高碳钢中包渣连铸过程理化性能的劣化演变研究

胡淏; 王先扬; 吴晨辉; 石鹏; 谢鑫; 曾建华; 龙木军; 陈登福

doi:10.7513/j.issn.1004-7638.2024.01.017

高碳钢中包渣连铸过程理化性能的劣化演变研究

doi: 10.7513/j.issn.1004-7638.2024.01.017

胡淏^{1, 2,},
王先扬^{1, 2},
吴晨辉²,
石鹏³,
谢鑫²,
曾建华²,
龙木军^1, ,,
陈登福¹

1.
重庆大学材料科学与工程学院, 重庆 400044
2.
钒钛资源综合利用国家重点实验室, 四川攀枝花 617000
3.
攀钢集团攀枝花钢钒有限公司, 四川攀枝花 617000

基金项目: 国家自然科学基金（U1960113）。

详细信息

作者简介:
胡淏，男，1997年出生，山西朔州人，硕士研究生，主要从事连铸方面基础研究，E-mail：huhaoms@cqu.edu.cn

通讯作者:
龙木军，1982年出生，男，博士，教授，主要从事连铸等方面研究，E-mail：longmujun@cqu.edu.cn

中图分类号: TF777
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- 文章访问数: 63
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- PDF下载量: 13
- 被引次数: 0
出版历程
- 收稿日期: 2023-10-12
- 刊出日期: 2024-02-29

Study on deterioration of physicochemical properties of tundish slag for high carbon steel during continuous casting process

Hu Hao^{1, 2
,},
Wang Xianyang^{1, 2},
Wu Chenhui²,
Shi Peng³,
Xie Xin²,
Zeng Jianhua²,
Long Mujun^{1
, ,},
Chen Dengfu¹

1.
College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
2.
State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization, Panzhihua 617000, Sichuan, China
3.
Panzhihua Steel and Vanadium Co., Ltd., Pangang Group, Panzhihua 617000, Sichuan, China

摘要

摘要: 中包渣在浇铸过程中保持良好的理化性能对稳定钢液纯净度具有重要意义。针对高碳钢中间包在连铸过程中各炉次的中包渣的理化性能进行测试研究，并利用Factsage对熔渣的高温物相进行热力学计算，分析其成分、熔点、粘度、表面张力演变规律。结果表明，中间包冲击区与浇注区渣的理化性能呈现不同的变化规律。随浇注炉次的增加，浇注区中包渣的SiO₂与MgO含量明显升高，由于高熔点组分增多，完全融化温度由1325 ℃升高到1500 ℃以上，粘度上涨接近10倍、表面张力由0.4 N/m上涨到0.8 N/m，中包渣对夹杂物的吸附能力变差。而冲击区中包渣变化规律与浇注区相反，在冲击区容易发生卷渣。
- 连铸 /
- 中包渣 /
- 理化性能 /
- 夹杂物
Abstract: Well keeping physicochemical properties of tundish slag during continuous casting is of great significance to stabilize the cleanness of molten steel. In this study, the physicochemical properties of tundish slag for high carbon steel bloom in the process of continuous casting were tested and studied, and the high-temperature phase of molten slag was calculated by a Factsage software, and the evolution laws of its composition, melting point, viscosity and surface tension were analyzed. The results show that the physicochemical properties of slag in tundish pouring zone and impact zone show different changing evolution. With the increase of casting heats, the SiO₂ and MgO contents of tundish slag in casting zone increase significantly. Due to the increase of high melting point components, the complete melting temperature rises from 1325 ℃ to more than 1500 ℃, the viscosity rises nearly 10 times, the surface tension rises from 0.4 N/m to 0.8 N/m, and the adsorption capacity of tundish slag to inclusions becomes poor. The change law of impact zone is opposite to that of pouring zone, and slag entrapment is easy to occur in the impact zone.
- continuous casting /
- tundish slag /
- physicochemical properties /
- inclusions

HTML全文

图 1 中包渣成分演变规律

（a）浇注区；（b）冲击区

Figure 1. Evolution of composition of tundish slag

下载: 全尺寸图片幻灯片

图 2 CaO-SiO₂-MgO-Al₂O₃(20%)相图，1500 ℃

Figure 2. Phase diagram of CaO-SiO₂-MgO-Al₂O₃(20%)，1500 ℃

下载: 全尺寸图片幻灯片

图 3 1500 ℃时浇注区各炉次中包渣中液相含量

Figure 3. Liquid phase content in tundish slag of each casting heat in pouring zone at 1500 ℃

下载: 全尺寸图片幻灯片

图 4 中包渣熔点演变规律

Figure 4. Evolution law of melting point of tundish slag

下载: 全尺寸图片幻灯片

图 5 1500 ℃时中包渣粘度演变规律

Figure 5. Evolution law of viscosity of tundish slag at 1500 ℃

下载: 全尺寸图片幻灯片

图 6 钢—渣界面黏附功演变规律

Figure 6. Evolution of adhesion work at metal/slag interface

下载: 全尺寸图片幻灯片

表 1 原始中包渣成分

Table 1. Composition of original tundish slag %

CaO MgO SiO₂ Al₂O₃ F 其他物质
（可挥发成分）

40～50 0～10 5～10 30～40 1～5 0～10

下载: 导出CSV

表 2 ${\varphi }_{{\rm{ms}}(i)}$的参考值

Table 2. ${\varphi }_{{\rm{ms}}(i)}$ data

i组元 ${\mathit{\varphi } }_{{{\rm{m}}}{{\rm{s}}}(\mathit{i})}$/ kJ

SiO₂ 0.597
Al₂O₃ 0.468
MgO 0.687
CaO 0.607
CaF₂ 0.326

下载: 导出CSV

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