Review of the State of Impurity Occurrences and Impurity Removal Technology in Phosphogypsum

A variety of co-existing impurities in phosphogypsum limit its large-scale and high-value utilization. This paper summarizes the common contents of major impurity components (silicon and phosphorus) and trace impurity components (fluorine, iron, aluminum, and carbon) in phosphogypsum and discusses t...

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Published inMaterials Vol. 16; no. 16; p. 5630
Main Authors Li, Xu, Lv, Xinfeng, Xiang, Lan
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.08.2023
MDPI
Subjects
Aluminum
Calcium sulfate
Carbon
Cement
Fluorine
Fluorine compounds
Gypsum
harmless
Heavy metals
impurities
Minerals
occurrence state
phosphate fertilizer
Phosphogypsum
Phosphorus
Potassium
Quartz
Review
Silicon
Sodium
Spectrum analysis
Trace elements
Trace impurities
China
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Summary:A variety of co-existing impurities in phosphogypsum limit its large-scale and high-value utilization. This paper summarizes the common contents of major impurity components (silicon and phosphorus) and trace impurity components (fluorine, iron, aluminum, and carbon) in phosphogypsum and discusses the harm of impurity components to the comprehensive utilization of harmless phosphogypsum chemical resources. The occurrence status of impurity components in phosphogypsum and the research progress of various impurity removal technologies are summarized, and the effects of these impurity removal technologies on different contents of impurity components are evaluated. On this basis, the goal of improving the whiteness of phosphogypsum samples and the development of technology for further removal of impurities in phosphogypsum to improve the purity of the main content of calcium sulfate are speculated.
Bibliography:ObjectType-Article-2
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These authors contributed equally to this work.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma16165630