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廢鈦基催化劑與釩鈦磁鐵礦制備含鈦球團性能對比

錢立新 陶家杰 范春龍 丁龍 龍紅明 楊濤 余正偉

錢立新, 陶家杰, 范春龍, 丁龍, 龍紅明, 楊濤, 余正偉. 廢鈦基催化劑與釩鈦磁鐵礦制備含鈦球團性能對比[J]. 工程科學學報, 2023, 45(10): 1740-1749. doi: 10.13374/j.issn2095-9389.2022.08.07.001
引用本文: 錢立新, 陶家杰, 范春龍, 丁龍, 龍紅明, 楊濤, 余正偉. 廢鈦基催化劑與釩鈦磁鐵礦制備含鈦球團性能對比[J]. 工程科學學報, 2023, 45(10): 1740-1749. doi: 10.13374/j.issn2095-9389.2022.08.07.001
QIAN Lixin, TAO Jiajie, FAN Chunlong, DING Long, LONG Hongming, YANG Tao, YU Zhengwei. Analysis of the titanium-bearing pellets prepared by a waste titanium-based catalyst and vanadium titanomagnetite[J]. Chinese Journal of Engineering, 2023, 45(10): 1740-1749. doi: 10.13374/j.issn2095-9389.2022.08.07.001
Citation: QIAN Lixin, TAO Jiajie, FAN Chunlong, DING Long, LONG Hongming, YANG Tao, YU Zhengwei. Analysis of the titanium-bearing pellets prepared by a waste titanium-based catalyst and vanadium titanomagnetite[J]. Chinese Journal of Engineering, 2023, 45(10): 1740-1749. doi: 10.13374/j.issn2095-9389.2022.08.07.001

廢鈦基催化劑與釩鈦磁鐵礦制備含鈦球團性能對比

doi: 10.13374/j.issn2095-9389.2022.08.07.001
基金項目: 國家自然科學基金資助項目(52174290,52204332);安徽省自然科學基金杰出青年資助項目(2208085J19)
詳細信息
    通訊作者:

    E-mail: yaflhm@126.com

  • 中圖分類號: FT52

Analysis of the titanium-bearing pellets prepared by a waste titanium-based catalyst and vanadium titanomagnetite

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  • 摘要: 鋼鐵企業煙氣脫硝廢催化劑(危廢)產生量逐年增加,加強對此類廢催化劑的有效處置與利用已成為行業急需解決的關鍵共性難題。本研究首次提出了將廢催化劑添加到球團原料中制備含鈦球團利用的新路徑。將含廢催化劑球團和市場普通含鈦球團的制備過程及冶金性能進行對比研究。結果表明:球團原料中添加質量分數5.0%的廢催化劑可以顯著提高生球綜合性能指標,且明顯優于以釩鈦磁鐵礦制備的普通含鈦球團。球團焙燒后,含廢催化劑球團平均抗壓強度為3083 N,高于普通含鈦球團的2630 N。含廢催化劑球團固結機理表明,廢催化劑中TiO2與鐵氧化物反應形成Fe2TiO5相粘結,部分未反應TiO2會降低球團抗壓強度。兩種含鈦球團冶金性能與普通氧化球團基本相同,說明含廢催化劑球團可以用于高爐護爐冶煉使用。本研究有望為鋼鐵企業煙氣脫硝產生的廢催化劑在企業內部資源化利用提供新思路。

     

  • 圖  1  廢催化劑宏觀結構及微觀形貌圖. (a)廢催化劑預處理過程;(b) 廢催化劑XRD圖譜;(c) 廢催化劑微觀形貌

    Figure  1.  Macrostructure and micromorphology of the waste catalyst: (a) pretreatment process of the waste catalyst; (b) XRD pattern of the waste catalyst; (c) micromorphology of the waste catalyst

    圖  2  不同生球團的落下強度和平均抗壓強度對比

    Figure  2.  Drop number and average compressive strength of different green pellets

    Pellet-1— ordinary oxidized pellets; Pellet-2— pellets containing waste catalysts;Pellet-3— ordinary titanium-bearing pellets

