Preparation of α High-Strength Gypsum from FGD Gypsum by Autoclaved Semi-Dry Process

Ying Li; Peng Xuan Duan; Yuan Chao Miao; Qing Li

doi:10.4028/www.scientific.net/AMR.1051.230

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 1051Preparation of α High-Strength Gypsum from FGD...

Preparation of α High-Strength Gypsum from FGD Gypsum by Autoclaved Semi-Dry Process

Abstract:

This paper introduced the characteristics of α high-strength gypsum preparation from FGD gypsum by autoclaved semi-dry process. The compositions of the product in different stages of the reaction and the effects of crystal modifiers on the morphology of the α-HH crystals were examined and compared. The properties of α-HH and the feature of hydration products of α-HH were investigated. The results indicated that the α-HH crystals were well-shaped with the aspect ratio of 1 and the compressive strength of the α-HH could reach or exceed 60MPa. In the new process, the reaction time could be significantly shortened to 2.5hrs, which was much shorter than the conventional process. This process could be widely applied to prepare α high-strength gypsum with phosphogypsum, citric acid gypsum, etc.

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Periodical:

Advanced Materials Research (Volume 1051)

Pages:

230-236

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1051.230

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Online since:

October 2014

Authors:

Ying Li*, Peng Xuan Duan, Yuan Chao Miao, Qing Li

Keywords:

Autoclaved Semi-Dry Process, Flue Gas Desulfurization Gypsum, α High-Strength Gypsum

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* - Corresponding Author

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