超声强化钒铬滤饼湿法浸出行为研究

龚倩; 王星星; 金贵炫; 黄金磊; 唐丹; 黄辉胜; 李兵; 石文兵; 林银河; 彭浩

doi:10.7513/j.issn.1004-7638.2023.06.005

超声强化钒铬滤饼湿法浸出行为研究

doi: 10.7513/j.issn.1004-7638.2023.06.005

长江师范学院化学化工学院, 重庆 408100

基金项目: 重庆市大学生创新创业训练计划项目（No.S202310647008）；重庆市自然科学基金面上项目（No.cstc2021jcyj-msxmX0129）；重庆市教委科学技术研究项目（No.KJQN202201406）。

详细信息

作者简介:
彭浩，1990年出生，男，博士，副教授，通讯作者，研究方向为资源化工，E-mail：cqupenghao@126.com

通讯作者:
彭浩，1990年出生，男，博士，副教授，通讯作者，研究方向为资源化工，E-mail：cqupenghao@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: 2023-08-28
- 网络出版日期: 2024-01-11
- 刊出日期: 2023-12-30

Leaching behavior of vanadium-chromium residue enhanced by ultrasonic

College of Chemistry and Chemical Engineering, Yangtze Normal University, Chongqing 408100, China

摘要

摘要: 钒铬滤饼中钒主要以低价态的形式存在，在碱性条件下难以直接溶出，通过焙烧-浸出的方式进行回收会带来较大能耗。引入超声对钒铬滤饼的碱性湿法浸出过程进行强化，实现低价钒向高价钒的氧化转化，可提高钒的浸出率。试验研究了氢氧化钠用量、反应温度、反应时间、反应液固比和搅拌转速等参数对钒浸出率的影响，结果表明，引入超声技术可以有效强化钒铬滤饼的湿法浸出过程，提高钒的浸出率。与直接碱性浸出相比，超声强化浸出过程可以使钒的浸出率提高34个百分点。在最佳反应条件下（氢氧化钠用量为m(NaOH)/m(钒铬滤饼)=0.5 g/g，反应温度为90 ℃，搅拌转速为500 r/min，反应时间为60 min，液固比为5 mL/g，超声频率为40 kHz），钒的浸出率可达96.9%。
- 提钒 /
- 钒铬滤饼 /
- 碱性浸出 /
- 超声强化 /
- 浸出率
Abstract: Vanadium is existed as low-valence in the vanadium-chromium residue, it is hard to leach out in alkaline medium, high-energy consumption is accompanied by roasting-leaching process. In this paper, ultrasonic was introduced to enhance the leaching process of vanadium-chromium residue to oxidize the low valence vanadium to high valence and make contribute to high leaching efficiency. The effects of NaOH dosage, reaction temperature, reaction time, liquid-to-solid ratio and stirring rate on the leaching efficiency of vanadium were investigated. The results show that the leaching process is significantly enhanced by ultrasonic leaching and the leaching efficiency of vanadium is improved. Compared with direct alkaline leaching, the leaching efficiency of vanadium is increased about 34 percentage. The leaching rate of vanadium is up to 96.9% under the optimal conditions including the dosage of NaOH at m(NaOH)/(residue)=0.5 g/g, reaction temperature of 90 ℃, stirring rate at 500 r/min, reaction time of 60 min, liquid-to-solid ratio at 5 mL/g and ultrasonic frequency at 40 kHz.
- vanadium extraction /
- vanadium-chromium residue /
- leaching in alkaline medium /
- ultrasonic reinforcement /
- leaching efficiency

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图 1 钒铬滤饼的XRD谱

Figure 1. XRD pattern of the vanadium and chromium residue

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图 2 NaOH用量对钒浸出率的影响

Figure 2. Effect of NaOH dosage on the leaching efficiency of vanadium

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图 3 反应温度对钒浸出率的影响

Figure 3. Effect of reaction temperature on the leaching efficiency of vanadium

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图 4 反应时间对钒浸出率的影响

Figure 4. Effect of reaction time on the leaching efficiency of vanadium

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图 5 液固比对钒浸出率的影响

Figure 5. Effect of liquid-to-solid ratio on the leaching efficiency of vanadium

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图 6 搅拌转速对钒浸出率的影响

Figure 6. Effect of stirring rate on the leaching efficiency of vanadium

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表 1 钒铬滤饼的主要化学组成

Table 1. XRF results of main composition in vanadium-chromium residue %

O Cr Si Na S V Ca Cl Fe K Mg

41.09 14.36 12.02 9.76 12.02 1.63 1.42 4.09 0.33 0.29 0.20

下载: 导出CSV

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