Effects of AlCl3 on the Crystal Morphology of Calcium Sulfate Whisker Prepared from FGD Gypsum

6th Annual International Conference on Material Science and Environmental Engineering

材料科学;生态环境科学

Wang, Xiao^1 ; Jin, Biao^1 ; Xu, Zhuoyue^1 ; Zhang, Xiaoting^1 ; Liu, Xueping^1 ; Yang, Liushuan^1^2

Department of Chemical and Material Engineering, Henan University of Urban Construction, Pingdingshan, Henan Province

467036, China^1

School of Materials Science and Engineering, Henan University of Science and Technology, Henan Province, Luoyang

471003, China^2

关键词: Calcium sulfate hemihydrate;    Calcium sulfate whiskers;    Crystal modifiers;    Crystal morphologies;    FGD gypsum;    Flue gas desulfurization(FGD);    Hydrothermal methods;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/472/1/012005/pdf
DOI  :  10.1088/1757-899X/472/1/012005

来源: IOP

【 摘 要 】

Utilizing the purified flue gas desulfurization (FGD) gypsum as raw material and AlCl3 as crystal modifier to prepare calcium sulfate whiskers (CSWs) by hydrothermal method, the effects of the AlCl3 concentration and the pH of reaction slurry on the crystal morphology of CSW were discussed. The results show that the AlCl3 concentration and the pH of reaction slurry had a significant effect on the crystal morphology of CSWs. CSWs grown in the AlCl3-H2O slurry had diameters ranging from 2 to 6 um and aspect ratio above 80 μm, and their phase structure was calcium sulfate hemihydrate (HH).