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不同钙含量钒渣的物相结构对钙化提钒的影响

余唐霞 温婧 孙红艳 李芳芳 姜涛

余唐霞, 温婧, 孙红艳, 李芳芳, 姜涛. 不同钙含量钒渣的物相结构对钙化提钒的影响[J]. 钢铁钒钛, 2021, 42(5): 18-23. doi: 10.7513/j.issn.1004-7638.2021.05.003
引用本文: 余唐霞, 温婧, 孙红艳, 李芳芳, 姜涛. 不同钙含量钒渣的物相结构对钙化提钒的影响[J]. 钢铁钒钛, 2021, 42(5): 18-23. doi: 10.7513/j.issn.1004-7638.2021.05.003
Yu Tangxia, Wen Jing, Sun Hongyan, Li Fangfang, Jiang Tao. Effects of phase structure of vanadium slags with different calcium content on calcified vanadium extraction[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(5): 18-23. doi: 10.7513/j.issn.1004-7638.2021.05.003
Citation: Yu Tangxia, Wen Jing, Sun Hongyan, Li Fangfang, Jiang Tao. Effects of phase structure of vanadium slags with different calcium content on calcified vanadium extraction[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(5): 18-23. doi: 10.7513/j.issn.1004-7638.2021.05.003

不同钙含量钒渣的物相结构对钙化提钒的影响

doi: 10.7513/j.issn.1004-7638.2021.05.003
基金项目: 国家自然科学基金面上项目(51874077);钒钛资源综合利用国家重点实验室开放课题(2019P4FZG00A)
详细信息
    作者简介:

    姜涛(1973—),男,辽宁本溪人,教授,博士生导师,长期从事冶金资源清洁高效利用技术工作,E-mail: jiangt@smm.neu.edu.cn。

  • 中图分类号: TF841.3

Effects of phase structure of vanadium slags with different calcium content on calcified vanadium extraction

  • 摘要: 以钙含量较低的西昌钒渣为基准,向其中添加不同含量CaO并重熔结晶得到不同钙含量的钒渣,利用XRD和SEM-EDS分析方法探究钒渣物相组成和微观结构随其钙含量变化的演变规律,查明不同钙含量钒渣钙化焙烧熟料的物相变化及对钒浸出率的影响。结果表明:随钒渣中CaO质量分数升高,尖晶石晶粒尺寸逐渐增大,橄榄石相Fe2SiO4逐渐转变为Ca2SiO4。当CaO含量升高至9.7%时,部分钛由钛铁尖晶石转移到钙钛矿。进一步升高CaO含量至13.7%时,尖晶石出现明显不规则化,且硅酸盐相逐渐复杂化。钙含量较低钒渣的钙化焙烧产物主要为焦钒酸钙,当钙含量超过3.7%后正钒酸钙开始生成。钙含量为2.7%的钒渣熟料钒浸出率最高为87.52%,进一步增加钙含量,钒浸出率略有下降,此时钒渣中原有的钙含量对钙盐焙烧添加剂用量和钒浸出率将产生影响。
  • 图  1  西昌钒渣XRD图谱

    Figure  1.  XRD pattern of XCVS

    图  2  不同钙含量钒渣XRD分析

    Figure  2.  XRD pattern of vanadium slags with different calcium content

    图  3  不同钙含量钒渣微观形貌

    Figure  3.  Micromorphology of vanadium slags with different calcium content

    图  4  不同钙含量钒渣主要元素分布(×2000)

    Figure  4.  Distribution of main elements in vanadium slags with different calcium content

    图  5  不同钙含量钒渣焙烧熟料XRD分析

    Figure  5.  XRD pattern of different roasted samples

    图  6  不同钙含量钒渣钙化焙烧—酸浸后钒的浸出率

    Figure  6.  Leaching rate of vanadium after calcification roasting and acid leaching of vanadium slags with different calcium content

    表  1  西昌钒渣化学成分

    Table  1.   Chemical composition of XCVS %

    FeOV2O3CaOCr2O3TiO2SiO2MnO总计
    38.1915.441.701.4214.613.169.9094.41
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-06-02
  • 刊出日期:  2021-10-30

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