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含钛高炉渣碳化过程钛-渣分离研究

简廷芳 赵朗 罗翔宇 扈玫珑

简廷芳, 赵朗, 罗翔宇, 扈玫珑. 含钛高炉渣碳化过程钛-渣分离研究[J]. 钢铁钒钛, 2021, 42(6): 51-58. doi: 10.7513/j.issn.1004-7638.2021.06.006
引用本文: 简廷芳, 赵朗, 罗翔宇, 扈玫珑. 含钛高炉渣碳化过程钛-渣分离研究[J]. 钢铁钒钛, 2021, 42(6): 51-58. doi: 10.7513/j.issn.1004-7638.2021.06.006
Jian Tingfang, Zhao Lang, Luo Xiangyu, Hu Meilong. Study on separation of titanium and slag during carbonization of titanium-bearing blast furnace slag[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(6): 51-58. doi: 10.7513/j.issn.1004-7638.2021.06.006
Citation: Jian Tingfang, Zhao Lang, Luo Xiangyu, Hu Meilong. Study on separation of titanium and slag during carbonization of titanium-bearing blast furnace slag[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(6): 51-58. doi: 10.7513/j.issn.1004-7638.2021.06.006

含钛高炉渣碳化过程钛-渣分离研究

doi: 10.7513/j.issn.1004-7638.2021.06.006
基金项目: 国家重点研发计划项目 (2018 YFC190050404) 资助。
详细信息
    作者简介:

    扈玫珑(1980—),女,甘肃会宁人,教授,博士生导师,通讯作者,主要从事冶金固废有价资源综合利用、高熵合金及钛合金低成本制备及性能提升、加钛护炉等方面研究, E-mail:hml@cqu.edu.cn

  • 中图分类号: TF823, X757

Study on separation of titanium and slag during carbonization of titanium-bearing blast furnace slag

  • 摘要: 高炉冶炼钒钛矿过程产生了大量含钛高炉渣,攀钢针对渣中钛资源的回收利用成功开发出了高温碳化-低温氯化工艺,但是该工艺存在碳化渣磨矿和氯化尾渣利用等技术性难题,还需要继续探索绿色、经济的处理方法。针对高温碳化过程中Ti(C,N) 弥散分布的问题,提出高温碳化过程加铁富集Ti(C,N)的思路,试验考察了铁/渣(质量比)、生铁添加批次、保温富集时间及预配铁量等因素对富集过程的影响。结果表明,熔渣中Ti(C,N)能聚集在熔铁表面并随其下沉至坩埚底部,水淬后附着有Ti(C,N)的铁块可与残渣实现自然分离,按铁/渣为1.50,在原料中预配15%铁,1600 ℃保温30 min后于30 min内分批向熔渣中加入铁的富集效果较好,可将渣中Ti含量从13.79%降低到4.59%,Ti的回收率达到66.72%。
  • 图  1  不同铁/渣富集试验所得残渣和附有Ti(C,N)的铁块照片实物

    (a)铁/渣为0.70; (b)铁/渣为1.50; (c)铁/渣为2.00

    Figure  1.  Photos of residual slag and lump iron coated by Ti(C,N) obtained by different mass ratios of iron to slag

    图  2  附着有Ti(C,N)的铁块表面XRD谱

    Figure  2.  XRD patterns of lump iron coated by Ti(C,N)

    图  3  不同铁/渣富集试验所得残渣的XRD谱

    (a)铁/渣为0.70;(b)铁/渣为2.00;(c)铁/渣为1.50,上部渣;(d)铁/渣为1.50,下部渣

    Figure  3.  XRD patterns of residual slags obtained by different mass ratios

    图  4  不同批次加铁富集实验所得残渣和附有Ti(C,N)的铁块的实物

    (a) 一次性加铁;(b) 分批加铁

    Figure  4.  Photos of residual slags and lump iron coated by Ti(C,N) obtained by different batches of Fe

    图  5  分不同批次加铁富集试验所得残渣XRD谱

    (a) 疏松多孔的上部渣;(b)质密的下部渣

    Figure  5.  XRD patterns of residual slags obtained by different batches of Fe addition

    图  6  不同时间的保温富集所得残渣XRD衍射谱

    (a) 保温60 min后在60 min内加铁富集所得残渣;(b)保温30 min后在30 min内加铁富集所得下部渣;(c)保温30 min后在30 min内加铁富集所得上部渣

    Figure  6.  XRD pattern of residual slags obtained by different holding time for enrichment

    图  7  预配不同质量的Fe富集试验所得残渣和附有Ti(C,N)的铁饼实物

    Figure  7.  Photo of residual slag and lump iron coated by Ti (C,N) obtained by varying content of pre-added Fe

    (a)15%;(b)30%;(c)75%

    图  8  预配不同质量的Fe富集试验所得上部渣和下部渣的XRD谱

    Figure  8.  XRD patterns of residual slags obtained by different pre-adding content

    (a) 上部渣;(b) 下部渣

    图  9  电解分离前后铁块实物

    (a)电解分离前; (b)电解分离后

    Figure  9.  Photos of the lump iron before and after electrolysis

    图  10  酸浸分离前后铁块实物

    (a)酸浸分离前; (b)酸浸分离后

    Figure  10.  Photos of the lump iron before and after acid leaching

    表  1  含钛高炉渣化学组成

    Table  1.   Chemical compositions of Ti-bearing blast furnace slag %

    TiO2CaOSiO2Al2O3MgO
    2328.826.2148
    下载: 导出CSV

    表  2  试验方案

    Table  2.   Experimental scheme

    序号铁/渣预配铁/%添加批次总保温时间
    /min
    富集开始时间/min
    10.70059030
    21.50059030
    32.00059030
    41.500115060
    51.500515060
    61.5001015060
    71.501559030
    81.503059030
    91.507559030
    下载: 导出CSV
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  • 收稿日期:  2021-09-13
  • 刊出日期:  2021-12-31

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