钒渣常压直接酸溶浸出实验

熊雨婷; 王玲; 刘建欣; 贾蓝波; 刘淑贤; 聂轶苗

doi:10.3969/j.issn.1000-6532.2023.03.006

钒渣常压直接酸溶浸出实验

华北理工大学矿业工程学院河北省矿业开发与安全技术重点实验室，河北　唐山　063210

基金项目: 国家自然科学基金（52004091）；河北省自然科学基金（E2019209494）；唐山市科技计划项目（19130216g，19130218g）

详细信息

作者简介: 熊雨婷（1994-），女，硕士研究生，主要研究方向为矿产资源综合利用

通讯作者: 王玲（1977-），女，副教授，主要从事矿产资源综合利用及环境矿物学相关研究。

中图分类号: TD951

收稿日期: 2021-08-18

刊出日期: 2023-06-25

Investigation of Acid Leaching of Vanadium Slag under the Atmospheric Pressure

Hebei Province Key Laboratory of Mining Exploitation and Security Technology, College of Mining Engineering, North China University of Science and Technology, Tangshan, Hebei, China

More Information

Corresponding author: Wang Ling, wanglingts_@163.com

Received Date: 18 August 2021

Publish Date: 25 June 2023

摘要

摘要:
这是一篇冶金工程领域的论文。以河北承德某钢厂钒渣为研究对象，针对当前钒渣“钠化焙烧-水浸提钒”生产工艺易产生有毒有害气体且钒回收率低、多种有价金属未能综合回收利用的现状，本文在Fe-V-H₂O系热力学研究基础上，对钒渣常压下直接硫酸溶解浸出过程中磨矿细度、反应温度、酸浓度、液固比、浸出反应时间及搅拌速度等影响因素进行了实验研究。结果表明，浸出反应温度、硫酸浓度及液固比对钒浸出具有显著影响，在粒度D₉₅约16 μm，反应温度90 ℃、液固比8∶1、H₂SO₄浓度4 mol/L、浸出反应时间8 h、搅拌速度400 r/min的条件下，钒浸出率为86.33%；酸溶过程中产生的无定形SiO₂可能覆盖在未溶解完全的矿物颗粒表面而阻碍矿物的进一步酸溶反应。
- 钒渣 /
- 不焙烧 /
- 常压酸浸 /
- 钒浸出率 /
- 冶金工程
Abstract:
This is a paper in the field of metallurgical engineering. The vanadium slag of a steel plant in Chengde, Hebei Province was used as the object of study. In view of the production of toxic and harmful gases of the current process of "sodium roasting-vanadium extractionby water leaching" of vanadium slag, low recovery of vanadium and the failure of comprehensive utilization of valuable metals. Based on the thermodynamic study of Fe-V-H₂O system, the effects of grinding fineness, reaction temperature, sulfuric acid concentration, liquid-solid ratio, leaching reaction time and stirring speed on vanadium slag leaching were investigated under atmospheric condition. The results show that leaching temperature, sulfuric acid concentration and liquid-solid ratio have significant effects on vanadium slag leaching. Under the conditions of particle size of D₉₅ for 16 μm, reaction temperature for 90 ℃, liquid-solid ratio for 8∶1, concentration of H₂SO₄ for 4 mol/L, leaching time for 8 h and stirring speed for 400 r·min^-1, vanadium leaching rate is 86.33%. The amorphous SiO₂ produced in the process of acid dissolution may cover the surface of incompletely dissolved mineral particles and hinder the further acid dissolution of them.
- Vanadium slag /
- Non-roasting /
- Acid leaching under atmospheric pressure /
- Vanadium leaching rate /
- Metallurgical engineering

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图 1 钒渣XRD

Figure 1.

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图 2 Fe-V-H₂O 系25 ℃和100 ℃时 E-pH

Figure 2.

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图 3 酸浸条件对钒渣浸出的影响

Figure 3.

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图 4 钒渣浸出前后X射线粉末衍射

Figure 4.

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图 5 钒渣浸出前后微观形貌

Figure 5.

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表 1 钒渣主要化学组成/%

Table 1. Main chemical compositions of vanadium slag

Fe₂O₃ SiO₂ Al₂O₃ CaO MgO Cr₂O₃ MnO₂ TiO₂ V₂O₅ 其他

30.60 20.04 2.73 1.44 1.18 3.47 4.40 9.37 11.33 0.44

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