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A platform for research: civil engineering, architecture and urbanism
Phosphorus anhydrite and preparation method thereof
The invention discloses phosphorus anhydrite and a preparation method thereof, and belongs to the technical field of gypsum building materials. The preparation method provided by the invention comprises the following steps: uniformly mixing ardealite, quick lime and water, and aging to obtain pretreated ardealite; and uniformly mixing the pretreated phosphogypsum and graphite powder, heating to 500-550 DEG C, and calcining to obtain the phosphogypsum-graphite composite material. According to the preparation method of the phosphorus anhydrite, the anhydrite which is high in whiteness and free of harmful impurities can be obtained at the low calcination temperature of 500-550 DEG C, the whiteness can reach 0.7 or above, production energy consumption is greatly reduced, and the reaction basic activity of the product can be effectively improved; the phosphogypsum is pretreated by adopting a method of neutralizing and aging wet doped lime, soluble fluorine and phosphorus can be effectively removed, the removal process is simple, the energy consumption is very low, drying treatment is not needed, the preparation cost is low, and new sewage and waste are not generated in the preparation process.
本发明公开了一种磷无水硬石膏及其制备方法，属于石膏建材技术领域。本发明提供的制备方法包括如下步骤：将磷石膏、生石灰和水拌合均匀，陈化，得到预处理磷石膏；将预处理磷石膏和石墨粉混匀后升温至500～550℃进行煅烧，即得。本发明所提供的磷无水硬石膏的制备方法能够在500～550℃的低煅烧温度下获得高白度、无有害杂质的无水硬石膏，白度可高达0.7以上，不仅大幅降低了生产能耗，而且能有效提高产品反应基础活性；本发明采用湿掺石灰中和+陈化的方法对磷石膏进行预处理，能够有效去除可溶氟磷，去除工艺简单，能耗非常低，无需进行烘干处理，制备成本低，并且制备过程不产生新的污废。
Phosphorus anhydrite and preparation method thereof
The invention discloses phosphorus anhydrite and a preparation method thereof, and belongs to the technical field of gypsum building materials. The preparation method provided by the invention comprises the following steps: uniformly mixing ardealite, quick lime and water, and aging to obtain pretreated ardealite; and uniformly mixing the pretreated phosphogypsum and graphite powder, heating to 500-550 DEG C, and calcining to obtain the phosphogypsum-graphite composite material. According to the preparation method of the phosphorus anhydrite, the anhydrite which is high in whiteness and free of harmful impurities can be obtained at the low calcination temperature of 500-550 DEG C, the whiteness can reach 0.7 or above, production energy consumption is greatly reduced, and the reaction basic activity of the product can be effectively improved; the phosphogypsum is pretreated by adopting a method of neutralizing and aging wet doped lime, soluble fluorine and phosphorus can be effectively removed, the removal process is simple, the energy consumption is very low, drying treatment is not needed, the preparation cost is low, and new sewage and waste are not generated in the preparation process.
本发明公开了一种磷无水硬石膏及其制备方法，属于石膏建材技术领域。本发明提供的制备方法包括如下步骤：将磷石膏、生石灰和水拌合均匀，陈化，得到预处理磷石膏；将预处理磷石膏和石墨粉混匀后升温至500～550℃进行煅烧，即得。本发明所提供的磷无水硬石膏的制备方法能够在500～550℃的低煅烧温度下获得高白度、无有害杂质的无水硬石膏，白度可高达0.7以上，不仅大幅降低了生产能耗，而且能有效提高产品反应基础活性；本发明采用湿掺石灰中和+陈化的方法对磷石膏进行预处理，能够有效去除可溶氟磷，去除工艺简单，能耗非常低，无需进行烘干处理，制备成本低，并且制备过程不产生新的污废。
Phosphorus anhydrite and preparation method thereof
一种磷无水硬石膏及其制备方法
FENG SHUXIA (author) / DUAN GUANGBIN (author) / DING YANBO (author) / ZHANG XIUZHI (author)
2024-10-01
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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