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钒钛烧结矿软熔滴落过程中的物相组成及化学成分变化规律研究

谢洪恩 胡鹏 郑魁 朱凤湘

谢洪恩, 胡鹏, 郑魁, 朱凤湘. 钒钛烧结矿软熔滴落过程中的物相组成及化学成分变化规律研究[J]. 钢铁钒钛, 2022, 43(2): 107-117. doi: 10.7513/j.issn.1004-7638.2022.02.017
引用本文: 谢洪恩, 胡鹏, 郑魁, 朱凤湘. 钒钛烧结矿软熔滴落过程中的物相组成及化学成分变化规律研究[J]. 钢铁钒钛, 2022, 43(2): 107-117. doi: 10.7513/j.issn.1004-7638.2022.02.017
Xie Hong’en, Hu Peng, Zheng Kui, Zhu Fengxiang. Study on phase and chemical composition of V-Ti sinter during softening, melting and dripping process[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(2): 107-117. doi: 10.7513/j.issn.1004-7638.2022.02.017
Citation: Xie Hong’en, Hu Peng, Zheng Kui, Zhu Fengxiang. Study on phase and chemical composition of V-Ti sinter during softening, melting and dripping process[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(2): 107-117. doi: 10.7513/j.issn.1004-7638.2022.02.017

钒钛烧结矿软熔滴落过程中的物相组成及化学成分变化规律研究

doi: 10.7513/j.issn.1004-7638.2022.02.017
详细信息
    作者简介:

    谢洪恩(1977—),男,四川内江人,研究生,研究方向:钒钛矿高炉冶炼,E-mail: pzhxiehongen@163.com

  • 中图分类号: TF53,TF823

Study on phase and chemical composition of V-Ti sinter during softening, melting and dripping process

  • 摘要: 钒钛磁铁精矿的入炉方式是攀钢优化高炉炉料结构的重要内容,对V和Ti在软熔滴落过程中的迁移以及Ti(C,N)的生成有重要影响。目前钒钛烧结矿是攀钢高炉的主要炉料,约一半的钒钛磁铁精矿通过烧结矿进入高炉。通过对钒钛烧结矿在软熔滴落过程中的物相组成和化学成分的变化规律进行研究发现,在烧结矿的软熔滴落过程中,Ti、V、Si、Mg、Al等元素逐渐从钛赤铁矿、钛磁铁矿、铁酸钙等物相迁移到渣相中,同时炉渣吸收焦炭的硫分和灰分。金属铁中Ti、Si、S和C的质量分数已达到甚至超过正常生产时的水平,V的质量分数虽远低于正常生产时的水平,但在金属铁中的收得率远高于Ti、Si、S。烧结矿炉渣冷却后形成的主要物相是黄长石,其次是钙钛矿和辉石。Ti和V主要赋存于钙钛矿中,其次是黄长石和辉石中。在软熔过程中,生成的碳氮化钛很少;在重熔滴落过程中,渣中碳氮化钛显著增加。
  • 图  1  铁矿石软熔性能试验设备示意

    Figure  1.  Schematic diagram of experimental apparatus for iron ore softening-melting property

    图  2  钒钛烧结矿软熔性能测定后的试样

    Figure  2.  Different samples of vanadium-titanium sinter after softening-melting property testing

    图  3  烧结矿软熔液泛渣的SEM照片

    Figure  3.  SEM photo of flooding slag on graphite pusher during softening

    图  4  烧结矿软熔未滴渣的SEM照片及EDS分析

    Figure  4.  SEM image and EDS analysis of the sinter softening-melting undripped slag

    图  5  烧结矿软熔滴落渣的SEM照片及EDS分析

    Figure  5.  SEM image and EDS analysis of the sinter softening-melting dripped slag

    图  6  烧结矿重熔滴落渣的SEM照片及EDS分析

    Figure  6.  SEM image and EDS analysis of the sinter remelting dripped slag

    图  7  金属铁中V、Ti、Si、S的收得率

    Figure  7.  Yield of V, Ti, Si and S in metallic iron

    表  1  钒钛烧结矿的主要化学成分

    Table  1.   Chemical composition of vanadium-titanium sinter

    化学成分/%RO
    TFeFeOCaOSiO2MgOAl2O3TiO2V2O5S
    50.777.9910.975.582.723.005.590.3880.0251.97
    下载: 导出CSV

