Enhancing the hydration reactivity of hemi-hydrate phosphogypsum through a morphology-controlled preparation technology

›› 2016, Vol. 24 ›› Issue (9): 1298-1305.

• Materials and Product Engineering • 上一篇下一篇

Enhancing the hydration reactivity of hemi-hydrate phosphogypsum through a morphology-controlled preparation technology

Lin Yang^1,2, Jianxin Cao^1,3, Caiyu Li¹

1 School of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, China;
2 College of Resource and Environmental Engineering, Guizhou University, Guiyang 550025, China;
3 Guizhou Key Laboratory for Green Chemical and Clean Energy Technology, Guiyang 550025, China

收稿日期:2015-12-02 修回日期:2016-03-03 出版日期:2016-09-28 发布日期:2016-11-11
通讯作者: Jianxin Cao,E-mail address:jxcao@gzu.edu.cn
基金资助:
Supported by the Guizhou Province Fund Project (2014)7618.

Enhancing the hydration reactivity of hemi-hydrate phosphogypsum through a morphology-controlled preparation technology

Lin Yang^1,2, Jianxin Cao^1,3, Caiyu Li¹

1 School of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, China;
2 College of Resource and Environmental Engineering, Guizhou University, Guiyang 550025, China;
3 Guizhou Key Laboratory for Green Chemical and Clean Energy Technology, Guiyang 550025, China

Received:2015-12-02 Revised:2016-03-03 Online:2016-09-28 Published:2016-11-11
Supported by:
Supported by the Guizhou Province Fund Project (2014)7618.

摘要/Abstract

摘要： The distribution of water channels in the crystal morphology of type-α hemi-hydrated gypsum (α-HH) was theoretically detected to investigate the effect of water channels on the hydration reactivity of hemi-hydrate phosphogypsum (HPG). Results showed that water channels were mainly distributed in the cylinders of α-HH crystal, whereas no water channel existed in the conical surfaces parallel to the z-axis. Increasing the number of water channels was critical to enhance the hydration activity of HPG compared with the hydration reactivity of industrial HPG and type-α high-strength gypsum. Controlling the technological parameters of crystallization by concentration of liquid-phase SO₄^2- made it possible to obtain HPG which had the stumpy crystals of α-HH and high hydration reactivity.

关键词: Hydration reactivity, Morphology-controlled, Water channel, Hemi-hydrated phosphogypsum

Abstract: The distribution of water channels in the crystal morphology of type-α hemi-hydrated gypsum (α-HH) was theoretically detected to investigate the effect of water channels on the hydration reactivity of hemi-hydrate phosphogypsum (HPG). Results showed that water channels were mainly distributed in the cylinders of α-HH crystal, whereas no water channel existed in the conical surfaces parallel to the z-axis. Increasing the number of water channels was critical to enhance the hydration activity of HPG compared with the hydration reactivity of industrial HPG and type-α high-strength gypsum. Controlling the technological parameters of crystallization by concentration of liquid-phase SO₄^2- made it possible to obtain HPG which had the stumpy crystals of α-HH and high hydration reactivity.

Key words: Hydration reactivity, Morphology-controlled, Water channel, Hemi-hydrated phosphogypsum

中图分类号:

10.1016/j.cjche.2016.04.006

Lin Yang, Jianxin Cao, Caiyu Li. Enhancing the hydration reactivity of hemi-hydrate phosphogypsum through a morphology-controlled preparation technology[J]. , 2016, 24(9): 1298-1305.

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Enhancing the hydration reactivity of hemi-hydrate phosphogypsum through a morphology-controlled preparation technology

Enhancing the hydration reactivity of hemi-hydrate phosphogypsum through a morphology-controlled preparation technology

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