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从失效SCR脱硝催化剂中提取钛资源实验

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彭杨. 从失效SCR脱硝催化剂中提取钛资源实验[J]. 矿产综合利用, 2025, 46(2): 89-92. doi: 10.3969/j.issn.1000-6532.2025.02.013
引用本文: 彭杨. 从失效SCR脱硝催化剂中提取钛资源实验[J]. 矿产综合利用, 2025, 46(2): 89-92. doi: 10.3969/j.issn.1000-6532.2025.02.013
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PENG Yang. Recovery of Titanium Resources from Spent SCR Denitration Catalysts[J]. Multipurpose Utilization of Mineral Resources, 2025, 46(2): 89-92. doi: 10.3969/j.issn.1000-6532.2025.02.013
Citation: PENG Yang. Recovery of Titanium Resources from Spent SCR Denitration Catalysts[J]. Multipurpose Utilization of Mineral Resources, 2025, 46(2): 89-92. doi: 10.3969/j.issn.1000-6532.2025.02.013
shu

从失效SCR脱硝催化剂中提取钛资源实验

  • 四川顺应动力电池材料有限公司，四川　眉山　620031

详细信息
    作者简介: 彭杨（1996-），男，硕士研究生，主要从事选矿工艺与矿物冶金研究

  • 中图分类号: TD951

Recovery of Titanium Resources from Spent SCR Denitration Catalysts

  • Sichuan Shunying Power Battery Materials Co., Ltd., Meishan 620031, Sichuan, China

    摘要

  • 火力发电厂烟尘净化系统的废弃催化剂中含有钛、钨、钼、钒等有价金属，从中回收有价资源是目前一个热门的研究课题。本文所用的SCR脱硝催化剂中主要有价资源为TiO2，化学滴定结果表明其含量为70.18%，主要杂质及其含量分别为：Na2O 10.81%、SiO2 5.06%、Al2O3 0.95%、Fe2O3 0.47%；试样的粒级分析表明各个粒级中均有TiO2分布，且没有明显的聚集现象。本文采用钠盐焙烧、硫酸浸出、浸出渣煅烧的联合工艺流程，可除去大部分杂质，最终获得TiO2含量为89.75%的煅烧产品。

    The waste catalysts of the flue gas purification system of thermal power plants contain valuable metals such as titanium, tungsten, molybdenum, vanadium, etc.. The recovery of valuable resources from them is a hot research topic at present. The main valuable resource in the SCR denitration catalyst used in this paper is TiO2. The chemical titration results show that the content is 70.18%, the main impurities and their contents are: Na2O content is 10.81%, SiO2 content is 5.06%, Al2O3 content is 0.95% , and Fe2O3 content is 0.47%. The particle size analysis of the sample shows that there is TiO2 distribution in each particle size, and there is no obvious aggregation phenomenon. In this paper, the combined process of sodium salt roasting, sulfuric acid leaching, and leaching residue calcination can remove most of the impurities and finally obtain a calcined product with a TiO2 content of 89.75%.

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  • 表 1  试样主要化学成分半定量分析结果/%

    Table 1.  Semi-quantitative analysis results of the main chemical components of the samples

    TiO2Na2OSiO2Al2O3WO3Fe2O3K2OMoO3V2O5
    78.9310.815.060.950.610.470.090.030.02
    下载: 导出CSV

    表 2  试样筛分分析结果

    Table 2.  Sample sieving analysis results

    粒级/mm产率/%累计产率/%TiO2/%TiO2分布率/%
    +0.1507.447.4470.957.47
    -0.150+0.1009.5216.9670.199.45
    -0.100+0.0747.3424.3069.417.21
    -0.074+0.04513.9738.2869.2213.68
    -0.045+0.0387.9546.2368.637.72
    -0.03853.77100.0071.6354.48
    合计100.00/70.78100.00
    下载: 导出CSV

    表 3  碳酸钠用量实验结果

    Table 3.  Test results of sodium carbonate dosage

    碳酸钠与脱硝渣的质量比 1∶2 4∶5 1∶1 6∶5
    TiO2品位/% 84.07 86.22 89.71 86.58
    下载: 导出CSV

    表 4  焙烧条件实验结果

    Table 4.  Test results of roasting conditions

    焙烧温度/℃焙烧时间/hTiO2品位/%
    750285.78
    750386.93
    750487.15
    800287.86
    800389.61
    800489.84
    850188.78
    850287.28
    850386.78
    下载: 导出CSV

    表 5  煅烧渣主要化学成分分析结果/%

    Table 5.  Analysis results of main chemical components of calcined slags

    TiO2SiO2Fe2O3Na2OCaOWO3
    88.70.61.02.43.80.2
    下载: 导出CSV
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收稿日期:  2022-08-17
刊出日期:  2025-04-25

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