Recovery of metals and other beneficial products f

Authors: Prafulla Kumar Sahoo Kangjoo Kim M A Powell Sk Md Equeenuddin

Publish Date: 2016/08/19

Volume: 3, Issue: 3, Pages: 267-283

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Abstract

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

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