An overview of metals recovery from thermal power plant solid wastes

Meawad, Amr; Bojinova, D.; Pelovski, Y.

doi:10.1016/j.wasman.2010.07.010

Cited by 111 publications

(45 citation statements)

References 124 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…If valuable elements present in coal concentrate in the coal ash and reach the industrial cut-off grade, it is essential to consider their beneficial recovery as a by-product from coal combustion residues. Based on a review of a number of methods for recovery of metals from power plant solid wastes, Meawad et al [24] believed that the solid wastes are actually a secondary resource of metals, and by applying mineral processing technologies and hydrometallurgical and biohydrometallurgical processes, it is possible to recover metals such as Al, Ga, Ge and V, from power plant solid wastes. As for Au, it also has been shown that economically efficient Au recovery from the wastes of the Reftinsk power plant in the Urals is conducted with an average Au grade of 0.1-0.2 lg/g in coal combustion products [4].…”

Section: The Industrial Cut-off Grade Of Au and Ga In Coalmentioning

confidence: 99%

A cut-off grade for gold and gallium in coal

Wang

Sang

Hao

et al. 2015

Fuel

View full text Add to dashboard Cite

Section: The Industrial Cut-off Grade Of Au and Ga In Coalmentioning

confidence: 99%

A cut-off grade for gold and gallium in coal

Wang

Sang

Hao

et al. 2015

Fuel

View full text Add to dashboard Cite

“…CFA can cause serious dust pollution [1], and the toxic elements contained in CFA can leach into soil and cause serious secondary pollution [2][3][4]. Millions of tonnes of CFA, containing high proportions of aluminum and lithium, are released each year from coal-fired power stations in the Inner Mongolia, Ningxia, and Shanxi provinces in northern China [5][6][7][8], which is illustrated in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

An Efficient Approach for Lithium and Aluminum Recovery from Coal Fly Ash by Pre-Desilication and Intensified Acid Leaching Processes

Qin

Kang

et al. 2017

Metals

View full text Add to dashboard Cite

A novel technique was developed for the recovery of lithium and aluminum from coal fly ash using a combination of pre-desilication and an intensified acid leaching process. The main components of the high-aluminum fly ash were found to be Al 2 O 3 and SiO 2 , and the Al/Si ratio increased from 1.0 to 1.5 after desiliconization. The lithium content of the coal fly ash met national recycling standards. The optimal acid leaching conditions, under which the leaching efficiencies of lithium and aluminum were 82.23% and 76.72%, respectively, were as follows: 6 mol/L HCl, 1:20 solid to liquid ratio, 120 • C and 4 h. During the hydrochloric acid pressure leaching process, spherical particles of desilicated fly ash were decomposed into flakes. Part of the mullite phase was dissolved, and most of the glass phase leached into the liquor. The generation of the silicates hindered lithium transport, which decreased the leaching rate of lithium. This work suggests that the preprocessing is a promising option for effective recovery of high-aluminum and fly ash-associated lithium.

show abstract

“…Fly ash has wide application in many products and industries (Dirk, 1996;Queralt et al, 1997;Moreno et al, 2002;Meawad et al, 2010). Nevertheless, the utilization rate of coal fly ash remains low in China; a large portion of fly ash ends up landfills and has created detrimental environmental impacts (Fu, 2010;Stant, 2010).…”

Section: Introductionmentioning

confidence: 99%

Content and Distribution of Trace Elements and Polycyclic Aromatic Hydrocarbons in Fly Ash from a Coal-Fired CHP Plant

Liu

Cao

2014

Aerosol Air Qual. Res.

View full text Add to dashboard Cite

The levels of trace elements and polycyclic aromatic hydrocarbons (PAHs) in fly ash generated by coal combustion have received considerable attention in recent years, due to their potential environmental impact. Sixteen high priority PAHs and 14 trace elements in coal fly ash were measured. The particle sizes of fly ash showed a bimodal distribution, and most ash particles were within a range of 20-25 µm in diameter. The fly ash exhibited high contents of CaO and SO 3 , which was influenced by the desulfidation treatment of limestone. The Be, Cu, Ni, V, Se, Mo and Cd contents increased significantly with decreasing particle sizes of fly ash, while those of Zn and Pb showed no obvious trends. PAHs with three-and four-rings were the dominate species in all the fly ash. The amount low molecular weight PAHs with two-, three-and four-rings was inversely correlated with the particle sizes of the fly ash.

show abstract

An overview of metals recovery from thermal power plant solid wastes

Cited by 111 publications

References 124 publications

A cut-off grade for gold and gallium in coal

A cut-off grade for gold and gallium in coal

An Efficient Approach for Lithium and Aluminum Recovery from Coal Fly Ash by Pre-Desilication and Intensified Acid Leaching Processes

Content and Distribution of Trace Elements and Polycyclic Aromatic Hydrocarbons in Fly Ash from a Coal-Fired CHP Plant

Contact Info

Product

Resources

About