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

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	Calcium sulfate whisker prepared by flue gas desulfurization gypsum: A physical–chemical coupling production process
	Gao Jing 1; Li Qiang 1; Liu Fuli 2
	2020
Source Publication	Chinese Journal of Chemical Engineering
ISSN	1004-9541
Volume	28 Issue:8 Pages:2221
Abstract	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 prospects. Calcium 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 developed. Through the comparison of product morphology, the best grinding time was determined to be 3.5?h. The mechanism of desulfurization gypsum through physical–chemical coupling to reduce energy consumption was clarified. The 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 rate. By calculating the conversion and crystallization rate of calcium sulfate whiskers, it was found that there were obvious “autocatalytic” kinetic characteristics during the crystallization process.
Keyword	Flue gas desulfurization gypsum Calcium sulfate whiskers Crystallization kinetic Physical–chemical coupling
Language	英语
Document Type	期刊论文
Identifier	http://ir.ipe.ac.cn/handle/122111/47550
Collection	中国科学院过程工程研究所
Affiliation	1.辽宁工程技术大学 2.中国科学院过程工程研究所
Recommended Citation GB/T 7714	Gao Jing,Li Qiang,Liu Fuli. Calcium sulfate whisker prepared by flue gas desulfurization gypsum: A physical–chemical coupling production process[J]. Chinese Journal of Chemical Engineering,2020,28(8):2221.
APA	Gao Jing,Li Qiang,&Liu Fuli.(2020).Calcium sulfate whisker prepared by flue gas desulfurization gypsum: A physical–chemical coupling production process.Chinese Journal of Chemical Engineering,28(8),2221.
MLA	Gao Jing,et al."Calcium sulfate whisker prepared by flue gas desulfurization gypsum: A physical–chemical coupling production process".Chinese Journal of Chemical Engineering 28.8(2020):2221.

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