Separation of alumina from aluminum-rich coal fly ash using NaOH molten salt calcination and hydrochemical process
Abstract High-alumina coal fly ash (CFA) is considered as an important and cheap resource of aluminum. On account of high valence aluminum often trapped in aluminosilicate basic glassy phase and mullite ($ Al_{6} %$ Si_{2} %$ O_{13} $), efficiently separating aluminum and silicon is an essential pre...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Yang, Jingjie [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2022 |
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| Schlagwörter: |
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| Anmerkung: |
© The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2022 |
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| Übergeordnetes Werk: |
Enthalten in: Clean Products and Processes - Springer-Verlag, 2001, 24(2022), 5 vom: 06. Feb., Seite 1507-1519 |
|---|---|
| Übergeordnetes Werk: |
volume:24 ; year:2022 ; number:5 ; day:06 ; month:02 ; pages:1507-1519 |
| Links: |
|---|
| DOI / URN: |
10.1007/s10098-021-02262-1 |
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SPR047201037 |
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| 520 | |a Abstract High-alumina coal fly ash (CFA) is considered as an important and cheap resource of aluminum. On account of high valence aluminum often trapped in aluminosilicate basic glassy phase and mullite ($ Al_{6} %$ Si_{2} %$ O_{13} $), efficiently separating aluminum and silicon is an essential precondition for maximizing the recycling of alumina from CFA, which is conducive to reducing the environment danger. In this study, a novel process combining alkali calcination and hydrochemical treatment was proposed to efficiently separate aluminum and silicon in CFA. The reactivity of CFA was greatly improved after the calcination treatment. The results show that alumina-rich phase, mullite, was transformed into nepheline ($ NaAlSiO_{4} $) by calcination with NaOH at a mass ratio 0.8:1 ($ w_{NaOH} $:$ w_{CFA} $) and calcination temperatures of 400 °C, which improved the dissolution of aluminum during the hydrochemical process and enriched the silicon in the residue. Then, the influence of the parameters of the hydrochemical process on alumina extraction was investigated. The results indicated that the two-stage method was more efficient than the direct hydrochemical process. The optimum conditions of the hydrochemical process were 40% NaOH solution and heating at 260 °C for 60 min. Approximately 94% of the alumina was easily recovered, whereas most of the silicon was converted to $ NaCaHSiO_{4} $. The combined treatment method highlights the potential for aluminum production from CFA. Graphical abstract | ||
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| 700 | 1 | |a Peng, Tongjiang |4 aut | |
| 700 | 1 | |a Zeng, Li |4 aut | |
| 700 | 1 | |a Chao, Li |4 aut | |
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10.1007/s10098-021-02262-1 doi (DE-627)SPR047201037 (SPR)s10098-021-02262-1-e DE-627 ger DE-627 rakwb eng Yang, Jingjie verfasserin aut Separation of alumina from aluminum-rich coal fly ash using NaOH molten salt calcination and hydrochemical process 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2022 Abstract High-alumina coal fly ash (CFA) is considered as an important and cheap resource of aluminum. On account of high valence aluminum often trapped in aluminosilicate basic glassy phase and mullite ($ Al_{6} %$ Si_{2} %$ O_{13} $), efficiently separating aluminum and silicon is an essential precondition for maximizing the recycling of alumina from CFA, which is conducive to reducing the environment danger. In this study, a novel process combining alkali calcination and hydrochemical treatment was proposed to efficiently separate aluminum and silicon in CFA. The reactivity of CFA was greatly improved after the calcination treatment. The results show that alumina-rich phase, mullite, was transformed into nepheline ($ NaAlSiO_{4} $) by calcination with NaOH at a mass ratio 0.8:1 ($ w_{NaOH} $:$ w_{CFA} $) and calcination temperatures of 400 °C, which improved the dissolution of aluminum during the hydrochemical process and enriched the silicon in the residue. Then, the influence of the parameters of the hydrochemical process on alumina extraction was investigated. The results indicated that the two-stage method was more efficient than the direct hydrochemical process. The optimum conditions of the hydrochemical process were 40% NaOH solution and heating at 260 °C for 60 min. Approximately 94% of the alumina was easily recovered, whereas most of the silicon was converted to $ NaCaHSiO_{4} $. The combined treatment method highlights the potential for aluminum production from CFA. Graphical abstract Coal fly ash (dpeaa)DE-He213 Alumina (dpeaa)DE-He213 Calcination (dpeaa)DE-He213 Hydrothermal treatment (dpeaa)DE-He213 Sun, Hongjuan (orcid)0000-0002-4297-4423 aut Peng, Tongjiang aut Zeng, Li aut Chao, Li aut Enthalten in Clean Products and Processes Springer-Verlag, 2001 24(2022), 5 vom: 06. Feb., Seite 1507-1519 (DE-627)SPR008711836 nnns volume:24 year:2022 number:5 day:06 month:02 pages:1507-1519 https://dx.doi.org/10.1007/s10098-021-02262-1 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER AR 24 2022 5 06 02 1507-1519 |
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10.1007/s10098-021-02262-1 doi (DE-627)SPR047201037 (SPR)s10098-021-02262-1-e DE-627 ger DE-627 rakwb eng Yang, Jingjie verfasserin aut Separation of alumina from aluminum-rich coal fly ash using NaOH molten salt calcination and hydrochemical process 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2022 Abstract High-alumina coal fly ash (CFA) is considered as an important and cheap resource of aluminum. On account of high valence aluminum often trapped in aluminosilicate basic glassy phase and mullite ($ Al_{6} %$ Si_{2} %$ O_{13} $), efficiently separating aluminum and silicon is an essential precondition for maximizing the recycling of alumina from CFA, which is conducive to reducing the environment danger. In this study, a novel process combining alkali calcination and hydrochemical treatment was proposed to efficiently separate aluminum and silicon in CFA. The reactivity of CFA was greatly improved after the calcination treatment. The results show that alumina-rich phase, mullite, was transformed into nepheline ($ NaAlSiO_{4} $) by calcination with NaOH at a mass ratio 0.8:1 ($ w_{NaOH} $:$ w_{CFA} $) and calcination temperatures of 400 °C, which improved the dissolution of aluminum during the hydrochemical process and enriched the silicon in the residue. Then, the influence of the parameters of the hydrochemical process on alumina extraction was investigated. The results indicated that the two-stage method was more efficient than the direct hydrochemical process. The optimum conditions of the hydrochemical process were 40% NaOH solution and heating at 260 °C for 60 min. Approximately 94% of the alumina was easily recovered, whereas most of the silicon was converted to $ NaCaHSiO_{4} $. The combined treatment method highlights the potential for aluminum production from CFA. Graphical abstract Coal fly ash (dpeaa)DE-He213 Alumina (dpeaa)DE-He213 Calcination (dpeaa)DE-He213 Hydrothermal treatment (dpeaa)DE-He213 Sun, Hongjuan (orcid)0000-0002-4297-4423 aut Peng, Tongjiang aut Zeng, Li aut Chao, Li aut Enthalten in Clean Products and Processes Springer-Verlag, 2001 24(2022), 5 vom: 06. Feb., Seite 1507-1519 (DE-627)SPR008711836 nnns volume:24 year:2022 number:5 day:06 month:02 pages:1507-1519 https://dx.doi.org/10.1007/s10098-021-02262-1 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER AR 24 2022 5 06 02 1507-1519 |
