碳热还原制备金属钒技术研究

李兰杰; 常福增; 刘静; 张娜; 张苏新; 王海旭

doi:10.7513/j.issn.1004-7638.2024.02.001

碳热还原制备金属钒技术研究

doi: 10.7513/j.issn.1004-7638.2024.02.001

李兰杰^{1, 2},
常福增³,
刘静²,
张娜³,
张苏新^3, ,,
王海旭²

1.
河北河钢材料技术研究院有限公司, 河北石家庄050000
2.
河钢材料技术研究院, 河北石家庄050023
3.
承德钒钛新材料有限公司, 河北承德067102

基金项目: 河北省重点研发计划资助项目（编号：20311008D）；河北省自然科学基金资助项目(编号：B2022318001)。

详细信息

作者简介:
张苏新，1984年出生，男，山东单县人，研究生，高级工程师，通讯作者，主要从事钒钛新材料研究工作，E-mail：zhsx455@126.com

通讯作者:
张苏新，1984年出生，男，山东单县人，研究生，高级工程师，通讯作者，主要从事钒钛新材料研究工作，E-mail：zhsx455@126.com

中图分类号: TF841.3
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- 被引次数: 0
出版历程
- 收稿日期: 2024-02-08
- 网络出版日期: 2024-05-14
- 刊出日期: 2024-04-30

Research on preparation of metal vanadium by carbothermal reduction

1.
Hebei HBIS Material Technology Research Institute Co., Ltd., Shijiazhuang 050000, Hebei, China
2.
HBIS Material Technology Research Institute, Shijiazhuang 050023, Hebei, China
3.
Chengde Vanadium and Titanium New Materials Co., Ltd., Chengde 067102, Hebei, China

摘要

摘要: 以高纯V₂O₅粉末为原料，C粉末为还原剂，对碳热还原制备金属钒过程进行研究，重点讨论了配碳量、温度、真空度和还原时间对钒中间体和精炼提纯过程的影响。结果表明，V₂O₅为逐级还原，存在直接和间接还原。配碳比32%，还原温度控制在1350 ℃，保温时间为120 min时，得到的粗钒固溶体相以<VO，V₂C>为主，钒含量为84%左右。精炼提纯条件为温度1680 ℃，碳氧比1.02，真空度在0.1 Pa以下时，能得到延展性金属钒产品，纯度达到99.04%。
- 金属钒 /
- V₂O₅ /
- 碳热还原 /
- 粗钒 /
- 提纯
Abstract: High-purity V₂O₅ powder was used as raw material and carbon powder was used as reducing agent. The process of preparing metals by carbothermal reduction was studied, and the effects of the amount of carbon, temperature, vacuum degree and reduction time on the products were discussed. The results show that V₂O₅ is a stepwise reduction with direct and indirect reduction. With a carbon ratio of 32%, the reduction temperature at 1350 ℃, and the reduction time of 120 min, the obtained crude vanadium solid solution phase is mainly <VO, V₂C>, and the V content is about 84%. For refining conditions, when the temperature is controlled at 1680 ℃, the carbon-oxygen ratio is 1.02, and the vacuum degree is below 0.1 Pa, the ductile metal vanadium product can be obtained, and the purity of vanadium reaches 99.04%.
- metal vanadium /
- V₂O₅ /
- carbothermal reduction /
- crude vanadium /
- purification

HTML全文

图 1 钒的氧化和还原吉布斯自由能

Figure 1. Gibbs free energy of oxidation and reduction of vanadium

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图 2 温度对V-C-O样品中还原度的影响

Figure 2. Effect of temperature on reduction in V-C-O samples

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图 3 配碳比对样品各元素的影响

Figure 3. The influence of carbon ratio on the elements of the sample

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图 4 保温时间对粗钒还原率的影响

Figure 4. Effect of holding time on degree of reduction for crude vanadium

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图 5 不同配碳比下钒中间体的XRD谱

Figure 5. XRD patterns of the vanadium intermediates at different ratio of carbon to crude vanadium

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图 6 最高温度变化对样品中V含量的影响

Figure 6. Effect of maximum temperature change on V content in samples

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图 7 碳氧比对样品中V含量的影响

Figure 7. Effect of carbon/oxygen ratio on V content in samples

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图 8 真空度对样品中V含量的影响

Figure 8. Influence of vacuum degree on V content in sample

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图 9 粗钒提纯过程中温度及压力变化情况

Figure 9. Changes of temperature and pressure during the purification of crude vanadium

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图 10 精炼产品物相

Figure 10. Phase diagram of the refined product

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表 1 产品成分ICP分析

Table 1. ICP analysis of product composition %

V C O Al Ca Cr Fe Mg Mn Si

99.04 0.231 0.098 0.0787 0.161 0.005 0.1106 0.0141 0.009 0.0794

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