Study on electrolytic reduction with controlled oxygen flow for iron from molten oxide slag containing FeO
A ZrO2-based solid membrane electrolytic cell with controlled oxygen flow was constructed: graphite rod /[O]Fe+C saturated / ZrO2(MgO)/(FeO) slag/iron crucible. The feasibility of extraction of iron from molten oxide slag containing FeO at an applied voltage was investigated by means of the elec...
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University of Belgrade, Technical Faculty, Bor
2013-01-01
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| Series: | Journal of Mining and Metallurgy. Section B: Metallurgy |
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| Online Access: | http://www.doiserbia.nb.rs/img/doi/1450-5339/2013/1450-53391200036G.pdf |
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| author | Gao Y.M. Wang B. Wang S.B. Peng S. |
| author_facet | Gao Y.M. Wang B. Wang S.B. Peng S. |
| author_sort | Gao Y.M. |
| collection | DOAJ |
| description | A ZrO2-based solid membrane electrolytic cell with controlled oxygen flow was constructed: graphite rod /[O]Fe+C saturated / ZrO2(MgO)/(FeO) slag/iron crucible. The feasibility of extraction of iron from molten oxide slag containing FeO at an applied voltage was investigated by means of the electrolytic cell. The effects of some important process factors on the FeO electrolytic reduction with the controlled oxygen flow were discussed. The results show that: solid iron can be extracted from molten oxide slag containing FeO at 1450ºC and an applied potential of 4V. These factors, such as precipitation and growth of solid iron dendrites, change of the cathode active area on the inner wall of the iron crucible and ion diffusion flux in the molten slag may affect the electrochemical reaction rate. The reduction for Fe2+ ions mainly appears on new iron dendrites of the iron crucible cathode, and a very small amount of iron are also formed on the MSZ (2.18% MgO partially stabilized zirconia) tube/slag interface due to electronic conductance of MSZ tube. Internal electronic current through MSZ tube may change direction at earlier and later electrolytic reduction stage. It has a role of promoting electrolytic reduction for FeO in the molten slag at the earlier stage, but will lower the current efficiency at the later stage. The final reduction ratio of FeO in the molten slag can achieve 99%. A novel electrolytic method with controlled oxygen flow for iron from the molten oxide slag containing FeO was proposed. The theory of electrolytic reduction with the controlled oxygen flow was developed. |
| format | Article |
| id | doaj-art-3b644e5d406d4f76b6d52b0f4e4cdde5 |
| institution | Kabale University |
| issn | 1450-5339 |
| language | English |
| publishDate | 2013-01-01 |
| publisher | University of Belgrade, Technical Faculty, Bor |
| record_format | Article |
| series | Journal of Mining and Metallurgy. Section B: Metallurgy |
| spelling | doaj-art-3b644e5d406d4f76b6d52b0f4e4cdde52025-02-02T08:26:44ZengUniversity of Belgrade, Technical Faculty, BorJournal of Mining and Metallurgy. Section B: Metallurgy1450-53392013-01-01491495510.2298/JMMB120112036GStudy on electrolytic reduction with controlled oxygen flow for iron from molten oxide slag containing FeOGao Y.M.Wang B.Wang S.B.Peng S.A ZrO2-based solid membrane electrolytic cell with controlled oxygen flow was constructed: graphite rod /[O]Fe+C saturated / ZrO2(MgO)/(FeO) slag/iron crucible. The feasibility of extraction of iron from molten oxide slag containing FeO at an applied voltage was investigated by means of the electrolytic cell. The effects of some important process factors on the FeO electrolytic reduction with the controlled oxygen flow were discussed. The results show that: solid iron can be extracted from molten oxide slag containing FeO at 1450ºC and an applied potential of 4V. These factors, such as precipitation and growth of solid iron dendrites, change of the cathode active area on the inner wall of the iron crucible and ion diffusion flux in the molten slag may affect the electrochemical reaction rate. The reduction for Fe2+ ions mainly appears on new iron dendrites of the iron crucible cathode, and a very small amount of iron are also formed on the MSZ (2.18% MgO partially stabilized zirconia) tube/slag interface due to electronic conductance of MSZ tube. Internal electronic current through MSZ tube may change direction at earlier and later electrolytic reduction stage. It has a role of promoting electrolytic reduction for FeO in the molten slag at the earlier stage, but will lower the current efficiency at the later stage. The final reduction ratio of FeO in the molten slag can achieve 99%. A novel electrolytic method with controlled oxygen flow for iron from the molten oxide slag containing FeO was proposed. The theory of electrolytic reduction with the controlled oxygen flow was developed.http://www.doiserbia.nb.rs/img/doi/1450-5339/2013/1450-53391200036G.pdfoxygen-ion membraneelectrolytic reductioncontrolled oxygen flowmolten oxide slagiron |
| spellingShingle | Gao Y.M. Wang B. Wang S.B. Peng S. Study on electrolytic reduction with controlled oxygen flow for iron from molten oxide slag containing FeO Journal of Mining and Metallurgy. Section B: Metallurgy oxygen-ion membrane electrolytic reduction controlled oxygen flow molten oxide slag iron |
| title | Study on electrolytic reduction with controlled oxygen flow for iron from molten oxide slag containing FeO |
| title_full | Study on electrolytic reduction with controlled oxygen flow for iron from molten oxide slag containing FeO |
| title_fullStr | Study on electrolytic reduction with controlled oxygen flow for iron from molten oxide slag containing FeO |
| title_full_unstemmed | Study on electrolytic reduction with controlled oxygen flow for iron from molten oxide slag containing FeO |
| title_short | Study on electrolytic reduction with controlled oxygen flow for iron from molten oxide slag containing FeO |
| title_sort | study on electrolytic reduction with controlled oxygen flow for iron from molten oxide slag containing feo |
| topic | oxygen-ion membrane electrolytic reduction controlled oxygen flow molten oxide slag iron |
| url | http://www.doiserbia.nb.rs/img/doi/1450-5339/2013/1450-53391200036G.pdf |
| work_keys_str_mv | AT gaoym studyonelectrolyticreductionwithcontrolledoxygenflowforironfrommoltenoxideslagcontainingfeo AT wangb studyonelectrolyticreductionwithcontrolledoxygenflowforironfrommoltenoxideslagcontainingfeo AT wangsb studyonelectrolyticreductionwithcontrolledoxygenflowforironfrommoltenoxideslagcontainingfeo AT pengs studyonelectrolyticreductionwithcontrolledoxygenflowforironfrommoltenoxideslagcontainingfeo |