Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Method for preparing high-strength building gypsum by dry method
The invention relates to a method for preparing high-strength building gypsum by a dry method, and belongs to the technical field of industrial solid waste recycling and building material application. After the PH value of phosphogypsum is adjusted by lime powder, a crystal modifier and a coupling agent are added for dispersing, preheating, crystal transforming, exhausting, drying, aging and grinding to obtain the high-strength building gypsum. According to the invention, water washing is not needed, only lime is used for adjusting the pH value of the phosphogypsum, the problems of waste of water resources and difficult recycling of washing liquor are avoided, and the method meets the requirements of the level 3.0 of the national standard of GB/T 9776-2008 building gypsum.
本发明涉及一种干法制备高强建筑石膏的方法，属于工业固体废弃物资源化利用和建筑材料应用技术领域。磷石膏经石灰粉调节PH值后，加入转晶剂和偶联剂进行分散、预热、转晶、排气、干燥、陈化、粉磨制得高强建筑石膏。本发明不需要经过水洗，仅用石灰调整磷石膏pH即可，避免了水资源的浪费和洗液难以回收利用问题，并且符合《GB/T 9776‑2008建筑石膏》国家标准3.0级要求。
Method for preparing high-strength building gypsum by dry method
The invention relates to a method for preparing high-strength building gypsum by a dry method, and belongs to the technical field of industrial solid waste recycling and building material application. After the PH value of phosphogypsum is adjusted by lime powder, a crystal modifier and a coupling agent are added for dispersing, preheating, crystal transforming, exhausting, drying, aging and grinding to obtain the high-strength building gypsum. According to the invention, water washing is not needed, only lime is used for adjusting the pH value of the phosphogypsum, the problems of waste of water resources and difficult recycling of washing liquor are avoided, and the method meets the requirements of the level 3.0 of the national standard of GB/T 9776-2008 building gypsum.
本发明涉及一种干法制备高强建筑石膏的方法，属于工业固体废弃物资源化利用和建筑材料应用技术领域。磷石膏经石灰粉调节PH值后，加入转晶剂和偶联剂进行分散、预热、转晶、排气、干燥、陈化、粉磨制得高强建筑石膏。本发明不需要经过水洗，仅用石灰调整磷石膏pH即可，避免了水资源的浪费和洗液难以回收利用问题，并且符合《GB/T 9776‑2008建筑石膏》国家标准3.0级要求。
Method for preparing high-strength building gypsum by dry method
一种干法制备高强建筑石膏的方法
ZHANG YICANG (Autor:in) / XIA JUPEI (Autor:in)
08.10.2021
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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