Kinetics of stibnite (Sb2S3) oxidation at roasting temperatures
Experimental work on the oxidation of stibnite (Sb2S3) was carried out at temperatures between 350 and 500°C and oxygen partial pressures between 1.01 and 21.28 kPa by using a thermogravimetric analysis method. The oxidation rate of stibnite was significantly influenced by both temperature...
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| Language: | English |
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University of Belgrade, Technical Faculty, Bor
2014-01-01
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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/1450-5339/2014/1450-53391400012P.pdf |
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| author | Padilla R. Aracena A. Ruiz M.C. |
| author_facet | Padilla R. Aracena A. Ruiz M.C. |
| author_sort | Padilla R. |
| collection | DOAJ |
| description | Experimental work on the oxidation of stibnite (Sb2S3) was carried out at
temperatures between 350 and 500°C and oxygen partial pressures between 1.01
and 21.28 kPa by using a thermogravimetric analysis method. The oxidation
rate of stibnite was significantly influenced by both temperature and partial
pressure of oxygen. Stibnite oxidized in one step to valentinite (Sb2O3) and
neither stibnite nor valentinite showed a detectable rate of volatilization
at these low temperatures. The oxidation reaction of stibnite was analyzed by
using the shrinking core model and it was found that the rate of reaction was
controlled by the surface chemical reaction and it was of 3/5 order with
respect to the oxygen partial pressure. The intrinsic rate constants were
determined and an activation energy value of 90.3 kJ/mol was obtained for the
range of temperature studied. |
| format | Article |
| id | doaj-art-a474328d56794e1384a41c7509718277 |
| institution | Kabale University |
| issn | 1450-5339 |
| language | English |
| publishDate | 2014-01-01 |
| publisher | University of Belgrade, Technical Faculty, Bor |
| record_format | Article |
| series | Journal of Mining and Metallurgy. Section B: Metallurgy |
| spelling | doaj-art-a474328d56794e1384a41c75097182772025-02-02T13:35:01ZengUniversity of Belgrade, Technical Faculty, BorJournal of Mining and Metallurgy. Section B: Metallurgy1450-53392014-01-0150212713210.2298/JMMB130131012P1450-53391400012PKinetics of stibnite (Sb2S3) oxidation at roasting temperaturesPadilla R.0Aracena A.1Ruiz M.C.2University of Concepcion, Department of Metallurgical Engineering, Concepcion, ChilePontificia Universidad Católica de Valparaíso, Escuela de Ingeniería, Valparaíso, ChileUniversity of Concepcion, Department of Metallurgical Engineering, Concepcion, ChileExperimental work on the oxidation of stibnite (Sb2S3) was carried out at temperatures between 350 and 500°C and oxygen partial pressures between 1.01 and 21.28 kPa by using a thermogravimetric analysis method. The oxidation rate of stibnite was significantly influenced by both temperature and partial pressure of oxygen. Stibnite oxidized in one step to valentinite (Sb2O3) and neither stibnite nor valentinite showed a detectable rate of volatilization at these low temperatures. The oxidation reaction of stibnite was analyzed by using the shrinking core model and it was found that the rate of reaction was controlled by the surface chemical reaction and it was of 3/5 order with respect to the oxygen partial pressure. The intrinsic rate constants were determined and an activation energy value of 90.3 kJ/mol was obtained for the range of temperature studied.http://www.doiserbia.nb.rs/img/doi/1450-5339/2014/1450-53391400012P.pdfAntimony sulfidestibnite oxidationkinetics |
| spellingShingle | Padilla R. Aracena A. Ruiz M.C. Kinetics of stibnite (Sb2S3) oxidation at roasting temperatures Journal of Mining and Metallurgy. Section B: Metallurgy Antimony sulfide stibnite oxidation kinetics |
| title | Kinetics of stibnite (Sb2S3) oxidation at roasting temperatures |
| title_full | Kinetics of stibnite (Sb2S3) oxidation at roasting temperatures |
| title_fullStr | Kinetics of stibnite (Sb2S3) oxidation at roasting temperatures |
| title_full_unstemmed | Kinetics of stibnite (Sb2S3) oxidation at roasting temperatures |
| title_short | Kinetics of stibnite (Sb2S3) oxidation at roasting temperatures |
| title_sort | kinetics of stibnite sb2s3 oxidation at roasting temperatures |
| topic | Antimony sulfide stibnite oxidation kinetics |
| url | http://www.doiserbia.nb.rs/img/doi/1450-5339/2014/1450-53391400012P.pdf |
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