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10.1007/s10098-021-02262-1 doi (DE-627)SPR047201037 (SPR)s10098-021-02262-1-e DE-627 ger DE-627 rakwb eng Yang, Jingjie verfasserin aut Separation of alumina from aluminum-rich coal fly ash using NaOH molten salt calcination and hydrochemical process 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2022 Abstract High-alumina coal fly ash (CFA) is considered as an important and cheap resource of aluminum. On account of high valence aluminum often trapped in aluminosilicate basic glassy phase and mullite ($ Al_{6} %$ Si_{2} %$ O_{13} $), efficiently separating aluminum and silicon is an essential precondition for maximizing the recycling of alumina from CFA, which is conducive to reducing the environment danger. In this study, a novel process combining alkali calcination and hydrochemical treatment was proposed to efficiently separate aluminum and silicon in CFA. The reactivity of CFA was greatly improved after the calcination treatment. The results show that alumina-rich phase, mullite, was transformed into nepheline ($ NaAlSiO_{4} $) by calcination with NaOH at a mass ratio 0.8:1 ($ w_{NaOH} $:$ w_{CFA} $) and calcination temperatures of 400 °C, which improved the dissolution of aluminum during the hydrochemical process and enriched the silicon in the residue. Then, the influence of the parameters of the hydrochemical process on alumina extraction was investigated. The results indicated that the two-stage method was more efficient than the direct hydrochemical process. The optimum conditions of the hydrochemical process were 40% NaOH solution and heating at 260 °C for 60 min. Approximately 94% of the alumina was easily recovered, whereas most of the silicon was converted to $ NaCaHSiO_{4} $. The combined treatment method highlights the potential for aluminum production from CFA. Graphical abstract Coal fly ash (dpeaa)DE-He213 Alumina (dpeaa)DE-He213 Calcination (dpeaa)DE-He213 Hydrothermal treatment (dpeaa)DE-He213 Sun, Hongjuan (orcid)0000-0002-4297-4423 aut Peng, Tongjiang aut Zeng, Li aut Chao, Li aut Enthalten in Clean Products and Processes Springer-Verlag, 2001 24(2022), 5 vom: 06. Feb., Seite 1507-1519 (DE-627)SPR008711836 nnns volume:24 year:2022 number:5 day:06 month:02 pages:1507-1519 https://dx.doi.org/10.1007/s10098-021-02262-1 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER AR 24 2022 5 06 02 1507-1519 |
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10.1007/s10098-021-02262-1 doi (DE-627)SPR047201037 (SPR)s10098-021-02262-1-e DE-627 ger DE-627 rakwb eng Yang, Jingjie verfasserin aut Separation of alumina from aluminum-rich coal fly ash using NaOH molten salt calcination and hydrochemical process 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2022 Abstract High-alumina coal fly ash (CFA) is considered as an important and cheap resource of aluminum. On account of high valence aluminum often trapped in aluminosilicate basic glassy phase and mullite ($ Al_{6} %$ Si_{2} %$ O_{13} $), efficiently separating aluminum and silicon is an essential precondition for maximizing the recycling of alumina from CFA, which is conducive to reducing the environment danger. In this study, a novel process combining alkali calcination and hydrochemical treatment was proposed to efficiently separate aluminum and silicon in CFA. The reactivity of CFA was greatly improved after the calcination treatment. The results show that alumina-rich phase, mullite, was transformed into nepheline ($ NaAlSiO_{4} $) by calcination with NaOH at a mass ratio 0.8:1 ($ w_{NaOH} $:$ w_{CFA} $) and calcination temperatures of 400 °C, which improved the dissolution of aluminum during the hydrochemical process and enriched the silicon in the residue. Then, the influence of the parameters of the hydrochemical process on alumina extraction was investigated. The results indicated that the two-stage method was more efficient than the direct hydrochemical process. The optimum conditions of the hydrochemical process were 40% NaOH solution and heating at 260 °C for 60 min. Approximately 94% of the alumina was easily recovered, whereas most of the silicon was converted to $ NaCaHSiO_{4} $. The combined treatment method highlights the potential for aluminum production from CFA. Graphical abstract Coal fly ash (dpeaa)DE-He213 Alumina (dpeaa)DE-He213 Calcination (dpeaa)DE-He213 Hydrothermal treatment (dpeaa)DE-He213 Sun, Hongjuan (orcid)0000-0002-4297-4423 aut Peng, Tongjiang aut Zeng, Li aut Chao, Li aut Enthalten in Clean Products and Processes Springer-Verlag, 2001 24(2022), 5 vom: 06. Feb., Seite 1507-1519 (DE-627)SPR008711836 nnns volume:24 year:2022 number:5 day:06 month:02 pages:1507-1519 https://dx.doi.org/10.1007/s10098-021-02262-1 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER AR 24 2022 5 06 02 1507-1519 |
