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钙法钒渣熟料流态化浸出工艺研究

汪劲鹏 彭毅

汪劲鹏, 彭毅. 钙法钒渣熟料流态化浸出工艺研究[J]. 钢铁钒钛, 2021, 42(4): 1-5. doi: 10.7513/j.issn.1004-7638.2021.04.001
引用本文: 汪劲鹏, 彭毅. 钙法钒渣熟料流态化浸出工艺研究[J]. 钢铁钒钛, 2021, 42(4): 1-5. doi: 10.7513/j.issn.1004-7638.2021.04.001
Wang Jingpeng, Peng Yi. Study on fluidized leaching of calcified vanadium slag clinker[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(4): 1-5. doi: 10.7513/j.issn.1004-7638.2021.04.001
Citation: Wang Jingpeng, Peng Yi. Study on fluidized leaching of calcified vanadium slag clinker[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(4): 1-5. doi: 10.7513/j.issn.1004-7638.2021.04.001

钙法钒渣熟料流态化浸出工艺研究

doi: 10.7513/j.issn.1004-7638.2021.04.001
详细信息
    作者简介:

    汪劲鹏(1991−),男,湖北黄冈人,高级工程师,主要从事钒资源高效提取及利用研究,E-mail:1257549530@qq.com

  • 中图分类号: TF841.3

Study on fluidized leaching of calcified vanadium slag clinker

  • 摘要: 利用散式直管流化床进行了钙法钒渣熟料流态化浸出工艺研究,测定了熟料颗粒的粒度分布并分成7个粒级开展试验,首先计算出不同粒级下的临界速率及带出速率,考察了钒渣粒度对表观流化速率、停留时间分布以及钒浸出率的影响。结果表明,不同粒级的临界流化速率和停留时间差异较大,且存在显著的短路或者沟流现象,需分级处理,其中−39 μm颗粒的浸出效果最好,尾渣残钒为0.54%,钒浸出率可达94%。
  • 图  1  直管流化床结构示意

    Figure  1.  Structure of straight tube fluidized bed reactor

    图  2  不同粒级颗粒的流化速率

    Figure  2.  Fluidization velocity of different size fractions

    图  3  不同粒度颗粒的尾渣残钒和浸出率

    Figure  3.  Residual vanadium in tailings and vanadium leaching rate of clinkers with different particle sizes

    图  4  不同粒度颗粒的浸出液pH和钒浓度

    Figure  4.  pH and vanadium concentration of leaching solutions from clinkers with different particle sizes

    图  5  不同粒级颗粒的停留时间分布规律

    Figure  5.  Residence time distribution of particles of different size fractions

    表  1  钙化熟料主要化学成分

    Table  1.   Main chemical compositions of calcified vanadium slag clinker %

    V2O5TFeSiO2MnOTiO2Al2O3MgOCaOCr2O3P2O5
    16.1025.5013.779.1711.521.521.868.161.910.13
    下载: 导出CSV

    表  2  钙化熟料粒度分布及密度

    Table  2.   Particle size distribution and density of calcified vanadium slag clinker

    粒度/μm含量/%密度/(g·cm−3)
    +1805.852.95
    −180~+1257.583.17
    −125~+957.623.27
    −95~+7413.473.24
    −74~+637.033.33
    −63~+3931.753.44
    −3926.703.58
    下载: 导出CSV

    表  3  各粒级颗粒的临界流化速度和带出速度

    Table  3.   Critical fluidization velocity and entrainment velocity of different size fractions

    粒级/μm平均粒径/μm临界流化速度
    Umf/(cm·s−1)
    带出速度
    Ut/(cm·s−1)
    +1801800.472.31
    −180~+1251500.372.02
    −125~951110.211.70
    −95~+74850.120.99
    −74~+63688.30×10−20.66
    −63~+39494.58×10−20.36
    −39393.00×10−20.24
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-06-21
  • 刊出日期:  2021-08-10

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