| 半水磷石膏的矿物学特征 |
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| 引用本文： | 杨林,曹建新,刘亚明.半水磷石膏的矿物学特征[J].岩石矿物学杂志,2015,34(6):827-834. |
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| 作者姓名： | 杨林 曹建新 刘亚明 |
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| 作者单位： | 贵州大学资源与环境工程学院, 贵州 贵阳 550025;贵州大学化学与化工学院, 贵州 贵阳 550025;贵州大学化学与化工学院, 贵州 贵阳 550025;贵州大学化学与化工学院, 贵州 贵阳 550025 |
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| 基金项目： | 黔科合LH字[2014]7618;黔科合重大专项字[20116023] |
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| 摘 要： | 讨论了半水磷石膏的化学组成、矿物组成、热性能、微观形貌以及胶凝性能。结果表明:半水磷石膏中主要化学组成为CaO和SO3,其总量达到70%,含有少量的结晶水和P2O5;半水磷石膏中含有放射性元素,但未超过GB/T6566-2010《建筑材料放射性核素限量》的限值;半水磷石膏矿物组成主要是α型的烧石膏相,但其放热峰面积小,主要以不同取向的硫酸钙晶体的聚晶形式存在,胶凝性能差,烘干强度仅为0.38 MPa。半水磷石膏与二水石膏制备的α型半水石膏在微观形貌上存在较大差异,将其直接应用于建筑材料还有待于进一步研究。
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| 关 键 词： | 半水磷石膏 矿物学特征 胶凝性能 建筑石膏 |
| 收稿时间： | 2014/12/23 0:00:00 |
| 修稿时间： | 2015/9/17 0:00:00 |
Mineralogical characteristics of hemi-hydrate phosphogypsum |
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| YANG Lin,CAO Jian-xin and LIU Ya-ming.Mineralogical characteristics of hemi-hydrate phosphogypsum[J].Acta Petrologica Et Mineralogica,2015,34(6):827-834. |
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| Authors: | YANG Lin CAO Jian-xin and LIU Ya-ming |
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| Institution: | College of Resource and Environmental Engineering, Guizhou University, Guiyang 550025, China;School of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, China;School of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, China;School of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, China |
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| Abstract: | In this paper, chemical composition, mineral composition, thermal properties, microstructure and binding characteristics of hemi-hydrate phosphogypsum were studied. The results showed that the chemical composition of hemi-hydrate phosphogypsum mainly consists of CaO and SO3(up to 70% by mass), with a small amount of crystal water and P2O5. The hemi-hydrate phosphogypsum has radioactive elements, which meet the requirement of GB/T6566-2010 Limit of radionuclides in building materials. Mineral composition of hemi-hydrate phosphogypsum is mainly bassanite, whose exothermic peak is weak. Hemi-hydrate phosphogypsum is almost in aggregation made of irregularly oriented calcium sulfate crystals, and its binding characteristics are poor, with dry strength being 0.38 MPa. There exists difference between hemi-hydrate phosphogypsum and bassanite prepared by gypsum as raw material, and hence the direct application of hemi-hydrate phosphogypsum to building materials needs further study. |
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| Keywords: | hemi-hydrate phosphogypsum mineralogical characteristics binding characteristics calcined gypsum |
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