ER70-Ti钢结晶器保护渣渣膜分布数值模拟

王杏娟; 孔麒畅; 朴占龙; 朱立光; 魏天烁

doi:10.7513/j.issn.1004-7638.2025.02.018

ER70-Ti钢结晶器保护渣渣膜分布数值模拟

doi: 10.7513/j.issn.1004-7638.2025.02.018

王杏娟^{1, 2,},
孔麒畅^{1, 2},
朴占龙^{1, 2},
朱立光³,
魏天烁^{1, 2}

1.
华北理工大学冶金与能源学院, 河北唐山 063210
2.
河北省高品质钢连铸技术创新中心, 河北唐山063000
3.
河北科技大学材料与工程学院, 河北石家庄 050000

基金项目: 国家自然科学基金项目（52374335，51974133，52304350）；河北省基本科研业务费资助项目（JST2022002）；唐山市科技计划资助项目（23130204E）

详细信息

作者简介:
王杏娟，1978年出生，女，河北邢台人，博士，教授，长期从事冶金工程及连铸方面的基础研究工作，E-mail：wxingjuan@ncst.edu.cn

中图分类号: TF777
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出版历程
- 收稿日期: 2024-04-02
- 刊出日期: 2025-05-06

Numerical simulation of slag film distribution in protective slag of ER70-Ti steel crystalliser

WANG Xingjuan^{1, 2
,},
KONG Qichang^{1, 2},
PIAO Zhanlong^{1, 2},
ZHU Liguang³,
WEI Tianshuo^{1, 2}

1.
College of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063210, Hebei, China
2.
Hebei High Quality Steel Continuous Casting Technology Innovation Centre, Tangshan 063000, Hebei, China
3.
College of Materials and Engineering, Hebei University of Science and Technology, Shijiazhuang 050000, Hebei, China

摘要

摘要: CaO-Al₂O₃-TiO₂基专用保护渣有效解决了ER70-Ti钢生产中的钢渣界面反应严重的难题，但是否能形成合理结构的液/固渣膜，对于进一步提升铸坯质量意义重大。文中利用有限元软件建立了ER70-Ti钢连铸结晶器传热模型及渣膜传热模型，分析了结晶器内液/固渣膜沿拉坯方向的不均匀分布，并探讨了拉速、浇注温度等工艺参数对液态渣膜分布的影响。结果表明：在结晶器出口处，铸坯侧的渣膜温度范围为777.87～1113.3 ℃；结晶器侧渣膜温度较低，为89.92～450.54 ℃。沿拉坯方向，液态渣膜的厚度逐渐减小，而固态渣膜厚度逐渐增加，最大厚度可达1.168 mm。进一步分析发现，拉速的提高有利于增大液态渣膜的厚度，拉速每提高0.2 m/min，液态润滑区的长度平均可延长40 mm。当浇注温度从1530 ℃升高到1550 ℃时，表面中心处液态渣膜厚度从0.252 mm增加到0.272 mm，结晶器出口处液态渣膜厚度从0 mm增加到0.036 mm。
- ER70-Ti钢 /
- 凝固传热 /
- 渣膜结构 /
- 数学模拟
Abstract: The CaO-Al₂O₃-TiO₂-based protective slag effectively solves the problem of serious slag interface reaction in the production of ER70-Ti steel, but it is still unknown whether a liquid/solid slag film with reasonable structure can be formed. In this study, the finite element software was used to establish a heat transfer model and a slag film heat transfer model for ER70-Ti steel, to analyse the changes of liquid/solid slag film in the crystallizer and to explore the influence of process parameters on the distribution of liquid slag film. The results show that the temperature of the slag film on the billet side ranges from 777.87 to 1113.3 ℃ at the exit of the mould; the temperature of the slag film on the mould side is lower, ranging from 89.92 to 450.54 ℃. Along the direction of billet drawing, the thickness of liquid slag film decreases gradually, while the solid slag film thickens gradually, and the maximum thickness is up to 1.168 mm. The increase of drawing speed is conducive to the increase of the thickness of liquid slag film, and every increase of the drawing speed by 0.2 m/min, the liquid lubrication zone can be lengthened by an average of 40 mm. When the pouring temperature is increased from 1530 to 1550 ℃, the thickness of the liquid slag film at the centre of the surface increases from 0.252 to 0.272 mm, and the liquid slag film thickness at the outlet of the crystalliser increased from 0 to 0.036 mm.
- ER70-Ti steel /
- solidification heat transfer /
- slag film structure /
- mathematical simulation

