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Role of manganese dioxide in the recovery of oxide-sulphide zinc ore

机译:二氧化锰在氧化硫锌矿的回收中的作用

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摘要

In this article, the role of MnO2 in the recovery of oxide-sulphide zinc ore discussed. Through adopting various modern analysis techniques (such as X-ray diffraction pattern, X-ray photoelectron spectroscopy, scanning electron microscope, energy dispersive X-ray analysis, and fourier transform infrared spectroscopy), the function and mechanism of MnO2 during the phase transformation process is found out. Thermodynamic mechanisms involved in the phase transformation process with or without addition of manganese dioxide investigated by exploiting the Equilib module of FactSage. What's more, XRD patterns, XPS spectra and SEM-EDAX analyses of zinc calcines verify well the calculations of Fact Sage. Results reveal that the addition of MnO2 will produce an aggregation of ZnMn2O4, a valuable energy material, while roasting on its own, results in generating undesirable Zn2SiO4, the oxidation degree being relatively low. Moreover, XRD pattern of zinc calcine and FT-IR spectrum of yellow product collected in the calcination process prove that the sulphur-fixing value of the additive MnO2, which can promote transforming to the elemental sulphur. The volatile S can be collected through a simple guiding device. In this process, the emission of SO2 effectively avoids, thus MnO2 deems as a potential additive in the recovery of oxide-sulphide zinc ore. (C) 2017 Published by Elsevier B.V.
机译:在本文中,讨论了MnO2在回收氧化硫锌矿中的作用。通过采用各种现代分析技术(例如X射线衍射图,X射线光电子能谱,扫描电子显微镜,能量色散X射线分析和傅立叶变换红外光谱),MnO2在相变过程中的作用和机理被发现。通过利用FactSage的Equilib模块研究了添加或不添加二氧化锰的相变过程涉及的热力学机理。此外,锌煅烧料的XRD图谱,XPS光谱和SEM-EDAX分析都很好地证明了Fact Sage的计算结果。结果表明,MnO2的添加将产生ZnMn2O4的聚集体,ZnMn2O4是一种有价值的能量材料,同时单独焙烧会导致生成不良的Zn2SiO4,其氧化度相对较低。此外,煅烧过程中收集的锌煅烧锌的XRD图谱和黄色产物的FT-IR光谱证明,添加剂MnO2的固硫值可以促进向元素硫的转化。挥发性物质S可通过简单的引导装置收集。在此过程中,有效地避免了SO2的排放,因此MnO2被认为是氧化物-硫化物锌矿石回收中的潜在添加剂。 (C)2017由Elsevier B.V.发布

著录项

  • 来源
    《Journal of Hazardous Materials》 |2018年第5期|315-323|共9页
  • 作者单位

    Yunnan Prov Key Lab Intensificat Met, Kunming 650093, Yunnan, Peoples R China|Natl Local Joint Lab Engn Applicat Microwave Ener, Kunming 650093, Yunnan, Peoples R China|Kunming Univ Sci & Technol, Fac Met & Energy Engn, Kunming 650093, Yunnan, Peoples R China;

    Yunnan Prov Key Lab Intensificat Met, Kunming 650093, Yunnan, Peoples R China|Natl Local Joint Lab Engn Applicat Microwave Ener, Kunming 650093, Yunnan, Peoples R China|Kunming Univ Sci & Technol, Fac Met & Energy Engn, Kunming 650093, Yunnan, Peoples R China;

    Yunnan Tin Vocat & Tech Coll, Mat & Met Chem Engn Dept, Gejiu 661000, Yunnan, Peoples R China;

    Yunnan Prov Key Lab Intensificat Met, Kunming 650093, Yunnan, Peoples R China|Natl Local Joint Lab Engn Applicat Microwave Ener, Kunming 650093, Yunnan, Peoples R China|Kunming Univ Sci & Technol, Fac Met & Energy Engn, Kunming 650093, Yunnan, Peoples R China;

    Yunnan Prov Key Lab Intensificat Met, Kunming 650093, Yunnan, Peoples R China|Natl Local Joint Lab Engn Applicat Microwave Ener, Kunming 650093, Yunnan, Peoples R China|Kunming Univ Sci & Technol, Fac Met & Energy Engn, Kunming 650093, Yunnan, Peoples R China;

    Yunnan Prov Key Lab Intensificat Met, Kunming 650093, Yunnan, Peoples R China|Natl Local Joint Lab Engn Applicat Microwave Ener, Kunming 650093, Yunnan, Peoples R China|Kunming Univ Sci & Technol, Fac Met & Energy Engn, Kunming 650093, Yunnan, Peoples R China;

    Yunnan Prov Key Lab Intensificat Met, Kunming 650093, Yunnan, Peoples R China|Natl Local Joint Lab Engn Applicat Microwave Ener, Kunming 650093, Yunnan, Peoples R China|Kunming Univ Sci & Technol, Fac Met & Energy Engn, Kunming 650093, Yunnan, Peoples R China;

    Yunnan Prov Key Lab Intensificat Met, Kunming 650093, Yunnan, Peoples R China|Natl Local Joint Lab Engn Applicat Microwave Ener, 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

    MnO2; Oxide-sulphide zinc ore; Phase transformation; Sulphur-fixing;

    机译:MnO2;氧化物-硫化锌矿;相变;固硫;
  • 入库时间 2022-08-17 13:21:45

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