    表  2  焦炭的化学成分

    Table  2.   Chemical compositions of coke %

    FcadMtStVdafAd
    K2ONa2OCaOSiO2MgOAl2O3Fe2O3合计
    85.880.230.631.090.080.100.497.240.133.731.0312.80
    下载: 导出CSV

    表  3  烧结矿重熔后的渣铁质量

    Table  3.   Weight of slag and metallic iron after sinter remelting g

    未滴落炉渣未滴落金属铁滴落炉渣滴落金属铁合计
    41.070.013.125.8149.9
    下载: 导出CSV

    表  4  不同炉渣的化学成分

    Table  4.   Chemical compositions of different slags

    样品名称化学成分/%
    TFeFeOCaOSiO2MgOAl2O3TiO2V2O5STiCTiN
    软熔液泛渣6.002.2538.4722.425.1410.1414.640.6950.18<0.1<0.1
    软熔未滴渣4.253.0929.7215.838.568.1415.310.7010.14<0.1<0.1
    软熔滴落渣14.003.9237.3421.237.7410.4116.560.7200.16<0.1<0.1
    重熔未滴渣11.753.4130.5221.237.918.7913.450.2320.531.130.34
    重熔滴落渣19.882.0829.9518.687.778.2512.770.1450.41<0.10.247
    下载: 导出CSV

    表  5  主要造渣组份的相对质量分数

    Table  5.   Relative content of main slagging components in different slags

    样品名称相对质量分数/%R2
    CaOSiO2MgOAl2O3TiO2V2O5S
    软熔液泛渣41.9624.455.6111.0615.970.760.201.72
    软熔未滴渣37.9120.1910.9210.3819.530.890.181.88
    软熔滴落渣39.6622.558.2211.0617.590.760.171.76
    重熔未滴渣36.9225.689.5710.6316.270.280.641.44
    重熔滴落渣38.4123.969.9610.5816.380.190.531.60
    烧结矿渣相38.8019.749.6210.6119.771.370.091.97
    下载: 导出CSV

    表  6  不同金属铁的化学成分

    Table  6.   Chemical compositions of different metallic irons

    样品名称化学成分/%
    CSVTiSi
    软熔未滴铁4.830.0550.1020.1140.135
    软熔滴落铁3.400.0800.0290.2070.193
    重熔未滴铁4.530.1250.0760.2591.100
    重熔滴落铁4.760.0880.0800.0700.431
    生产铁样4.420.0870.333
    下载: 导出CSV

    表  7  烧结矿软熔液泛渣的物相组成和元素分布

    Table  7.   Phase and element distribution of flooding slag on graphite pusher during softening

    矿物名称w/%化学成分/%
    FeOTiVSiCaMgAl
    黄长石 68.54 3.71 74.00 23.39 39.00 90.19 72.93 84.19 88.65
    钙钛矿 21.84 2.21 21.40 73.70 56.03 4.34 23.16 5.86 7.15
    金属铁 4.71 81.52 0.09 0.28 1.55 0.24 0.17 0.59 0.32
    辉石 1.21 0.04 1.33 1.01 0.10 1.30 0.91 3.45 1.72
    透辉石 0.80 0.23 0.91 0.20 0.54 1.12 0.63 2.58 0.38
    铁酸钙 1.15 8.70 0.62 0.94 1.33 0.67 0.59 1.54 0.64
    玻璃质 0.04 0.00 0.05 0.01 0.05 0.07 0.01 0.11 0.06
    其它 1.71 3.61 1.60 0.47 1.42 2.07 1.58 1.69 1.08
    下载: 导出CSV

    表  8  烧结矿软熔未滴落渣的物相组成和元素分布

    Table  8.   Phase and element distribution of residual slag in graphite crucible during softening

