Progress in preparation of α-hemihydrous gypsum from phosphogypsum and its application
With the continuous development of phosphorus chemical industry in our country,the discharge amount of phospho-gypsum(PG)produced in our country is increasing year by year,and the stockpile is huge,which seriously endangers the ecological environment.How to treat and utilize phosphogypsum efficiently is an urgent problem.Phosphogypsum is transformed into α-HH,which has a unique advantage in the preparation of high strength gypsum and gypsum whisker.This thesis briefly discusses the related research of phosphogypsum α-hemihydrous gypsum(α-PHH)prepared by phosphogypsum,and analyzes the green application field and development trend of α-PHH,so as to provide some reference for improving the technical level of phosphogypsum utiliza-tion,increasing its added value and expanding the application space.
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