烟气制酸废催化剂直接湿法浸出钒、钾和锌的试验研究

朱军; 刘丹阳; 杨淼; 陈毅鹏; 王斌; 赵律; 康敏

doi:10.7513/j.issn.1004-7638.2021.02.003

烟气制酸废催化剂直接湿法浸出钒、钾和锌的试验研究

doi: 10.7513/j.issn.1004-7638.2021.02.003

朱军^{1, 2,},
刘丹阳¹,
杨淼¹,
陈毅鹏¹,
王斌¹,
赵律²,
康敏³

1.
西安建筑科技大学，陕西西安 710055
2.
陕西汉中锌业，陕西西安 710055
3.
西北有色地质研究院，陕西西安 710055

基金项目: 国家自然科学基金项目（H₂SO₄+HnAm新体系处理氰化尾渣降氰除铁技术及应用基础研究，51974221）

详细信息

作者简介:
朱军(1963—)，男，山东烟台人，通讯作者，教授，博士，主要从事冶金资源综合利用，E-mail：13759906260@126.com。

中图分类号: TF841.3, TQ426
计量
- 文章访问数: 261
- HTML全文浏览量: 16
- PDF下载量: 49
- 被引次数: 0
出版历程
- 收稿日期: 2020-12-17
- 刊出日期: 2021-04-10

Direct leaching of spent catalyst from acid production from flue gas

1.
Xi’an University of Architecture and Technology, Xi’an 710055, Shanxi, China
2.
Shanxi Hanzhong Zinc Industry, Xi’an 710055, Shanxi, China
3.
Northwest Institute of Nonferrous Geology, Xi’an 710055, Shanxi, China

摘要

摘要: 重金属冶炼烟气制酸的废催化剂杂质组成相对复杂，为获得此类废催化剂综合回收钒、钾、锌工艺的优化条件，对直接湿法浸出工艺钒、钾、锌浸出率的影响因素进行了试验研究。通过单因素试验，系统研究了浸出剂质量分数、液固比、反应温度、反应时间对钒、钾、锌浸出率的影响，其次对废催化剂和浸出渣的化学成分及物相进行了分析对比。结果表明，浸出的最佳工艺条件为：硫酸质量分数8%、液固比2∶1、浸出温度70 ℃、浸出时间1.5 h，钒、钾、锌的浸出率分别达93.58%、85.43%、99.31%，优于传统焙烧法。
- 废催化剂 /
- 冶炼烟气 /
- 制酸 /
- 酸浸 /
- 钒 /
- 钾 /
- 锌 /
- 浸出率
Abstract: The waste catalyst from acid production from heavy metal smelting flue gas has relatively complex impurity compositions. In order to obtain the optimum conditions for comprehensive recovery of vanadium, potassium and zinc from the waste catalyst, a direct leaching process was proposed and the factors affecting the leaching rate of vanadium, potassium and zinc, e.g. the mass fraction of leaching agent, liquid-solid ratio, reaction temperature and time, were studied. The chemical and phase compositions of the waste catalyst and leaching residue were analyzed and compared. The optimum leaching conditions were determined at the sulfuric acid mass fraction of 8%, liquid-solid ratio of 2∶1, leaching temperature of 70 ℃ and leaching time of 1.5 h, with the leaching rates of vanadium, potassium and zinc at 93.58%, 85.43% and 99.31%, respectively. The proposed process is better than the traditional roasting method.
- waste catalyst /
- smelting flue gas /
- acid production /
- acid leaching /
- vanadium /
- potassium /
- zinc /
- recovery rate

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图 1 废催化剂的XRD分析

Figure 1. XRD patterns of the spent catalyst

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图 2 废催化剂的SEM形貌

Figure 2. SEM of the spent catalyst

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图 3 硫酸浓度对钒、钾、锌浸出率的影响

Figure 3. Effect of sulfuric acid concentration on leaching rate of vanadium, potassium and zinc

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图 4 液固比对钒、钾、锌浸出率的影响

Figure 4. Effect of liquid-solid ratio on leaching rate of vanadium, potassium and zinc

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图 5 温度对钒、钾、锌浸出率的影响

Figure 5. Effect of temperature on leaching rate of vanadium, potassium and zinc

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图 6 时间对钒、钾、锌浸出率的影响

Figure 6. Effect of time on leaching rate of vanadium, potassium and zinc

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图 7 废催化剂酸浸渣XRD分析

Figure 7. XRD patterns of acid leaching residue of spent catalyst

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图 8 酸浸渣的SEM形貌

Figure 8. SEM of acid leaching residue

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表 1 废催化剂的主要化学成分分析

Table 1. Main chemical compositions of the spent catalyst %

SiO₂ SO₃ K₂O V₂O₅ Fe₂O₃

60.23 15.39 7.62 5.76 3.62
Al₂O₃ P₂O₅ Na₂O ZnO 其余
2.00 1.94 0.920 0.784 1.736

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表 2 酸浸渣的主要成分

Table 2. Main compositions of acid leaching residue %

SiO₂ K₂O V₂O₅ ZnO 其余

89.41 1.64 0.658 0.02 8.272

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