Calcium sulfate whisker prepared by flue gas desulfurization gypsum:A physical–chemical coupling production process

作     者：Jing Gao Qiang Li Fuli Liu Jing Gao;Qiang Li;Fuli Liu

作者机构：College of MiningLiaoning Technical UniversityFuxin 123000China CAS Key Laboratory of Green Process and EngineeringInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China College of Chemical and Environmental EngineeringChina University of Mining and TechnologyBeijing 100083China 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2020年第28卷第8期

页      面：2221-2226页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 081702[工学-化学工艺] 07[理学] 070205[理学-凝聚态物理] 08[工学] 0817[工学-化学工程与技术] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 

基　　金：supported by the State Key Laboratory of Mineral Processing Science and Technology Open Fund(BGRIMM-KJSKL-2017-16) Liaoning Provincial Department of Education Youth Project(LJ2017QL028) Coal Resource Safety Mining and Clean Utilization Engineering Research Center Open Fund(LNTU15KF18) 

主　　题：Flue gas desulfurization gypsum Calcium sulfate whiskers Crystallization kinetic Physical–chemical coupling 

摘      要：In this paper,the solid waste desulfurization gypsum produced by coal-fired power plants was used as a raw material to prepare calcium sulfate whiskers with high application *** sulfate whiskers with uniform morphology and high aspect ratio can be prepared by hydrothermal method in sulfuric acid solution.A new process of desulfurization gypsum activated by high-energy grinding to reduce the reaction temperature and sulfuric acid concentration was *** the comparison of product morphology,the best grinding time was determined to be 3.5 *** mechanism of desulfurization gypsum through physical–chemical coupling to reduce energy consumption was *** activation of desulfurization gypsum by grinding and the acidic environment provided by the sulfuric acid solution made the calcium sulfate solution reached rapid saturation and accelerated the nucleation *** calculating the conversion and crystallization rate of calcium sulfate whiskers,it was found that there were obviousautocatalytickinetic characteristics during the crystallization process.