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图 1 切片建模示意

（a）铸坯计算流程；（b）1/4铸坯模型

Figure 1. Schematic of slice modelling

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图 2 有限元网格划分

Figure 2. Finite element meshing

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图 3 渣膜传热模型

Figure 3. Slag film heat transfer model

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图 4 渣膜横向温度梯度

Figure 4. Slag film transverse temperature gradient

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图 5 渣膜坐标位置

Figure 5. Slag film coordinates location

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图 6 渣膜温度分布

(a) 铸坯侧；(b) 结晶器侧

Figure 6. Slag film temperature distribution

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图 7 液态渣膜沿浇铸方向厚度变化

Figure 7. Thickness variation of liquid slag film along casting direction

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图 8 固态渣膜沿浇铸方向的厚度变化

Figure 8. Thickness variation of solid slag film along the casting direction

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图 9 拉速对液态渣膜厚度的影响

Figure 9. Effect of drawing speed on slag film thickness

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图 10 浇注温度对液态渣膜厚度的影响

Figure 10. Effect of casting temperature on the thickness of liquid slag film

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表 1 ER70-Ti钢成分

Table 1. ER70-Ti steel composition %

C Si Mn S P Ni Mo Cr Ti

0.07～0.09 0.48～0.58 1.58～1.68 ≤0.008 ≤0.01 0.8～0.9 0.38～0.39 0.18～0.28 0.09～0.12

下载: 导出CSV

表 2 保护渣的物性参数

Table 2. Physical parameters of protective slag

熔化
温度/℃ 黏度/
(Pa·s) 热阻/
(W·m⁻²·℃⁻¹) 密度/
(kg·m⁻³) 导热系数/
(W·m⁻¹·K⁻¹)

1 070 0.37 1.34 1 500 1.45

下载: 导出CSV

参考文献(15)

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ER70-Ti钢结晶器保护渣渣膜分布数值模拟

doi: 10.7513/j.issn.1004-7638.2025.02.018

作者简介:
王杏娟，1978年出生，女，河北邢台人，博士，教授，长期从事冶金工程及连铸方面的基础研究工作，E-mail：wxingjuan@ncst.edu.cn

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Numerical simulation of slag film distribution in protective slag of ER70-Ti steel crystalliser

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目录

C	Si	Mn	S	P	Ni	Mo	Cr	Ti
0.07～0.09	0.48～0.58	1.58～1.68	≤0.008	≤0.01	0.8～0.9	0.38～0.39	0.18～0.28	0.09～0.12

熔化温度/℃	黏度/ (Pa·s)	热阻/ (W·m⁻²·℃⁻¹)	密度/ (kg·m⁻³)	导热系数/ (W·m⁻¹·K⁻¹)
1 070	0.37	1.34	1 500	1.45

留言板

ER70-Ti钢结晶器保护渣渣膜分布数值模拟

doi: 10.7513/j.issn.1004-7638.2025.02.018

作者简介: 王杏娟，1978年出生，女，河北邢台人，博士，教授，长期从事冶金工程及连铸方面的基础研究工作，E-mail：wxingjuan@ncst.edu.cn

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出版历程

Numerical simulation of slag film distribution in protective slag of ER70-Ti steel crystalliser

计量

出版历程

目录

作者简介:
王杏娟，1978年出生，女，河北邢台人，博士，教授，长期从事冶金工程及连铸方面的基础研究工作，E-mail：wxingjuan@ncst.edu.cn