CaO-Al2O3-V2O5渣系<styled-content style-type="number">1600</styled-content> ℃相平衡关系研究

郝冠迪; 邱吉雨; 龚恒辉; 刘源; 姜茂发

doi:10.7513/j.issn.1004-7638.2024.05.019

CaO-Al₂O₃-V₂O₅渣系1600 ℃相平衡关系研究

doi: 10.7513/j.issn.1004-7638.2024.05.019

郝冠迪^{1, 2,},
邱吉雨^{1, 2, ,},
龚恒辉^{1, 2},
刘源^{1, 2},
姜茂发^{1, 2}

1.
东北大学多金属共生矿生态化冶金教育部重点实验室, 辽宁沈阳 110819
2.
东北大学冶金学院, 辽宁沈阳 110819

基金项目: 东北大学大学生创新创业训练计划项目（S202210145205）；国家自然科学基金（52104327）；中央高校基本科研业务费项目（N2224001）；博士后基金面上项目（2020M680966）。

详细信息

作者简介:
郝冠迪，2002年出生，男，博士，研究方向：冶金热力学， E-mail：11758722892@qq.com

通讯作者:
邱吉雨，1992年出生，男，博士，讲师，研究方向：冶金热力学，E-mail：qiujiyu@smm.neu.edu.cn

中图分类号: TF703.6
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- 被引次数: 0
出版历程
- 收稿日期: 2023-01-17
- 网络出版日期: 2024-10-30
- 刊出日期: 2024-10-30

Phase coexistence relationship of CaO-Al₂O₃-V₂O₅slag system

Hao Guandi^{1, 2
,},
Qiu Jiyu^{1, 2
, ,},
Gong Henghui^{1, 2},
Liu Yuan^{1, 2},
Jiang Maofa^{1, 2}

1.
Key Laboratory for Ecological Metallurgy of Multimetallic Ores (Ministry of Education), Northeastern University, Shenyang 110819, Liaoning, China
2.
Northeastern University School of Metallurgy, Shenyang 110004, Liaoning, China

摘要

摘要: CaO-Al₂O₃-V₂O₅渣系是钢液脱氮渣系的基础氧化物渣系，其相平衡关系等热力学信息对于相关渣系的研究和开发至关重要。通过高温相平衡试验，结合扫描电镜和能谱分析，研究了CaO-Al₂O₃-V₂O₅渣系的相平衡关系。根据试验结果，确定了CaO-Al₂O₃-V₂O₅渣系1 600 ℃空气气氛条件下的相平衡关系，并绘制该体系全成分范围内CaO-Al₂O₃-V₂O₅渣系的等温截面图，共包含7个平衡相区，分别是：Liquid+Al₂O₃+CaAl₁₂O₁₉、Liquid+CaAl₁₂O₁₉+CaAl₄O₇、Liquid+CaO、Liquid+Al₂O₃、Liquid+CaAl₁₂O₁₉、Liquid+CaAl₄O₇和单一液相区。上述平衡相区的确定可实现CaO-Al₂O₃-V₂O₅渣系相图独立子体系的划分，还可为该渣系后续高温相图的绘制提供支持。
- 炼钢 /
- CaO-Al₂O₃-V₂O₅渣系 /
- 物相 /
- 高温相平衡试验
Abstract: CaO-Al₂O₃-V₂O₅ slag system is a basic metallurgical slag system for denitrification of liquid steel. The lack of thermodynamic information, such as the phase equilibrium relationship, limits the research and development of related slag systems. In this paper, the phase equilibrium relationship of CaO-Al₂O₃-V₂O₅ slag system was studied through high temperature phase equilibrium experiment, combined with scanning electron microscope and energy spectrum analysis. According to the experimental results, the phase equilibrium relationship of CaO-Al₂O₃-V₂O₅ slag line at 1 600 ℃ in air atmosphere was determined, and the isothermal cross section of CaO-Al₂O₃-V₂O₅ slag line within the whole component range of the system is drawn, including 7 equilibrium phase regions, i.e., Liquid+Al₂O₃+CaAl₁₂O₁₉, Liquid+CaAl₁₂O₁₉+CaAl₄O₇, Liquid+CaO, Liquid+Al₂O₃, Liquid+ CaAl₁₂O₁₉, Liquid+CaAl₄O₇ and single liquid phase region. The determination of equilibrium phase regions between the above phases can realize the division of independent sub-systems of the phase diagram of the CaO-Al₂O₃-Ce₂O₃ slag system, and can also provide support for the subsequent high-temperature phase diagram drawing of the slag system.
- steelmaking /
- CaO-Al₂O₃-V₂O₅ slag system /
- phase /
- high temperature phase equilibrium experiment

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图 1 渣样设计成分在相图中的位置

Figure 1. Position of design composition of slag sample in phase diagram

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图 2 典型渣样扫描电镜形貌

Figure 2. SEM images of typical samples

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图 3 空气气氛下CaO-Al₂O₃-V₂O₅渣系1 600 ℃等温截面

Figure 3. CaO-Al₂O₃-V₂O₅ slag system isothermal cross-section at 1 600 ℃ in air atmosphere

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表 1 试剂及纯度

Table 1. Reagents and their purity %

Al₂O₃	CaO	V₂O₅
99.99	99.99	99.99

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表 2 试验渣样设计成分

Table 2. Design compositions of experimental slag sample

渣样编号	w(Al₂O₃)/%	w(V₂O₅)/%	w(CaO)/%
1^#	55	45	0
2^#	30	64	6
3^#	70	16	14
4^#	30	58	12
5^#	50	30	20
6^#	50	25	25
7^#	60	7	33
8^#	30	30	40
9^#	20	10	70
10^#	10	20	70
11^#	0	35	65

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表 3 典型渣样平衡相的能谱分析结果

Table 3. EDS compositions of typical equilibrium phases

渣样号	平衡物相	组成成分			渣样号	平衡物相	组成成分
渣样号	平衡物相	CaO	Al₂O₃	V₂O₅	渣样号	平衡物相	CaO	Al₂O₃	V₂O₅
1^#	液相		7.72	92.28	7^#	液相	45.19	9.93	44.89
1^#	Al₂O₃		97.06	2.94	7^#	CaAl₄O₇	19.65	81.23
2^#	液相	23.88	8.91	67.21	8^#	液相	34.59	53.76	11.66
2^#	Al₂O₃		96.03	3.98	8^#	CaAl₄O₇	19.34	80.66
3^#	液相	33.94	8.36	57.71	9^#	液相	57.75	29.26	12.99
3^#	CaAl₁₂O₁₉	8.05	91.95		9^#	CaO	100.00
4^#	液相	23.32	10.42	66.27	10^#	液相	55.77	16.71	27.53
4^#	Al₂O₃		93.55	6.46	10^#	CaO	100.00
5^#	液相	32.01	11.51	56.49	11^#	液相	54.57		45.44
	CaAl₁₂O₁₉	7.31	92.70		11^#	CaO	100.00
	Al₂O₃		100.00
6^#	液相	42.42	7.24	50.34
	CaAl₄O₇	20.40	79.61
	CaAl₁₂O₁₉	9.37	90.64

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参考文献(12)

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