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

Jing Gao; Qiang Li; Fuli Liu

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

Materials and Product Engineering | Updated：2026-01-06

- Calcium sulfate whisker prepared by flue gas desulfurization gypsum: A physical-chemical coupling production process
- Calcium sulfate whisker prepared by flue gas desulfurization gypsum: A physical-chemical coupling production process
- 中国化学工程学报（英文版） 2020年28卷第8期页码：2221-2226
- Affiliations：
  
  1. College of Mining, Liaoning Technical University,Fuxin,China,123000
  2. CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences,Beijing,China,100190
  3. College of Chemical and Environmental Engineering, China University of Mining and Technology,Beijing,China,100083
- Author bio：
- Funds：
- DOI：
  中图分类号：
- 纸质出版：2020
- Accepted：
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Jing Gao, Qiang Li, Fuli Liu. Calcium sulfate whisker prepared by flue gas desulfurization gypsum: A physical-chemical coupling production process[J]. 中国化学工程学报（英文版）, 2020,28(8):2221-2226.

Jing Gao, Qiang Li, Fuli Liu. Calcium sulfate whisker prepared by flue gas desulfurization gypsum: A physical-chemical coupling production process[J]. Chinese Journal of Chemical Engineering, 2020, 28(8): 2221-2226.
Jing Gao, Qiang Li, Fuli Liu. Calcium sulfate whisker prepared by flue gas desulfurization gypsum: A physical-chemical coupling production process[J]. 中国化学工程学报（英文版）, 2020,28(8):2221-2226. DOI：

Jing Gao, Qiang Li, Fuli Liu. Calcium sulfate whisker prepared by flue gas desulfurization gypsum: A physical-chemical coupling production process[J]. Chinese Journal of Chemical Engineering, 2020, 28(8): 2221-2226. DOI：

摘要

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.

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