熔融钒渣还原提铁过程中的黏度特性研究

王宁; 陈敏; 张灵犀

doi:10.7513/j.issn.1004-7638.2022.02.006

熔融钒渣还原提铁过程中的黏度特性研究

doi: 10.7513/j.issn.1004-7638.2022.02.006

王宁^{1, 2,},
陈敏^2, ,,
张灵犀²

1.
钒钛资源综合利用国家重点实验室, 四川攀枝花 617000
2.
东北大学冶金学院, 辽宁沈阳 110819

基金项目: 国家自然科学基金（51574065、51774073、51574066、51774072）和十三五国家重点研发计划（2017YFB0304201，2017YFB0304203）资助。

详细信息

作者简介:
王宁（1995—），男，河北石家庄人，硕士研究生，主要从事钒系合金冶炼技术研究，E-mail：1134534422@qq.com

通讯作者:
陈敏（1969—），男，教授，主要研究方向为低碳综合利用，E-mail：chenm@smm.neu.edu.cn

中图分类号: X757,TF841.3
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- 文章访问数: 254
- HTML全文浏览量: 60
- PDF下载量: 33
- 被引次数: 0
出版历程
- 收稿日期: 2021-07-13
- 网络出版日期: 2022-05-11
- 刊出日期: 2022-04-28

Study on viscosity characteristics of molten vanadium slag during iron-extracting reduction process

Wang Ning^{1, 2
,},
Chen Min^{2
, ,},
Zhang Lingxi²

1.
State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization,Panzhihua 617000，Sichuan，China
2.
School of Metallurgy, Northeastern University ,Shenyang 110819，Liaoning，China

摘要

摘要: 研究了在切削废料还原熔融钒渣提铁的工艺进程中熔渣体系黏度的变化规律，并通过对钒渣体系熔体结构的研究，从微观结构角度揭示了熔体中结构单元对宏观黏度的作用机理。结果表明，随还原反应进行，渣中FeO含量不断降低，SiO₂含量增加，渣中自由氧离子减少，无法破坏硅酸盐的链、环状结构，导致渣中孤立体、二聚体等简单硅酸盐结构单元减少，链、层状等复杂硅酸盐结构单元增加，熔体聚合度增强，渣系黏度逐渐增加。
- 熔融钒渣 /
- 光伏切削废料 /
- 还原 /
- 黏度特性 /
- 熔体结构
Abstract: In this paper, the viscosity variation of the vanadium slag system in the iron-extracting reduction process from molten vanadium slag in cutting waste was studied, and the effect mechanism of structural units in the melt on macro-viscosity was revealed from the perspective of microstructure by studying the melt structure of vanadium slag system. Results showed that the content of FeO in the slag decreased, and the content of SiO₂ increased during the reduction reaction. Meanwhile, the free oxygen ions in the slag decreased, and the chain and ring silicate structure could not be destroyed, further causing the decrease of simple silicate structural units such as Q⁰ and Q¹, and the increase of complex silicate structural units such as Q² and Q³. Finally, the melt polymerization degree increased, and the slag viscosity increased gradually.
- molten vanadium slag /
- photovoltaic cutting waste /
- reduction /
- viscosity characteristics /
- melt structure

HTML全文

图 1 熔融钒渣还原进程渣系的黏温曲线

Figure 1. Viscosity-temperature curve of molten vanadium slag system during reduction process

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图 2 1 823 K下急冷试样的XRD谱

Figure 2. XRD patterns of quenched samples at 1 823 K

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图 3 1 823 K下急冷试样的SEM形貌

Figure 3. SEM images of quenched samples at 1 823 K

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图 4 1 823 K下急冷试样拉曼光谱拟合

Figure 4. Curve-fitting of Raman spectral of quenched samples at 1 823 K

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表 1 试验钒渣主要化学成分

Table 1. Main chemical compositions of vanadium residue %

FeO	SiO₂	V₂O₃	Cr₂O₃	MnO	TiO₂	MgO
40.51	19.04	14.01	4.84	10.97	9.03	1.60

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表 2 试验用光伏切削废料的化学成分

Table 2. Chemical composition of photovoltaic cutting waste for testing %

Si	SiC	SiO₂	FeO
56.17	23.56	8.90	11.37

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表 3 试验配渣样成分

Table 3. Chemical composition of slagging sample for testing %

FeO还原率	FeO	SiO₂	V₂O₃	Cr₂O₃	TiO₂	MnO	CaO
0	37	17	13	5	9	11	8
20	30	22	14	5	9	11	9
40	24	27	14	5	9	11	10
60	18	32	15	5	9	11	10
80	11	37	16	5	9	11	11

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表 4 硅酸盐熔体中显微结构单元分类

Table 4. Classification of microstructural units in silicate melts

骨架型式	组成单元	NBO/T	Qⁱ
三维网络	SiO₂	0	Q⁴
层状、板状	Si₂O₅²⁻	1	Q³
链、环型	Si₂O₆⁴⁻	2	Q²
二聚体	Si₂O₇⁶⁻	3	Q¹
孤立体	SiO₄⁴⁻	4	Q⁰

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参考文献(10)

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