低pH磷石膏流态化煅烧生产建筑石膏  

Production of building gypsum by fluidized calcination of low pH phosphogypsum

作　　者：张建国 郭旭东 钟晋 刘海 ZHANG Jianguo;GUO Xudong;ZHONG Jin;LIU Hai(Yunnan Yuntianhua Environmental Protection Technology Co.,Ltd.,Kunming 650000,China)

机构地区：[1]云南云天化环保科技有限公司,云南昆明650000

出　　处：《磷肥与复肥》2024年第3期13-15,共3页Phosphate & Compound Fertilizer

摘　　要：当前磷石膏制备建筑石膏均要求原料磷石膏pH≥4.5。以45万t/a磷石膏流态化煅烧制备建筑石膏/Ⅱ型无水石膏柔性生产装置为平台,开展低p H磷石膏中温闪烧除杂、袋装陈化处理试验,探究其工业化应用的可行性。结果表明,pH 3.5~4.0的磷石膏煅烧所得产品2 h抗折强度达到2.0 MPa以上,满足手工砌块产品质量要求。At present,the production of building gypsum from phosphogypsum requires the pH of raw material to be more than 4.5.Using 450 kt/a building gypsum/typeⅡanhydrous gypsum flexible production plant by fluidized calcination of phosphogypsum as a platform,experiments are conducted on low pH phosphogypsum with medium temperature flash firing for impurity removal and bagging for aging treatment,exploring its feasibility in industrial application.The results show that the 2 hours flexural strength of product reaches over 2.0 MPa using phosphogypsum with pH of 3.5-4.0,meeting the quality requirements of handmade block products.

关 键 词：低pH磷石膏 流态化煅烧 中温闪烧 陈化 建筑石膏 工业化生产 

分 类 号：X781[环境科学与工程—环境工程]