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10.1007/s10098-021-02262-1 doi (DE-627)SPR047201037 (SPR)s10098-021-02262-1-e DE-627 ger DE-627 rakwb eng Yang, Jingjie verfasserin aut Separation of alumina from aluminum-rich coal fly ash using NaOH molten salt calcination and hydrochemical process 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2022 Abstract High-alumina coal fly ash (CFA) is considered as an important and cheap resource of aluminum. On account of high valence aluminum often trapped in aluminosilicate basic glassy phase and mullite ($ Al_{6} %$ Si_{2} %$ O_{13} $), efficiently separating aluminum and silicon is an essential precondition for maximizing the recycling of alumina from CFA, which is conducive to reducing the environment danger. In this study, a novel process combining alkali calcination and hydrochemical treatment was proposed to efficiently separate aluminum and silicon in CFA. The reactivity of CFA was greatly improved after the calcination treatment. The results show that alumina-rich phase, mullite, was transformed into nepheline ($ NaAlSiO_{4} $) by calcination with NaOH at a mass ratio 0.8:1 ($ w_{NaOH} $:$ w_{CFA} $) and calcination temperatures of 400 °C, which improved the dissolution of aluminum during the hydrochemical process and enriched the silicon in the residue. Then, the influence of the parameters of the hydrochemical process on alumina extraction was investigated. The results indicated that the two-stage method was more efficient than the direct hydrochemical process. The optimum conditions of the hydrochemical process were 40% NaOH solution and heating at 260 °C for 60 min. Approximately 94% of the alumina was easily recovered, whereas most of the silicon was converted to $ NaCaHSiO_{4} $. The combined treatment method highlights the potential for aluminum production from CFA. Graphical abstract Coal fly ash (dpeaa)DE-He213 Alumina (dpeaa)DE-He213 Calcination (dpeaa)DE-He213 Hydrothermal treatment (dpeaa)DE-He213 Sun, Hongjuan (orcid)0000-0002-4297-4423 aut Peng, Tongjiang aut Zeng, Li aut Chao, Li aut Enthalten in Clean Products and Processes Springer-Verlag, 2001 24(2022), 5 vom: 06. Feb., Seite 1507-1519 (DE-627)SPR008711836 nnns volume:24 year:2022 number:5 day:06 month:02 pages:1507-1519 https://dx.doi.org/10.1007/s10098-021-02262-1 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER AR 24 2022 5 06 02 1507-1519 |
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Yang, Jingjie Sun, Hongjuan Peng, Tongjiang Zeng, Li Chao, Li |
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Elektronische Aufsätze |
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Yang, Jingjie |
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10.1007/s10098-021-02262-1 |
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separation of alumina from aluminum-rich coal fly ash using naoh molten salt calcination and hydrochemical process |
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Separation of alumina from aluminum-rich coal fly ash using NaOH molten salt calcination and hydrochemical process |
| abstract |
Abstract High-alumina coal fly ash (CFA) is considered as an important and cheap resource of aluminum. On account of high valence aluminum often trapped in aluminosilicate basic glassy phase and mullite ($ Al_{6} %$ Si_{2} %$ O_{13} $), efficiently separating aluminum and silicon is an essential precondition for maximizing the recycling of alumina from CFA, which is conducive to reducing the environment danger. In this study, a novel process combining alkali calcination and hydrochemical treatment was proposed to efficiently separate aluminum and silicon in CFA. The reactivity of CFA was greatly improved after the calcination treatment. The results show that alumina-rich phase, mullite, was transformed into nepheline ($ NaAlSiO_{4} $) by calcination with NaOH at a mass ratio 0.8:1 ($ w_{NaOH} $:$ w_{CFA} $) and calcination temperatures of 400 °C, which