磷石膏基建筑石膏粉的制备工艺及其缓凝性能研究  

Study on the preparation technology of phosphogypsum-based building gypsum powder and its retardation performance

作　　者：张振环 马航 万邦隆 杨晓龙 ZHANG Zhenhuan;MA Hang;WAN Banglong;YANG Xiaolong(R&D Center,Yunnan Yantianhua Co.,Ltd.,Kunming 650228,China)

机构地区：[1]云南云天化股份有限公司研发中心,云南昆明650228

出　　处：《磷肥与复肥》2021年第9期22-24,共3页Phosphate & Compound Fertilizer

摘　　要：以磷石膏为基材,通过在不同温度下煅烧制备建筑石膏粉,优化制备工艺并对其缓凝性能进行研究。结果表明,磷石膏制备建筑石膏粉最佳工艺为煅烧温度250℃,反应时间1 h;在此工艺条件下制备的建筑石膏粉各项指标符合GB/T 9776-2008要求;Sg-01蛋白类缓凝剂对石膏建筑粉的缓凝效果最佳,可满足施工要求,且对石膏强度损失率最低。Building gypsum powder is prepared from phosphogypsum substrate at different calcination temperatures, its process is optimized and its retarding experiment is studied. The results show that the best process for preparing phosphogypsum-based building gypsum from phosphogypsum is calcination temperature of250 ℃ and reaction time of 1 h;The indexes of building gypsum powder prepared under this process condition meet the requirements of GB/T 9776-2008;The retarding effect of sg-01 protein retarder on building gypsum is the best, which can meet the construction requirements, and the loss rate of gypsum strength is the lowest.

关 键 词：磷石膏 建筑石膏 缓凝 

分 类 号：X781[环境科学与工程—环境工程]