脱硫石膏转化为半水石膏的过程及机理  

Preparation and Mechanism of Hemihydrate Gypsum with FGD Gypsum

作　　者：龚小梅[1] 宾晓蓓[1] 杨少博[2] 王培雄 覃丽娟 薛俊[2] 曹宏[2] 

机构地区：[1]武汉理工大学资源与环境工程学院,武汉430070 [2]武汉工程大学材料科学与工程学院,武汉430073 [3]湖北永业行评估咨询有限公司,武汉430062 [4]湖北三江航天红林探控有限公司,孝感432000

出　　处：《硅酸盐通报》2015年第9期2491-2495,共5页Bulletin of the Chinese Ceramic Society

基　　金：国家科技支撑计划项目(2013BAB07B05);湖北省自然科学基金项目(2014CFB788)

摘　　要：以脱硫石膏为原料,α-半水石膏与β-半水石膏分别采用蒸压法和煅烧法制得。讨论α-半水石膏的工艺条件,并结合XRD与SEM初步探讨α-半水石膏与β-半水石膏的形成机理。结果表明在α-半水石膏的形成机制是溶解-析晶,β-半水石膏是二水石膏直接脱水。α-hemihydrate gypsum and β-hemihydrate gypsum were prepared by steam pressure method and calcination respectively with the FGD gypsum as raw materials. The technological conditions of preparation of α-hemihydrate gypsum were discussed. Furthermore, the formation mechanism of hemihydrate gypsum were also studied by X-ray diffraction and SEM photos. The result indicated that the formation mechanism of α-hemihydrate gypsum was dissolution-crystalization, while β-hemihydrate gypsum was dehydrated directly.

关 键 词：脱硫石膏 Α-半水石膏 β-半水石膏 形成机理 

分 类 号：TD98[矿业工程—选矿]