碱性低钒粉料提钒技术试验研究

伍珍秀

doi:10.7513/j.issn.1004-7638.2021.05.005

碱性低钒粉料提钒技术试验研究

doi: 10.7513/j.issn.1004-7638.2021.05.005

伍珍秀

钒钛资源综合利用国家重点实验室, 攀钢集团研究院有限公司, 四川攀枝花 617000

详细信息

作者简介:
伍珍秀（1978—），女，高级工程师，主要从事钒渣提钒、钒铬渣钒铬提取及分离技术研究，E-mail：wuzhenxiu@ sohu.com

中图分类号: TF841.3,X75
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出版历程
- 收稿日期: 2021-06-21
- 刊出日期: 2021-10-30

Experimental study on vanadium extraction from alkaline vanadium-containing powder

Wu Zhenxiu

State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization, Pangang Group Research Institute Co., Ltd., Panzhihua 617000, Sichuan, China

摘要

摘要: 某碱性粉料主要成分为硫酸钠，含V₂O₅ 3.4%。该类碱性粉料无法直接酸溶、碱溶，如果直接焙烧再提钒，钒被氧化后，钒和大量硫酸钠均进入溶液中，形成一种低钒高钠的低钒溶液，后续从溶液中回收钒更困难。以该碱性低钒粉料为提钒原料，以水为溶剂溶解过滤后，可分离出87.94%的钒进入滤渣中，该滤渣中含V₂O₅ 34%。对富含钒的滤渣开展了直接酸溶、碱溶、钠化焙烧提钒探索试验，选择钠化焙烧-水浸工艺对滤渣开展提钒技术研究，试验结果表明：滤渣干重100 g外配30 g碳酸钠，780 ℃煅烧90 min，焙烧熟料水浸，钒提取率可达97.96%，钒总收率可达86.15%。该技术研究为此类碱性低钒粉料提供一条提钒新思路。
- 提钒 /
- 碱性低钒粉料 /
- 水溶 /
- 钠化焙烧-水浸 /
- 钒收率
Abstract: In this study, the alkaline powder is mainly sodium sulfate, containing 3.4% V₂O₅, which can not be dissolved in acid or alkali. If vanadium is directly roasted and then extracted, vanadium and a large amount of sodium sulfate will enter the solution and form a low vanadium solution with low vanadium and high sodium, and the subsequent recovery of vanadium from the solution is more difficult. With the alkaline low vanadium powder used as the raw material for extracting vanadium, 87.94% vanadium can be separated into the filter residue after water dissolution and filtration, and the filter residue contains V₂O₅ 34%. Exploratory tests on vanadium extraction from vanadium-rich filter residue by direct acid dissolution, alkali dissolution and sodium roasting were carried out. The sodium roasting-water leaching process was selected for vanadium extraction technology research on the filter residue. The experimental results showed that the extraction rate of vanadium could reach 97.96% and the total yield of vanadium could reach 86.15%, according to the dry weight of 100 g with 30 g sodium carbonate, calcination at 780 ℃ for 90 min and water leaching of the roasted residue. The study of this technology provides a new approach for extracting vanadium from this kind of alkaline low vanadium powder.
- vanadium extraction /
- alkaline vanadium-containing powder /
- water solution /
- roasting-water leaching process /
- vanadium yield

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图 1 碳酸钠含量对滤渣钒提取率的影响

Figure 1. The effect of sodium carbonate on the extraction rate of vanadium from the filter residue

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图 2 焙烧温度对滤渣中钒提取率的影响

Figure 2. The effect of calcination temperature on the extraction rate of vanadium from the filter residue

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图 3 高温焙烧时间对滤渣中钒提取率的影响

Figure 3. The effect of calcination time on the extraction rate of vanadium from the filter residue

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表 1 含钒粉料的主要成分

Table 1. Main compositions of the vanadium powder %

V₂O₅	Na₂SO₄	SiO₂	Cl⁻	Fe₂O₃	NiO	CaO	K₂O	CaO	其它
3.4	90	0.8	0.9	0.9	1.2	0.3	0.5	0.3	1.7
其它为没有给出的元素，可能为易挥发的H、O、C等元素。

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表 2 滤渣的主要成分

Table 2. Main compositions of the filter residue %

V₂O₅	Na₂SO₄	SiO₂	Al₂O₃	Fe₂O₃	NiO	CaO	K₂O	MgO	TiO₂	其它
34	2.37	11	4.1	16	18	2.7	0.7	0.8	1.0	9.33

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表 3 滤渣提钒探索试验结果

Table 3. The experimental results for extracting vanadium from the filter residue

试验工艺	现象	分析
直接酸浸	钒无浸出	无法酸溶出
直接碱浸	基本无浸出	无法碱溶出
钠化焙烧-水浸	大量钒浸出	可以钠化焙烧浸出

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表 4 验证试验钒收率结果

Table 4. results of verification test on vanadium yield %

试验样	钒分离率	钒提取率	钒总收率
1	87.94	97.92	86.11
2	87.94	98.01	86.19
3	87.94	97.96	86.15
均值	87.94	97.96	86.15

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