关于利用云南磷石膏制备磷建筑石膏预处理实验研究*

研究了水洗法、石灰中和法、浮选法和Hans法等不同预处理过程对云南磷建筑石膏强度及晶体形貌的影响。通过大量实验对比四种预处理效果,结果表明:经过四种预处理方法处理的磷石膏都基本都满足建材制品相关规定要求;其中Hans法对去除磷石膏中可溶性磷、氟及有机物效果最好,而且成本低,操作简单,样品强度高。而石灰中和法能够部分去除磷石膏中的无机杂质;水洗法能够较充分的去除磷石膏中的无机杂质;浮选法能有效去除磷石膏中的有机物,相比之下Hans法更加经济和操作性更强。

On Study of Pretreatment for Preparation of Gypsum Building Plaster with Yunnan Phosphorus

This paper studied effect of different pretreatment process on Yunnan phosphorus building gypsum strength and crystal morphology such as washing method, lime neutralization method, flotation method and Hans method. A lots experiment result indicated that basic properties of phosphorus building gypsum of different pretreatment methods could satisfy related building materials products technology requirements. While inorganic impurities could be effectively removed by lime neutralization method and washing method, as well as organics could be better removed by flotation method, however, compared with other methods, the Hans method possessed the best effect about removing soluble phosphorus, fluorine and organic compounds in phosphogypsum , and had other benefit such as low cost, easy operated and high strength.