    圖  3  不同生球團爆裂溫度和干球平均抗壓強度對比

    Figure  3.  Burst temperature of green pellets and average compressive strength of dry pellets

    圖  4  不同球團預熱和焙燒后抗壓強度對比

    Figure  4.  Compressive strength of preheated and roasted pellets

    圖  5  不同球團焙燒后氣孔面積

    Figure  5.  Pore area of different roasted pellets

    圖  6  不同預熱球團XRD圖譜

    Figure  6.  XRD patterns of different preheated pellets

    圖  7  不同焙燒球團XRD圖譜

    Figure  7.  XRD patterns of different roasted pellets

    圖  8  不同焙燒球團礦相結構. (a)普通氧化球團; (b)普通含鈦球團; (c)含廢催化劑球團; (d)圖(c)中局部顆粒放大圖

    Figure  8.  Microstructure of different roasted pellets: (a) oxide pellet; (b) titanium pellet; (c) waste catalyst pellet; (d) enlargement of a local area in photograph (c)

    圖  9  含廢催化劑球團主要物相SEM圖. (a)廢催化劑顆粒;(b)照片(a)中局部放大圖

    Figure  9.  SEM image of the pellet containing waste catalyst: (a) waste catalyst particle; (b) enlargement of a local area in photograph (a)

    表  1  含鐵原料主要化學成分(質量分數)

    Table  1.   Main chemical compositions of iron-containing raw materials %

    Raw materialTFeFeOSiO2CaOMgOAl2O3TiO2V2O5K2ONa2O
    MCa65.7526.506.570.300.480.84
    VTMb53.6230.913.730.982.963.3512.170.53
    Bentonite2.2169.432.502.2117.402.482.77
    MC a: Magnetite concentrate; VTM b: Vanadium titanomagnetite.
    下載: 導出CSV

    表  2  含鐵原料粒度組成(質量分數)

    Table  2.   Particle size composition of iron-containing raw materials %

    Raw materialSize composition
    +0.074 mm+0.045–0.074 mm?0.074 mm?0.045 mm
    MC6.413.393.680.3
    VTM32.829.167.238.1
    下載: 導出CSV

    表  3  廢催化劑及堵塞物飛灰主要化學成分(質量分數)

    Table  3.   Main chemical composition of the waste catalyst and fly ash %

    TiO2WO3SiO2CaOAl2O3V2O5Fe2O3P2O5Na2OK2OSx
    87.274.663.641.320.870.520.070.150.120.090.43
    下載: 導出CSV

    表  4  不同球團礦RSI指數和密度

    Table  4.   RSI index and density of different pellets

    SchemePre-reduction volume/cm3Reduced volume/cm3RSI/%Pre-reduction mass/gPellet density/(g·cm?3)
    Pellet-122.124.29.687.243.95
    Pellet-223.525.69.185.753.65
    Pellet-322.824.68.187.103.82
    下載: 導出CSV

    表  5  不同球團礦RI和RDI性能

    Table  5.   RI and RDI performance of different pellets

    SchemeMass fraction of TFe/%Mass fraction of FeO/%RI/%RDI+6.3/%RDI+3.15/%RDI?0.5/%
    Pellet-164.380.7561.792.296.31.5
    Pellet-261.071.7963.396.697.81.2
    Pellet-360.031.0856.498.798.71.7
    下載: 導出CSV

    表  6  不同球團礦熔滴性能

    Table  6.   Meltdown properties of different roasted pellets

    SchemeTa/℃Ts/℃ΔTsa/℃Tm/℃Td/℃ΔTdm/℃
    Pellet-1115711984112051331126
    Pellet-2116312094712111341130
    Pellet-3118812284012381339101
    下載: 導出CSV

    表  7  含廢催化劑球團主要物相EDS結果

    Table  7.   EDS results of the pellets containing waste catalyst

    SchemeMass fraction/%
    OTiFeVWSi
    Point 135.9941.273.940.085.71
    Point 236.702.9760.32
    Point 331.570.5967.84
    Point 444.4030.6620.070.402.981.49
    下載: 導出CSV
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  • 收稿日期:  2022-08-07
  • 網絡出版日期:  2022-09-29
  • 刊出日期:  2023-10-25

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