Recovery of metals and other beneficial products from coal fly ash： a sustainable approach for fly ash management

Increasing production and disposal of coal fly ash （CFA） is a matter of serious environment concern. However, CFA contains various beneficial metals and mineral matters whose demand is increasing in the industrialized world, while natural supplies are diminishing. Therefore, recovery of these potent...

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Bibliographic Details
Published inInternational journal of coal science & technology Vol. 3; no. 3; pp. 267 - 283
Main Authors Sahoo, Prafulla Kumar, Kim, Kangjoo, Powell, M. A., Equeenuddin, Sk Md
Format Journal Article
LanguageEnglish
Published Beijing China Coal Society 01.09.2016
Springer Nature B.V
Subjects
CFA
Energy
Fly ash
Fossil Fuels (incl. Carbon Capture)
Geotechnical Engineering & Applied Earth Sciences
Mineral Resources
Rare earth elements
Review
Trace elements
产品
回收金属
微量元素
环境问题
矿产资源
管理
粉煤灰
Coal fly ash
Beneficial elements
Extraction efficiency
Hydrometallurgical methods
Recovery
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Summary:Increasing production and disposal of coal fly ash （CFA） is a matter of serious environment concern. However, CFA contains various beneficial metals and mineral matters whose demand is increasing in the industrialized world, while natural supplies are diminishing. Therefore, recovery of these potential resources from CFA can be an alternative way to save mineral resources, as well as to reduce the environmental burden of CFA disposal. There are numerous methods developed for the recovery of beneficial products from CFA. Based on the US patents and journal literatures, the present review describes the recovery status and technologies of major elements such as Al, Si, Fe and Ti, and trace elements such as V, Ga, Ge, Se, Li, Mo, U, Au, Ag, Pt groups and rare earth elements （REEs） and other beneficial products such as magnetic materials, cenospheres, and unburned carbon from CFA. It also highlights the recovery efficiency and drawbacks for their extraction, and suggests future research to develop satisfactory results in terms of selective recovery and purification.
Bibliography:Coal fly ash ; Beneficial elements ; Recovery ; Hydrometallurgical methods ; Extraction efficiency
Increasing production and disposal of coal fly ash （CFA） is a matter of serious environment concern. However, CFA contains various beneficial metals and mineral matters whose demand is increasing in the industrialized world, while natural supplies are diminishing. Therefore, recovery of these potential resources from CFA can be an alternative way to save mineral resources, as well as to reduce the environmental burden of CFA disposal. There are numerous methods developed for the recovery of beneficial products from CFA. Based on the US patents and journal literatures, the present review describes the recovery status and technologies of major elements such as Al, Si, Fe and Ti, and trace elements such as V, Ga, Ge, Se, Li, Mo, U, Au, Ag, Pt groups and rare earth elements （REEs） and other beneficial products such as magnetic materials, cenospheres, and unburned carbon from CFA. It also highlights the recovery efficiency and drawbacks for their extraction, and suggests future research to develop satisfactory results in terms of selective recovery and purification.
10-1252/TD
ISSN:2095-8293
2198-7823
DOI:10.1007/s40789-016-0141-2