湿法堆存工艺中磷石膏固结特性研究
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摘要
从磷石膏生成过程分析磷石膏的化学特性和物理力学特性,由分析可知湿法堆存工艺中堆积体透水性较强,固结速度较快,力学强度较高。磷石膏独特的形貌特征和粒径分布,决定其水力冲积填筑规律与尾矿有明显的差异。在排水和蒸发作用下,磷石膏堆积体表层固结速度非常快。在深部压缩与结晶共同作用下,磷石膏堆积体能够在较短的时间内固结为半成岩。
The chemical and physical mechanical properties of phosphogypsum are analyzed from the formation process of phosphogypsum.It can be seen from the analysis that the wet storage technology has strong permeability,fast consolidation speed and high mechanical strength.The unique morphological characteristics and particle size distribution of phosphogypsum determine that its hydraulic alluvial filling law is significantly different from that of tailings.Under the action of drainage and evaporation,the surface consolidation speed of phosphogypsum deposits is very fast.Under the combined action of deep compression and crystallization,phosphogypsum deposits can consolidate into semi-diagenetic rocks in a relatively short time.
The chemical and physical mechanical properties of phosphogypsum are analyzed from the formation process of phosphogypsum.It can be seen from the analysis that the wet storage technology has strong permeability,fast consolidation speed and high mechanical strength.The unique morphological characteristics and particle size distribution of phosphogypsum determine that its hydraulic alluvial filling law is significantly different from that of tailings.Under the action of drainage and evaporation,the surface consolidation speed of phosphogypsum deposits is very fast.Under the combined action of deep compression and crystallization,phosphogypsum deposits can consolidate into semi-diagenetic rocks in a relatively short time.
引文
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[2]葛祖元.磷石膏渣场的规划建设与运行管理[J].磷肥与复肥,2009,24(5):25-29.
[3]叶学东.磷石膏综合利用现状及分析[J].磷肥与复肥,2013,28(6):5-8.
[4]盛勇,梅胜明,陈明凤.我国磷石膏综合利用技术的现状和发展方向[J].磷肥与复肥,2010,25(6):56-58.
[5]韩敏芳,王军伟,刘泽.世界性的研究课题:磷石膏特性及开发前景[J].国外建材科技,2003(6):15-17.
[6]刘同海,窦焰,郑凌志,等.二水硫酸钙结晶体系的模拟与应用研究[J].化工矿物与加工,2015,44(11):28-32.
[7]吴佩芝.湿法磷酸[M].北京:化学工业出版社,1987.