    矿物名称w/%化学成分/%
    FeONTiVSiCaMgAl
    黄长石 35.73 0.26 47.26 0 7.40 13.83 69.45 51.82 35.88 56.82
    钙钛矿 22.76 0.49 27.03 0 84.13 58.82 3.91 31.48 3.68 8.61
    金属铁 22.15 93.21 0.50 0 1.10 7.28 1.24 0.82 1.89 1.59
    辉石 7.03 0.07 9.91 0 2.89 4.78 9.66 7.22 16.04 16.93
    透辉石 6.03 0.19 8.36 0 1.45 4.89 12.01 6.46 17.50 2.60
    镁铝尖晶石 1.90 0.05 2.90 0 0.99 4.47 0.55 0.38 6.21 11.28
    MgO 1.26 0.03 1.76 0 0.14 2.68 0.04 0.07 14.57 0
    铁酸钙 2.09 4.67 1.14 0 1.46 2.00 1.41 1.19 1.85 1.28
    玻璃质 0.03 0 0.05 0 0.01 0.03 0.09 0.01 0.05 0.07
    碳氧化钛 0.01 0 0.01 0 0.03 0.02 0 0 0 0
    碳氮化钛 0 0 0 100.00 0.05 0.01 0 0 0 0
    其它 1.00 1.03 1.09 0 0.37 1.20 1.64 0.55 2.33 0.82
    *注:碳氮化钛为0.005225%,碳氮化钛物相0.006066%。
    下载: 导出CSV

    表  9  烧结矿软熔滴落渣的物相组成和元素分布

    Table  9.   Phase and element distribution of dripping slag during softening

    矿物名称w/%化学成分/%
    FeONTiVSiCaMgAl
    黄长石 57.84 8.98 59.91 0 41.28 62.71 71.22 63.54 53.06 61.51
    钙钛矿 16.33 2.12 15.87 0 45.05 32.97 3.45 18.32 3.22 5.47
    金属铁 3.50 79.48 0.04 0 0.10 0.34 0.11 0.08 0.18 0.15
    辉石 20.94 0.01 23.04 0 12.93 2.88 23.96 17.24 41.61 31.88
    透辉石 0.28 0.06 0.35 0 0.08 0.16 0.40 0.24 0.57 0.21
    镁铝尖晶石 0.01 0 0.01 0 0 0.01 0 0 0.02 0.04
    铁酸钙 0.57 5.37 0.32 0 0.39 0.56 0.36 0.32 0.55 0.35
    碳氮化钛 0.454* 0 0 100.00 0 0 0 0 0 0
    其它 0.54 3.98 0.46 0 0.17 0.38 0.51 0.27 0.79 0.41
    *注:碳氮化钛为0.000454%。
    下载: 导出CSV

    表  10  烧结矿重熔未滴落渣的物相组成和元素分布

    Table  10.   Phase and element distribution of residual slag in graphite crucible during remelting

    矿物w/%化学成分/%
    FeONTiVSiCaMgAl
    黄长石53.161.7859.290.0017.9929.3072.5464.6850.7969.71
    钙钛矿16.920.5717.380.0065.5947.471.9119.992.545.18
    金属铁9.6190.430.310.001.023.580.830.631.391.16
    辉石5.320.246.150.005.372.505.733.8711.279.26
    透辉石8.870.4410.510.002.066.9612.938.3123.372.96
    钙铁辉石2.485.662.240.000.842.802.911.723.202.57
    镁铝尖晶石1.610.142.050.001.513.620.200.205.317.64
    碳氮化钛0.310.010.01100.002.430.430.050.050.060.00
    碳氧化钛0.390.000.340.001.971.340.210.190.340.27
    其它1.320.741.720.001.222.012.690.361.741.25
    下载: 导出CSV

    表  11  不同炉渣主要物相组成对比

    Table  11.   Main phase composition of different slags %

    样品名称黄长石钙钛矿辉石其它
    软熔液泛渣71.9322.922.113.04
    软熔未滴落渣45.9029.2416.788.08
    软熔滴落渣59.9316.9221.991.16
    重熔未滴落渣58.8218.7218.444.02
    下载: 导出CSV

    表  12  生产高炉渣的化学成分

    Table  12.   Chemical composition of blast furnace slag during production %

    CaOSiO2MgOAl2O3TiO2V2O5SR2
    27.0324.728.1113.0921.850.240.501.09
    下载: 导出CSV
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  • 收稿日期:  2021-06-28
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    /

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    返回