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 (12): 111-118.doi: 10.19964/j.issn.1006-4990.2023-0068

• 环境·健康·安全 • 上一篇    下一篇

磷尾矿中物质元素的赋存状态与分布

杨俊杰1,2(), 董永刚2, 张静1,2, 张煜1,2, 曹建新1,3()   

  1. 1.贵州大学化学与化工学院,贵州 贵阳 550025
    2.贵州省绿色化工与清洁能源技术重点实验室,贵州 贵阳 550025
    3.贵州省废弃物高效利用工程研究中心,贵州 贵阳 550025
  • 收稿日期:2023-02-13 出版日期:2023-12-10 发布日期:2023-12-14
  • 通讯作者: 曹建新(1956— ),男,博士,教授,研究方向为绿色化工;E-mail:jxcao@gzu.edu.cn
  • 作者简介:杨俊杰(1997— ),男,硕士,研究方向为固废资源化利用;E-mail:981961813@qq.com
  • 基金资助:
    国家重点研发计划项目(2018YFC1900206-2)

Occurrence and distribution of matter elements in phosphorus tailings

YANG Junjie1,2(), DONG Yonggang2, ZHANG Jing1,2, ZHANG Yu1,2, CAO Jianxin1,3()   

  1. 1. School of Chemistry and Chemical Engineering,Guizhou University,Guiyang 550025,China
    2. Guizhou Key Laboratory for Green Chemical and Clean Energy Technology,Guiyang 550025,China
    3. Guizhou Provincial Engineering Research Center of Efficient Utilization for Waster,Guiyang 550025,China
  • Received:2023-02-13 Published:2023-12-10 Online:2023-12-14

摘要:

采用湿法磷酸工艺进行磷酸生产前需将磷矿进行浮选处理,磷含量较低的磷矿不适宜用于磷酸生产而弃置,造成大量磷尾矿的堆存,不但会造成环境污染,而且若不加以合理利用,将会造成资源的浪费。由于磷尾矿中仍然有较多的钙、镁等元素,因此可针对其元素的富集情况对磷尾矿加以利用。采用X射线衍射分析仪、电感耦合等离子质谱仪、拉曼光谱仪、扫描电镜、电子探针、X射线光电子能谱等表征方法,对磷尾矿中钙、镁等主要元素的赋存形式及分布规律进行分析。结果表明:磷尾矿中钙元素分布广泛,大量与镁元素结合并以白云石的形式存在,少量与氟、磷等元素以氟磷灰石及其他含钙化合物的形式存在;同时通过对磷尾矿的全分析,得到了其中各元素的存在形式和赋存状态,为后续磷尾矿中钙、镁的进一步利用提供指导。

关键词: 磷尾矿, 钙元素, 镁元素, 存在形式, 赋存状态

Abstract:

Phosphorite needs flotation treatment to be used in the wet phosphoric acid process.Phosphorite with low phosphorus content is not suitable for phosphoric acid production and discarded,resulting in the accumulation of a large number of phosphorous tailings,which will not only cause environmental pollution,but also cause waste of resources if it is not rationally used.Since there are still more elements such as calcium and magnesium in the phosphorus tailings,the phosphorus tailings can be used according to the enrichment of the elements.Therefore,the occurrence and distribution of main elements such as calcium and magnesium in phosphorus tailings were analyzed by X-ray diffraction analyzer,inductively coupled plasma mass spectrometer,Raman spectrometer,scanning electron microscope,electron probe and X-ray photoelectron spectroscopy.The results showed that calcium was widely distributed in phosphorus tailings,and a large amount of calcium existed in the form of dolomite combined with magnesium,while a small amount of calcium existed in the form of fluorapatite and other calcium-containing compounds with fluorine and phosphorus.Through the complete analysis of phosphorus tailings,the existence form and occurrence state of each element were obtained.It provided guidance for further utilization of calcium and magnesium in phosphorus tailings.

Key words: phosphorus tailings, calcium element, magnesium element, form of existence, occurrence state

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