present in a submerged entry nozzle

下载: 全尺寸图片幻灯片

图 2 水口内的段塞流及其破碎^[10]

Figure 2. The slug flow occurring inside the submerged entry nozzle and its breakup process^[10]

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图 3 水口内的典型流态（θ_w=77°）^[11]

Figure 3. The typical flow patterns present in a submerged entry nozzle (θ_w=77°)^[11]

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图 4 水口内的典型流态（θ_w=104°）^[11]

Figure 4. The typical flow patterns present in a submerged entry nozzle (θ_w=104°)^[11]

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图 5 水口内的典型流态^[13]

（a）高氩气流量；（b）低氩气流量

Figure 5. The typical flow patterns present in a submerged entry nozzle^[13]

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图 6 不同材质的水口内的流态对比^[11]

Figure 6. Comparison of flow patterns inside the submerged entry nozzle influenced by different material conditions^[11]

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图 7 板坯结晶器内的典型流态示意^[24]

（a）双辊流；（b）复杂流；（c）单辊流

Figure 7. Schematic representation of typical flow patterns inside the slab mold^[24]

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图 8 Krupp-Hoesch钢厂3^#板坯连铸机流态监测

（a）流态类型^[25]；（b）弯月面流示意^[31]

Figure 8. Flow pattern monitoring of the No. 3 slab caster at the Krupp-Hoesch steel plant

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图 9 结晶器内流动的非对称性数学模拟

（a）t=518.33 s; （b）t=522.33 s

Figure 9. Mathematical simulation of asymmetry in mold flow

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板坯连铸浸入式水口及结晶器内钢液流态的研究现状分析

doi: 10.7513/j.issn.1004-7638.2024.06.019

作者简介:
田玉石，1985年出生，男，辽宁丹东人，工学博士，主要从事连铸工艺优化及铸坯质量控制研究工作，E-mail: yushi.tian@139.com

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仇圣桃，1965年出生，男，江苏扬州人，工学博士，正高级工程师，主要从事冶金材料技术领域基础理论及相关工艺控制等方面研发工作，E-mail: qiust@cisri.com.cn

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Review on the flow pattern of molten steel in the submerged entry nozzle and the mold of continuous casting slabs

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留言板

板坯连铸浸入式水口及结晶器内钢液流态的研究现状分析

doi: 10.7513/j.issn.1004-7638.2024.06.019

作者简介: 田玉石，1985年出生，男，辽宁丹东人，工学博士，主要从事连铸工艺优化及铸坯质量控制研究工作，E-mail: yushi.tian@139.com

通讯作者: 仇圣桃，1965年出生，男，江苏扬州人，工学博士，正高级工程师，主要从事冶金材料技术领域基础理论及相关工艺控制等方面研发工作，E-mail: qiust@cisri.com.cn

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Review on the flow pattern of molten steel in the submerged entry nozzle and the mold of continuous casting slabs

计量

出版历程

目录

作者简介:
田玉石，1985年出生，男，辽宁丹东人，工学博士，主要从事连铸工艺优化及铸坯质量控制研究工作，E-mail: yushi.tian@139.com

通讯作者:
仇圣桃，1965年出生，男，江苏扬州人，工学博士，正高级工程师，主要从事冶金材料技术领域基础理论及相关工艺控制等方面研发工作，E-mail: qiust@cisri.com.cn