Kinetic behaviour of the roasting/selective reduction process with the use of a mixture of bituminous coal and fuel oil as the additive
Lateritic ore is currently the main raw material that allows extraction of Ni by the Caron process. To date, the kinetic behaviour of the roasting/selective reduction process of lateritic nickeli-ferous ores on a pilot scale is largely unknown. In the present study, the kinetic behaviour, the contro...
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| Language: | English |
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Association of Chemical Engineers of Serbia
2025-01-01
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| Series: | Hemijska Industrija |
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| Online Access: | https://doiserbia.nb.rs/img/doi/0367-598X/2025/0367-598X2500005A.pdf |
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| author | Angulo-Palma Hugo Javier Saldana Manuel Legrá Ángel Legrá Urgellés Alisa Lamorú Pedrera Carlos Hernández Gallegos Sandra Galleguillos Madrid Felipe M. Toro Norman |
| author_facet | Angulo-Palma Hugo Javier Saldana Manuel Legrá Ángel Legrá Urgellés Alisa Lamorú Pedrera Carlos Hernández Gallegos Sandra Galleguillos Madrid Felipe M. Toro Norman |
| author_sort | Angulo-Palma Hugo Javier |
| collection | DOAJ |
| description | Lateritic ore is currently the main raw material that allows extraction of Ni by the Caron process. To date, the kinetic behaviour of the roasting/selective reduction process of lateritic nickeli-ferous ores on a pilot scale is largely unknown. In the present study, the kinetic behaviour, the controlling stage and the mechanisms that describe this process with the use of a mixture of 2 wt.% bituminous coal and 1.25 wt.% fuel oil as a reducing additive were determined during the evaluation of the high and low thermal profiles, respectively. The phases of the reduced/le-ached minerals and the fed ore were analysed by X-ray powder diffraction. It was observed that the mixture used as a reducing additive guarantees an adequate transformation in both thermal profiles; the relationship between the residual Ni and residence time is described by a first-order reaction with the determination coefficients greater than 0.949. Although the influence of post-combustion air is not analysed, the controlling stage was diffusion through the ash layer with an activation energy of 14.4060 kJ mol-1. Thus, the most precise combination to describe the process is diffusion through the ash layer and the growth of the nuclei. |
| format | Article |
| id | doaj-art-7bbcbc874acd4194bacbd3f4b0ffee7d |
| institution | DOAJ |
| issn | 0367-598X 2217-7426 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Association of Chemical Engineers of Serbia |
| record_format | Article |
| series | Hemijska Industrija |
| spelling | doaj-art-7bbcbc874acd4194bacbd3f4b0ffee7d2025-08-20T03:09:25ZengAssociation of Chemical Engineers of SerbiaHemijska Industrija0367-598X2217-74262025-01-01792697710.2298/HEMIND240918005A0367-598X2500005AKinetic behaviour of the roasting/selective reduction process with the use of a mixture of bituminous coal and fuel oil as the additiveAngulo-Palma Hugo Javier0https://orcid.org/0000-0002-5012-0348Saldana Manuel1https://orcid.org/0000-0001-9265-1529Legrá Ángel Legrá2https://orcid.org/0000-0002-4456-6546Urgellés Alisa Lamorú3https://orcid.org/0009-0002-3621-170XPedrera Carlos Hernández4https://orcid.org/0000-0003-2572-0891Gallegos Sandra5https://orcid.org/0009-0004-3145-1944Galleguillos Madrid Felipe M.6https://orcid.org/0000-0002-1347-3726Toro Norman7https://orcid.org/0000-0003-4273-3563Centro de Investigaciones del Níquel "Alberto Fernández Montes de Oca" (CEDINIQ), Moa, Holguín, Cuba + Departamento de Metalurgia Química, Universidad de Moa, Holguín, CubaFaculty of Engineering and Architecture, Universidad Arturo Prat, Iquique, Chile + Departamento de Ingeniería Química y Procesos de Minerales, Universidad de Antofagasta, Antofagasta, ChileCentro de Investigaciones del Níquel "Alberto Fernández Montes de Oca2 (CEDINIQ), Moa, Holguín, CubaCentro de Investigaciones del Níquel "Alberto Fernández Montes de Oca" (CEDINIQ), Moa, Holguín, CubaFacultad de Ingeniería Química y Agronomía, Universidad de Oriente, Santiago de Cuba, CubaFaculty of Engineering and Architecture, Universidad Arturo Prat, Iquique, ChileCentro de Desarrollo Energético Antofagasta, Universidad de Antofagasta, Antofagasta, ChileFaculty of Engineering and Architecture, Universidad Arturo Prat, Iquique, ChileLateritic ore is currently the main raw material that allows extraction of Ni by the Caron process. To date, the kinetic behaviour of the roasting/selective reduction process of lateritic nickeli-ferous ores on a pilot scale is largely unknown. In the present study, the kinetic behaviour, the controlling stage and the mechanisms that describe this process with the use of a mixture of 2 wt.% bituminous coal and 1.25 wt.% fuel oil as a reducing additive were determined during the evaluation of the high and low thermal profiles, respectively. The phases of the reduced/le-ached minerals and the fed ore were analysed by X-ray powder diffraction. It was observed that the mixture used as a reducing additive guarantees an adequate transformation in both thermal profiles; the relationship between the residual Ni and residence time is described by a first-order reaction with the determination coefficients greater than 0.949. Although the influence of post-combustion air is not analysed, the controlling stage was diffusion through the ash layer with an activation energy of 14.4060 kJ mol-1. Thus, the most precise combination to describe the process is diffusion through the ash layer and the growth of the nuclei.https://doiserbia.nb.rs/img/doi/0367-598X/2025/0367-598X2500005A.pdfreaction kinetics and mechanismsfurnace operationpyrometallurgylateritic nickeliferous orecaron process |
| spellingShingle | Angulo-Palma Hugo Javier Saldana Manuel Legrá Ángel Legrá Urgellés Alisa Lamorú Pedrera Carlos Hernández Gallegos Sandra Galleguillos Madrid Felipe M. Toro Norman Kinetic behaviour of the roasting/selective reduction process with the use of a mixture of bituminous coal and fuel oil as the additive Hemijska Industrija reaction kinetics and mechanisms furnace operation pyrometallurgy lateritic nickeliferous ore caron process |
| title | Kinetic behaviour of the roasting/selective reduction process with the use of a mixture of bituminous coal and fuel oil as the additive |
| title_full | Kinetic behaviour of the roasting/selective reduction process with the use of a mixture of bituminous coal and fuel oil as the additive |
| title_fullStr | Kinetic behaviour of the roasting/selective reduction process with the use of a mixture of bituminous coal and fuel oil as the additive |
| title_full_unstemmed | Kinetic behaviour of the roasting/selective reduction process with the use of a mixture of bituminous coal and fuel oil as the additive |
| title_short | Kinetic behaviour of the roasting/selective reduction process with the use of a mixture of bituminous coal and fuel oil as the additive |
| title_sort | kinetic behaviour of the roasting selective reduction process with the use of a mixture of bituminous coal and fuel oil as the additive |
| topic | reaction kinetics and mechanisms furnace operation pyrometallurgy lateritic nickeliferous ore caron process |
| url | https://doiserbia.nb.rs/img/doi/0367-598X/2025/0367-598X2500005A.pdf |
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