improved the dissolution of aluminum during the hydrochemical process and enriched the silicon in the residue. Then, the influence of the parameters of the hydrochemical process on alumina extraction was investigated. The results indicated that the two-stage method was more efficient than the direct hydrochemical process. The optimum conditions of the hydrochemical process were 40% NaOH solution and heating at 260 °C for 60 min. Approximately 94% of the alumina was easily recovered, whereas most of the silicon was converted to $ NaCaHSiO_{4} $. The combined treatment method highlights the potential for aluminum production from CFA. Graphical abstract © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2022 |
| abstractGer |
Abstract High-alumina coal fly ash (CFA) is considered as an important and cheap resource of aluminum. On account of high valence aluminum often trapped in aluminosilicate basic glassy phase and mullite ($ Al_{6} %$ Si_{2} %$ O_{13} $), efficiently separating aluminum and silicon is an essential precondition for maximizing the recycling of alumina from CFA, which is conducive to reducing the environment danger. In this study, a novel process combining alkali calcination and hydrochemical treatment was proposed to efficiently separate aluminum and silicon in CFA. The reactivity of CFA was greatly improved after the calcination treatment. The results show that alumina-rich phase, mullite, was transformed into nepheline ($ NaAlSiO_{4} $) by calcination with NaOH at a mass ratio 0.8:1 ($ w_{NaOH} $:$ w_{CFA} $) and calcination temperatures of 400 °C, which improved the dissolution of aluminum during the hydrochemical process and enriched the silicon in the residue. Then, the influence of the parameters of the hydrochemical process on alumina extraction was investigated. The results indicated that the two-stage method was more efficient than the direct hydrochemical process. The optimum conditions of the hydrochemical process were 40% NaOH solution and heating at 260 °C for 60 min. Approximately 94% of the alumina was easily recovered, whereas most of the silicon was converted to $ NaCaHSiO_{4} $. The combined treatment method highlights the potential for aluminum production from CFA. Graphical abstract © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2022 |
| abstract_unstemmed |
Abstract High-alumina coal fly ash (CFA) is considered as an important and cheap resource of aluminum. On account of high valence aluminum often trapped in aluminosilicate basic glassy phase and mullite ($ Al_{6} %$ Si_{2} %$ O_{13} $), efficiently separating aluminum and silicon is an essential precondition for maximizing the recycling of alumina from CFA, which is conducive to reducing the environment danger. In this study, a novel process combining alkali calcination and hydrochemical treatment was proposed to efficiently separate aluminum and silicon in CFA. The reactivity of CFA was greatly improved after the calcination treatment. The results show that alumina-rich phase, mullite, was transformed into nepheline ($ NaAlSiO_{4} $) by calcination with NaOH at a mass ratio 0.8:1 ($ w_{NaOH} $:$ w_{CFA} $) and calcination temperatures of 400 °C, which improved the dissolution of aluminum during the hydrochemical process and enriched the silicon in the residue. Then, the influence of the parameters of the hydrochemical process on alumina extraction was investigated. The results indicated that the two-stage method was more efficient than the direct hydrochemical process. The optimum conditions of the hydrochemical process were 40% NaOH solution and heating at 260 °C for 60 min. Approximately 94% of the alumina was easily recovered, whereas most of the silicon was converted to $ NaCaHSiO_{4} $. The combined treatment method highlights the potential for aluminum production from CFA. Graphical abstract © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2022 |
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Separation of alumina from aluminum-rich coal fly ash using NaOH molten salt calcination and hydrochemical process |
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