预处理对磷石膏制备α-半水石膏的影响  

Effect of Pretreatment on Preparation ofα-hemihydrate Gypsum from Phosphogypsum

作　　者：陈勇 张欢 李楠 唐永波 CHEN Yong;ZHANG Huan;LI Nan;TANG Yongbo(Jiangsu Xinyang New Materials Co.,Ltd.,Jiangsu Yangzhou 225000;Institute of Technical Information for Building Materials Industry,Beijing 100000;Technical Supervision and Research Center for Building Materials Industry,Beijing 100000;Jiangsu Yifu Technology Co.,Ltd.,Jiangsu Nanjing 211178,China)

机构地区：[1]江苏新扬新材料股份有限公司,江苏扬州225000 [2]建筑材料工业技术情报研究所,北京100000 [3]建筑材料工业技术监督研究中心,北京100000 [4]江苏一夫科技股份有限公司,江苏南京211178

出　　处：《广州化工》2024年第19期65-67,共3页GuangZhou Chemical Industry

摘　　要：对磷石膏原料做不同的预处理,利用动态水热法制备α-半水石膏,通过表征试样的微观晶体形貌、XRD以及宏观抗压强度特性,探索预处理对磷石膏制备α半水石膏的影响。结果表明,利用动态水热法制备α-半水石膏的时候,预处理更加有利于磷石膏制备α半水石膏,且采用碱处理的方式,更加容易制备短柱状的α半水石膏晶体,但是碱性过高,制备出来的α半水石膏水化后的力学性能会有所下降。Different pre-treatments were applied to the raw materials of phosphogypsum,andα-hemihydrate gypsum was prepared by dynamic hydrothermal method.The effect of pretreatment on the preparation ofα-hemihydrate gypsum from phosphogypsum through the microstructure of the sample,XRD and compressive strength characteristics were explored.The results showed that when using dynamic hydrothermal method to prepareα-hemihydrate gypsum,pretreatment was more conducive to the preparation ofα-hemihydrate gypsum from phosphogypsum,and using alkaline treatment made it easier to prepare short columnarα-hemihydrate gypsum crystals.However,if the alkalinity was too high,the mechanical properties of the preparedα-hemihydrate gypsum after hydration will decrease.

关 键 词：磷石膏 Α-半水石膏 转晶剂 固废利用 预处理 

分 类 号：TQ177.37[化学工程—硅酸盐工业]