Gallium Leaching from Fly Ash A Mini-Review

Authors

  • Bagdaulet Kenzhaliyev Institute of Metallurgy and Ore Beneficiation JSC, Satbayev University, Almaty, Kazakhstan
  • Ainur Berkinbayeva Institute of Metallurgy and Ore Beneficiation JSC, Satbayev University, Almaty, Kazakhstan
  • Kenzhegali Smailov Institute of Metallurgy and Ore Beneficiation JSC, Satbayev University, Almaty, Kazakhstan
  • Diana Karim The Institute of Metallurgy and Ore Beneficiation, Satbayev University
  • Olga Atanova Institute of Metallurgy and Ore Beneficiation JSC, Satbayev University, Almaty, Kazakhstan
  • Shynar Saulebekkyzy Institute of Metallurgy and Ore Beneficiation JSC, Satbayev University, Almaty, Kazakhstan
  • Nazerke Tolegenova Institute of Metallurgy and Ore Beneficiation JSC, Satbayev University, Almaty, Kazakhstan
  • Azamat Yessengaziyev Institute of Metallurgy and Ore Beneficiation JSC, Satbayev University, Almaty, Kazakhstan
  • Gulnur Abikenova ERG Research and Development, Almaty, Kazakhstan
  • Yerkem Birlikzhan Institute of Metallurgy and Ore Beneficiation JSC, Satbayev University, Almaty, Kazakhstan

DOI:

https://doi.org/10.36547/ams.32.2.2274

Keywords:

gallium (Ga), coal, aluminosilicates, isomorphic substitution, sequential leaching, thermal pretreatment

Abstract

Gallium (Ga) occurrence in coal is interpreted only by coupling bulk partitioning with microscale residence. Ga distribution reflects allocation between inorganic matter and organics and links to ash yield. Al-bearing aluminosilicates dominate as hosts, with Ga retained mainly by isomorphic substitution governed by crystal chemistry rather than adsorption. Workflows compare where Ga sits versus how it is bound: density fractionation and sequential/selective leaching, constrained by XRD and supported by BSE–EDS, EMPA, and LA–ICP–MS. During combustion, Ga concentrates in fly ash/slag; recovery relies on pretreatment, acid leaching, and sorption/stripping, with calcination/roasting disrupting refractory frameworks, boosting extraction, and controlling impurity co-dissolution.

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Published

2026-06-28

How to Cite

Kenzhaliyev, B., Berkinbayeva, A., Smailov, K., Karim, D., Atanova, O., Saulebekkyzy, S., … Birlikzhan, Y. (2026). Gallium Leaching from Fly Ash A Mini-Review. Acta Metallurgica Slovaca, 32(2), 69–73. https://doi.org/10.36547/ams.32.2.2274

Issue

Vol. 32 No. 2 (2026): Acta Metallurgica Slovaca

Section

Research papers

License

Copyright (c) 2026 Bagdaulet Kenzhaliyev, Ainur Berkinbayeva, Kenzhegali Smailov, Diana Karim, Olga Atanova, Shynar Saulebekkyzy, Nazerke Tolegenova, Azamat Yessengaziyev, Gulnur Abikenova, Yerkem Birlikzhan

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

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