Title: Preparation of Large-grained anhydrite(VI) γ-CaSO<sub>4</sub> with FGD gypsum
Abstract: Large-grained anhydrite(VI) γ-CaO4 was prepared in autoclave method by using flue-gas desulfurization gypsum as materials. The influence of slurry concentration, succinic acid and sodium chloride content, reaction temperature, reaction time, pH value, 1,4-butanediol was investigated. The research shows that large-grained anhydrite(VI) γ-CaSO4 with length of 120 μm and length–diameter ratio of 1, dry compressive strength of which is similar to α40 grade, was obtained at slurry concentration of 18 wt%, succinic acid of 0.02 wt%, NaCl content of 3.0 wt%, 1,4-butanediol of 0.712 wt% after three times washing under 120°C without change of pH value. After five times circulation of mother liquid, the morphology and performance of product had no significant difference with initial product.
Publication Year: 2019
Publication Date: 2019-04-17
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 2
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