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首页> 外文期刊>Journal of Hazardous Materials >Sn separation from Sn-bearing iron concentrates by roasting with waste tire rubber in N_2 + CO + CO_2 mixed gases
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Sn separation from Sn-bearing iron concentrates by roasting with waste tire rubber in N_2 + CO + CO_2 mixed gases

机译：用废轮胎橡胶在N_2 + CO + CO_2混合气体中焙烧从含锡铁精矿中分离出锡

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摘要

The waste tire rubber releases CO, H2S, SO2 and COS during pyrolysis process in N-2 + CO + CO2 mixed gases, which can reduce and sulfurize SnO2 to SnS thermodynamically. Correspondingly, a new process to separate Sn from Sn-bearing iron concentrates through roasting with waste tire rubbers at a relative low temperature (1273 K) is put forward in the present paper. The formation of Fe-Sn alloy restricts Sn volatilization obviously during the roasting process, and its formation mechanism differs related to roasting temperature and CO content in the mixed gases. The Fe-Sn alloy formation could be weakened and the Sn residual content is decreased to 0.020 wt % at a roasting temperature of 1273 K and waste tire rubber amount of 10 wt %. Meanwhile, the Fe content in the roasted residue increases to 72.25 wt % through a reduction of Fe3O4 to FeO under a mixed gas of 58% N-2 + 21%CO + 21%CO2, realizing the tin removal and iron resource utilization from Sn-bearing concentrates. Besides, the zinc which originated from waste tire rubber in the roasted residue is low to 0.015 wt %, implying that it is concentrated in the dust and could be recovered using a dust collection process.
机译：废轮胎橡胶在N-2 + CO + CO2混合气体中的热解过程中释放CO，H2S，SO2和COS，可以热力学将SnO2还原并硫化成SnS。相应地，本文提出了一种通过在较低的温度（1273 K）下用废轮胎橡胶焙烧从含锡铁精矿中分离出锡的新工艺。 Fe-Sn合金的形成明显抑制了焙烧过程中Sn的挥发，其形成机理与焙烧温度和混合气体中CO含量有关。在焙烧温度为1273 K，废轮胎橡胶量为10 wt％的情况下，可以减弱Fe-Sn合金的形成并将Sn残留含量降低至0.020 wt％。同时，在58％N-2 + 21％CO + 21％CO2的混合气体下，通过将Fe3O4还原为FeO，将焙烧残渣中的Fe含量提高到72.25 wt％，实现了锡中锡的去除和铁资源的利用。轴承精矿。此外，在烘烤后的残留物中源自废轮胎橡胶的锌含量低至0.015wt％，这意味着其集中在粉尘中并且可以使用粉尘收集工艺进行回收。

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  • 来源
    《Journal of Hazardous Materials》 |2019年第5期|440-448|共9页
  • 作者

    Yu Yong; Li Lei; Wang Jiayun; Wang Jingcheng; Li Kongzhai;

  • 作者单位

    Kunming Univ Sci & Technol, State Key Lab Complex Nonferrous Met Resources Cl, Kunming 650093, Yunnan, Peoples R China|Kunming Univ Sci & Technol, Engn Res Ctr Met Energy Conservat & Emiss Reduct, Minist Educ, Kunming 650093, Yunnan, Peoples R China|Kunming Univ Sci & Technol, Fac Met & Energy Engn, Kunming 650093, Yunnan, Peoples R China;

    Kunming Univ Sci & Technol, State Key Lab Complex Nonferrous Met Resources Cl, Kunming 650093, Yunnan, Peoples R China|Kunming Univ Sci & Technol, Engn Res Ctr Met Energy Conservat & Emiss Reduct, Minist Educ, Kunming 650093, Yunnan, Peoples R China|Kunming Univ Sci & Technol, Fac Met & Energy Engn, Kunming 650093, Yunnan, Peoples R China;

    Kunming Univ Sci & Technol, State Key Lab Complex Nonferrous Met Resources Cl, Kunming 650093, Yunnan, Peoples R China|Kunming Univ Sci & Technol, Engn Res Ctr Met Energy Conservat & Emiss Reduct, Minist Educ, Kunming 650093, Yunnan, Peoples R China|Kunming Univ Sci & Technol, Fac Met & Energy Engn, Kunming 650093, Yunnan, Peoples R China;

    Kunming Univ Sci & Technol, State Key Lab Complex Nonferrous Met Resources Cl, Kunming 650093, Yunnan, Peoples R China|Kunming Univ Sci & Technol, Engn Res Ctr Met Energy Conservat & Emiss Reduct, Minist Educ, Kunming 650093, Yunnan, Peoples R China|Kunming Univ Sci & Technol, Fac Met & Energy Engn, Kunming 650093, Yunnan, Peoples R China;

    Kunming Univ Sci & Technol, State Key Lab Complex Nonferrous Met Resources Cl, Kunming 650093, Yunnan, Peoples R China|Kunming Univ Sci & Technol, Engn Res Ctr Met Energy Conservat & Emiss Reduct, Minist Educ, Kunming 650093, Yunnan, Peoples R China|Kunming Univ Sci & Technol, Fac Met & Energy Engn, Kunming 650093, Yunnan, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Sn-bearing iron concentrates; Waste tire rubber; Sn separation; Fe-Sn alloy; Sulfur;

    机译：含锡铁精矿;废轮胎橡胶;Sn分离;Fe-Sn合金;硫;

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