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
环境·健康·安全

β石膏相组成和杂质含量对其性能的影响

  • 吴照洋 ,
  • 张永兴 ,
  • 张利珍 ,
  • 张秀峰
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  • 1.中国地质科学院郑州矿产综合利用研究所,河南郑州450006
    2.国家非金属矿资源综合利用工程技术研究中心
    3.西北地质科技创新中心
吴照洋(1982— ),男,硕士研究生,助理研究员,主要从事矿物材料的制备研究;E-mail: wzy500@sina.com
张永兴(1986— ),男,硕士研究生,助理研究员,主要从事尾矿材料化制备研究;E-mail: 599044279@qq.com

收稿日期: 2020-11-04

  网络出版日期: 2021-09-08

基金资助

中国地质调查局地质调查项目(DD20190590)

版权

《无机盐工业》编辑部, 2021, 版权所有,未经授权,不得转载、摘编本刊文章,不得使用本刊的版式设计。

Effect of phase composition and impurity content of β-gypsum on its properties

  • Wu Zhaoyang ,
  • Zhang Yongxing ,
  • Zhang Lizhen ,
  • Zhang Xiufeng
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  • 1. Zhengzhou Institute of Multipurpose Utilization of Mineral Resources,CAGS,Zhengzhou 450006,China
    2. China National Engineering Research Center for Utilization of Industrial Minerals
    3. Northwest China Center for Geosience Innovation

Received date: 2020-11-04

  Online published: 2021-09-08

Copyright

, 2021, Copyright reserved © 2021. Office of INORGANIC CHEMICALS INDUSTRY All articles published represent the opinions of the authors, and do not reflect the official policy of the Chinese Medical Association or the Editorial Board, unless this is clearly specified.

摘要

为更好地利用磷石膏资源,发挥磷石膏的最大价值,以磷建筑石膏粉为原料,通过化学成分计算,合理调配其中的二水石膏、硬石膏和半水石膏含量,引入可溶性五氧化二磷、氟化钠、氯化钠来调整其中的水溶性五氧化二磷、水溶性氟离子和氯离子含量,通过对凝结时间和力学性能的测试来研究相组成和杂质含量对其性能的影响。结果表明:二水石膏质量分数低于3%时会加速建筑石膏的水化反应、增强其早期强度,半水石膏质量分数在77%左右时建筑石膏的力学性能较好,无水石膏质量分数超过15%时建筑石膏的力学性能下降较大;当利用磷石膏制备建筑石膏粉时,水溶性五氧化二磷质量分数宜控制在0.2%以下,水溶性氟离子质量分数宜控制在0.3%以下,氯离子质量分数宜控制在0.04%以下。从相组成和杂质控制的角度,该研究为磷石膏的资源化利用提供了借鉴和参考,有助于提升中国磷石膏的利用水平。

本文引用格式

吴照洋 , 张永兴 , 张利珍 , 张秀峰 . β石膏相组成和杂质含量对其性能的影响[J]. 无机盐工业, 2021 , 53(9) : 67 -71 . DOI: 10.19964/j.issn.1006-4990.2020-0594

Abstract

In order to make better use of phosphogypsum resources and paly its utmost value,using phosphogypsum powder as raw material,the content of dihydrate gypsum,anhydrite and hemihydrate gypsum were reasonably allocated after calculating the chemical composition,the content of water-soluble P2O5,water-soluble F- and Cl- were adjusted by introducing soluble P2O5,NaF and NaCl.The effect of phase composition and impurity content on its properties was studied by testing the setting time and mechanical properties.The results showed that when the mass fraction of dihydrate gypsum was lower than 3%,the hydration reaction of building gypsum would be accelerated,and its early strength effect could be enhanced.When the mass fraction of hemihydrate gypsum was about 77%,its mechanical properties would be better,and when the mass fraction of an-hydrite was more than 15%,its mechanical properties would decrease greatly.When building gypsum powder was prepared from phosphogypsum,the mass fraction of water-soluble P2O5,water-soluble F- and Cl- should be controlled below 0.2%,0.3% and 0.04%,respectively.From the perspective of phase composition and impurity control,this paper provides reference for the resource utilization of phosphogypsum and helps to improve the utilization level of phosphogypsum in China.

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