Treatment of bauxite residues: Acidic leaching: First part
Introduction/purpose: Bauxite residue as a waste product from the aluminium industry produced through the Bayer process is mainly composed of iron oxide, titanium oxide, silicon oxide and undissolved alumina together with a wide range of other oxides and a minor content of rare earth elements, galli...
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| Format: | Article |
| Language: | English |
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University of Defence in Belgrade
2023-10-01
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| Series: | Vojnotehnički Glasnik |
| Subjects: | |
| Online Access: | https://scindeks.ceon.rs/article.aspx?artid=0042-84692304069S |
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| author | Srećko R. Stopić Vladimir Damjanović Radislav Filipović Mary D. Kamara Bernd G. Friedrich |
| author_facet | Srećko R. Stopić Vladimir Damjanović Radislav Filipović Mary D. Kamara Bernd G. Friedrich |
| author_sort | Srećko R. Stopić |
| collection | DOAJ |
| description | Introduction/purpose: Bauxite residue as a waste product from the aluminium industry produced through the Bayer process is mainly composed of iron oxide, titanium oxide, silicon oxide and undissolved alumina together with a wide range of other oxides and a minor content of rare earth elements, gallium, vanadium and scandium, which vary according to the country of origin of the bauxite. The extraction of valuable elements from bauxite residues and the minimisation of bauxite residues during different treatments are an open research field. Methods: Different hydrometallurgical and pyrometallurgical methods were used for the treatment of bauxite residues. In this study, the results of the hydrometallurgical treatment of bauxite residue from Alumina Zvornik using sulfuric acid and hydrochloric acid will be shown in order to study the change of the mineralogical composition. Leaching efficiency will be calculated using the ICP OES analysis. The XRD-Analysis was used for the characterization of the initial material and solid residues studying the change of the mineralogical phases. Results: Leaching of bauxite residues with sulphuric and hydrochloric acid leads partially to the change of mineralogical structure and the transfer of elements into a liquid phase. Natural precipitation of iron is observed over time. Silica gel formation is confirmed during leaching of bauxite residues with hydrochloric acid. Conclusion: A new research strategy for treating bauxite residue is needed in order to ensure a complete change of the initial minearlogical structure and the most efficient transfer of metals into a liquid phase. |
| first_indexed | 2024-03-08T21:09:20Z |
| format | Article |
| id | doaj.art-48f0201cea9541d1a9acb8197e74daff |
| institution | Directory Open Access Journal |
| issn | 0042-8469 2217-4753 |
| language | English |
| last_indexed | 2024-03-08T21:09:20Z |
| publishDate | 2023-10-01 |
| publisher | University of Defence in Belgrade |
| record_format | Article |
| series | Vojnotehnički Glasnik |
| spelling | doaj.art-48f0201cea9541d1a9acb8197e74daff2023-12-22T08:13:29ZengUniversity of Defence in BelgradeVojnotehnički Glasnik0042-84692217-47532023-10-017141069108610.5937/vojtehg71-46212Treatment of bauxite residues: Acidic leaching: First partSrećko R. Stopić0https://orcid.org/0000-0002-1752-5378Vladimir Damjanović1https://orcid.org/0000-0002-5375-440XRadislav Filipović2https://orcid.org/0009-0000-9938-2499Mary D. Kamara3https://orcid.org/0009-0005-1923-3570 Bernd G. Friedrich4https://orcid.org/0000-0002-2934-2034 RWTH Aachen University, IME Process Metallurgy and Metal Recycling, Aachen, Federal Republic of GermanyAlumina Ltd, Zvornik, Republic of Srpska, Bosnia and HerzegovinaAlumina Ltd, Zvornik, Republic of Srpska, Bosnia and HerzegovinaRWTH Aachen University, IME Process Metallurgy and Metal Recycling, Aachen, Federal Republic of GermanyRWTH Aachen University, IME Process Metallurgy and Metal Recycling, Aachen, Federal Republic of GermanyIntroduction/purpose: Bauxite residue as a waste product from the aluminium industry produced through the Bayer process is mainly composed of iron oxide, titanium oxide, silicon oxide and undissolved alumina together with a wide range of other oxides and a minor content of rare earth elements, gallium, vanadium and scandium, which vary according to the country of origin of the bauxite. The extraction of valuable elements from bauxite residues and the minimisation of bauxite residues during different treatments are an open research field. Methods: Different hydrometallurgical and pyrometallurgical methods were used for the treatment of bauxite residues. In this study, the results of the hydrometallurgical treatment of bauxite residue from Alumina Zvornik using sulfuric acid and hydrochloric acid will be shown in order to study the change of the mineralogical composition. Leaching efficiency will be calculated using the ICP OES analysis. The XRD-Analysis was used for the characterization of the initial material and solid residues studying the change of the mineralogical phases. Results: Leaching of bauxite residues with sulphuric and hydrochloric acid leads partially to the change of mineralogical structure and the transfer of elements into a liquid phase. Natural precipitation of iron is observed over time. Silica gel formation is confirmed during leaching of bauxite residues with hydrochloric acid. Conclusion: A new research strategy for treating bauxite residue is needed in order to ensure a complete change of the initial minearlogical structure and the most efficient transfer of metals into a liquid phase.https://scindeks.ceon.rs/article.aspx?artid=0042-84692304069Sbauxite residuesaluminiumhydrometallurgyacidrecyclingrare earth elements |
| spellingShingle | Srećko R. Stopić Vladimir Damjanović Radislav Filipović Mary D. Kamara Bernd G. Friedrich Treatment of bauxite residues: Acidic leaching: First part Vojnotehnički Glasnik bauxite residues aluminium hydrometallurgy acid recycling rare earth elements |
| title | Treatment of bauxite residues: Acidic leaching: First part |
| title_full | Treatment of bauxite residues: Acidic leaching: First part |
| title_fullStr | Treatment of bauxite residues: Acidic leaching: First part |
| title_full_unstemmed | Treatment of bauxite residues: Acidic leaching: First part |
| title_short | Treatment of bauxite residues: Acidic leaching: First part |
| title_sort | treatment of bauxite residues acidic leaching first part |
| topic | bauxite residues aluminium hydrometallurgy acid recycling rare earth elements |
| url | https://scindeks.ceon.rs/article.aspx?artid=0042-84692304069S |
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