无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2023, Vol. 55 ›› Issue (11): 47-52.doi: 10.19964/j.issn.1006-4990.2022-0740

• 研究与开发 • 上一篇    下一篇

次氧化锌火法脱氯制备高纯氧化锌的工艺研究

王松1(), 张建彬1, 申玉芳1(), 覃庶宏2, 王盛强2, 张静冰2   

  1. 1.桂林理工大学材料科学与工程学院,有色金属及材料加工新技术教育部重点实验室,广西 桂林 541000
    2.武宣县汇丰实业有限责任公司,广西武宣 545900
  • 收稿日期:2022-12-18 出版日期:2023-11-10 发布日期:2023-11-16
  • 通讯作者: 申玉芳,副教授,博士,主要从事材料领域教学与科研工作;E-mail:dinahyfsh@hotmail.com85152034@qq.com
  • 作者简介:王松(1997— ),男,硕士,主要从事材料物理化学方面的研究;E-mail:suongwang@163.com
  • 基金资助:
    广西重点研发计划项目(桂科AB20297014)

Study on preparation process of high-purity zinc oxide by dechlorination of zinc oxide dust

WANG Song1(), ZHANG Jianbin1, SHEN Yüfang1(), QIN Shuhong2, WANG Shengqiang2, ZHANG Jingbing2   

  1. 1.Key Laboratory of New Processing Technology for Nonferrous Metals and Materials,Ministry of Education,Guilin University of Technology,Guilin 541000,China
    2.Wuxuan Huifeng Industrial Co. Limited,Wuxuan 545900,China
  • Received:2022-12-18 Published:2023-11-10 Online:2023-11-16

摘要:

模拟研究了回转窑焙烧次氧化锌的火法脱氯工艺。通过热力学分析确定了焙烧温度范围,并采用高温煅烧工艺对次氧化锌粉进行热处理,探讨了焙烧过程中次氧化锌的氯脱除率、物相及形貌变化。对次氧化锌原料进行了X射线衍射分析(XRD)、X射线荧光分析(XRF)、扫描电子显微镜分析(SEM)。结果表明:次氧化锌主要成分为氧化锌,质量分数为76.14%,粒度为100~200 nm;其含氯杂质相主要为KCl和FeOCl,呈200~500 nm针状或树枝状团簇。热处理结果表明,在1 100 ℃、焙烧2 h条件下,氯脱除率达到97.63%,氧化锌纯度为94.81%,晶粒粒度从亚微米级增大至微米级,粒度为2~8 μm。

关键词: 次氧化锌, 焙烧, 脱氯, 高纯氧化锌

Abstract:

The dechlorination process of sintering zinc oxide dust in rotary kiln was simulated and studied.The sintering temperature range was determined by thermodynamic analysis, and the zinc oxide dust was heat treated by a high-temperature calcination process, and the changes of chlorine removal rate,phase and morphology of zinc oxide dust during the sintering process were discussed.The zinc oxide dust raw materials were characterized by X-ray diffraction analysis(XRD),X-ray fluorescence analysis(XRF) and scanning electron microscopy(SEM).The results showed that zinc oxide dust was an ultrafine powder of 100~200 nm, the main component was zinc oxide with mass fraction of 76.14%,and the main chlorine-containing compounds were KCl and FeOCl,which were needle-like or dendritic clusters of 200~500 nm.The heat treatment results showed that the chlorine removal rate reached 97.63%,the purity of zinc oxide was increased to 94.81%,and the grain size was increased significantly to 2~8 μm at 1 100 °C for sintering 2 h.

Key words: zinc oxide dust, sintering, dechlorination, high-purity zinc oxide

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