Distribution and occurrence of lithium in high-alumina-coal fly ash

Pengpeng Hu, Xinjuan Hou, Jianbo Zhang, Shaopeng Li, Hao Wu, Anne Juul Damø, Huiquan Li*, Qisheng Wu, Xinguo Xi

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

High-alumina-coal fly ash (HAFA) with a high Li content is regarded as a potential resource for Li production. To support the development of Li recovery technology from HAFA, the distribution and modes of occurrence of Li in HAFA were investigated. HAFA was separated into magnetic particles, glass, and mullite+corundum+quartz (MCQ) using an acid-alkali combination method. 79–94% of the Li was found in glass, with the remaining 5–16% and <5% of Li in MCQ and magnetic particles, respectively. Chemical state imaging of Li in HAFA, magnetic particles, and MCQ was obtained using time-of-flight secondary ion mass spectrometry (TOF-SIMS). Lithium was found to be relatively uniformly distributed in the HAFA particles and strongly correlated with Al and Si. Possible formation pathways of Li in the glass phase were proposed. The energy differences between reactants and products (∆E) calculated using the generalized gradient approximation (GGA) method indicated that Li occurred in Q3(0Al) and Q3(1Al) structures by reacting with Q4(0Al) and Q4(1Al). Based on the experimental and simulation results, we propose extracting Li during the pre-desilication process by dissolving the glass phase.
Original languageEnglish
JournalInternational Journal of Coal Geology
Volume189
Pages (from-to)27-34
ISSN0166-5162
DOIs
Publication statusPublished - 2018

Keywords

  • High-alumina-coal fly ash
  • Lithium
  • Mode of occurrence
  • Molecular simulation
  • TOF-SIMS

Cite this

Hu, Pengpeng ; Hou, Xinjuan ; Zhang, Jianbo ; Li, Shaopeng ; Wu, Hao ; Damø, Anne Juul ; Li, Huiquan ; Wu, Qisheng ; Xi, Xinguo. / Distribution and occurrence of lithium in high-alumina-coal fly ash. In: International Journal of Coal Geology. 2018 ; Vol. 189. pp. 27-34.
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title = "Distribution and occurrence of lithium in high-alumina-coal fly ash",
abstract = "High-alumina-coal fly ash (HAFA) with a high Li content is regarded as a potential resource for Li production. To support the development of Li recovery technology from HAFA, the distribution and modes of occurrence of Li in HAFA were investigated. HAFA was separated into magnetic particles, glass, and mullite+corundum+quartz (MCQ) using an acid-alkali combination method. 79–94{\%} of the Li was found in glass, with the remaining 5–16{\%} and <5{\%} of Li in MCQ and magnetic particles, respectively. Chemical state imaging of Li in HAFA, magnetic particles, and MCQ was obtained using time-of-flight secondary ion mass spectrometry (TOF-SIMS). Lithium was found to be relatively uniformly distributed in the HAFA particles and strongly correlated with Al and Si. Possible formation pathways of Li in the glass phase were proposed. The energy differences between reactants and products (∆E) calculated using the generalized gradient approximation (GGA) method indicated that Li occurred in Q3(0Al) and Q3(1Al) structures by reacting with Q4(0Al) and Q4(1Al). Based on the experimental and simulation results, we propose extracting Li during the pre-desilication process by dissolving the glass phase.",
keywords = "High-alumina-coal fly ash, Lithium, Mode of occurrence, Molecular simulation, TOF-SIMS",
author = "Pengpeng Hu and Xinjuan Hou and Jianbo Zhang and Shaopeng Li and Hao Wu and Dam{\o}, {Anne Juul} and Huiquan Li and Qisheng Wu and Xinguo Xi",
year = "2018",
doi = "10.1016/j.coal.2018.02.011",
language = "English",
volume = "189",
pages = "27--34",
journal = "International Journal of Coal Geology",
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Distribution and occurrence of lithium in high-alumina-coal fly ash. / Hu, Pengpeng; Hou, Xinjuan; Zhang, Jianbo; Li, Shaopeng; Wu, Hao; Damø, Anne Juul; Li, Huiquan; Wu, Qisheng; Xi, Xinguo.

In: International Journal of Coal Geology, Vol. 189, 2018, p. 27-34.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Distribution and occurrence of lithium in high-alumina-coal fly ash

AU - Hu, Pengpeng

AU - Hou, Xinjuan

AU - Zhang, Jianbo

AU - Li, Shaopeng

AU - Wu, Hao

AU - Damø, Anne Juul

AU - Li, Huiquan

AU - Wu, Qisheng

AU - Xi, Xinguo

PY - 2018

Y1 - 2018

N2 - High-alumina-coal fly ash (HAFA) with a high Li content is regarded as a potential resource for Li production. To support the development of Li recovery technology from HAFA, the distribution and modes of occurrence of Li in HAFA were investigated. HAFA was separated into magnetic particles, glass, and mullite+corundum+quartz (MCQ) using an acid-alkali combination method. 79–94% of the Li was found in glass, with the remaining 5–16% and <5% of Li in MCQ and magnetic particles, respectively. Chemical state imaging of Li in HAFA, magnetic particles, and MCQ was obtained using time-of-flight secondary ion mass spectrometry (TOF-SIMS). Lithium was found to be relatively uniformly distributed in the HAFA particles and strongly correlated with Al and Si. Possible formation pathways of Li in the glass phase were proposed. The energy differences between reactants and products (∆E) calculated using the generalized gradient approximation (GGA) method indicated that Li occurred in Q3(0Al) and Q3(1Al) structures by reacting with Q4(0Al) and Q4(1Al). Based on the experimental and simulation results, we propose extracting Li during the pre-desilication process by dissolving the glass phase.

AB - High-alumina-coal fly ash (HAFA) with a high Li content is regarded as a potential resource for Li production. To support the development of Li recovery technology from HAFA, the distribution and modes of occurrence of Li in HAFA were investigated. HAFA was separated into magnetic particles, glass, and mullite+corundum+quartz (MCQ) using an acid-alkali combination method. 79–94% of the Li was found in glass, with the remaining 5–16% and <5% of Li in MCQ and magnetic particles, respectively. Chemical state imaging of Li in HAFA, magnetic particles, and MCQ was obtained using time-of-flight secondary ion mass spectrometry (TOF-SIMS). Lithium was found to be relatively uniformly distributed in the HAFA particles and strongly correlated with Al and Si. Possible formation pathways of Li in the glass phase were proposed. The energy differences between reactants and products (∆E) calculated using the generalized gradient approximation (GGA) method indicated that Li occurred in Q3(0Al) and Q3(1Al) structures by reacting with Q4(0Al) and Q4(1Al). Based on the experimental and simulation results, we propose extracting Li during the pre-desilication process by dissolving the glass phase.

KW - High-alumina-coal fly ash

KW - Lithium

KW - Mode of occurrence

KW - Molecular simulation

KW - TOF-SIMS

U2 - 10.1016/j.coal.2018.02.011

DO - 10.1016/j.coal.2018.02.011

M3 - Journal article

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SP - 27

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JO - International Journal of Coal Geology

JF - International Journal of Coal Geology

SN - 0166-5162

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