Kinetic behaviour of the roasting/selective reduction process with the use of a mixture of bituminous coal and fuel oil as the additive
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| Publicado en: | Hemijska Industrija vol. 79, no. 2 (2025), p. 69-79 |
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| 022 | |a 0367-598X | ||
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| 024 | 7 | |a 10.2298/HEMIND240918005A |2 doi | |
| 035 | |a 3241515358 | ||
| 045 | 2 | |b d20250401 |b d20250630 | |
| 100 | 1 | |a Angulo-Palma, Hugo Javier | |
| 245 | 1 | |a Kinetic behaviour of the roasting/selective reduction process with the use of a mixture of bituminous coal and fuel oil as the additive | |
| 260 | |b Hemijska Industrija |c 2025 | ||
| 513 | |a Journal Article | ||
| 520 | 3 | |a 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. | |
| 653 | |a Thermal transformations | ||
| 653 | |a X ray powder diffraction | ||
| 653 | |a Fuel oils | ||
| 653 | |a Diffusion layers | ||
| 653 | |a Bituminous coal | ||
| 653 | |a Raw materials | ||
| 653 | |a Mixtures | ||
| 653 | |a Ashes | ||
| 653 | |a Roasting | ||
| 653 | |a Furnaces | ||
| 653 | |a Minerals | ||
| 653 | |a Chemical elements | ||
| 653 | |a Temperature | ||
| 653 | |a Particle size | ||
| 653 | |a Nickel | ||
| 653 | |a Coal | ||
| 700 | 1 | |a Saldana, Manuel | |
| 700 | 1 | |a Legrá, Legrá Ángel | |
| 700 | 1 | |a Urgellés, Alisa Lamorú | |
| 700 | 1 | |a Pedrera Carlos Hernández | |
| 700 | 1 | |a Gallegos, Sandra | |
| 700 | 1 | |a Galleguillos Madrid Felipe M. | |
| 700 | 1 | |a Toro, Norman | |
| 773 | 0 | |t Hemijska Industrija |g vol. 79, no. 2 (2025), p. 69-79 | |
| 786 | 0 | |d ProQuest |t Engineering Database | |
| 856 | 4 | 1 | |3 Citation/Abstract |u https://www.proquest.com/docview/3241515358/abstract/embedded/7BTGNMKEMPT1V9Z2?source=fedsrch |
| 856 | 4 | 0 | |3 Full Text - PDF |u https://www.proquest.com/docview/3241515358/fulltextPDF/embedded/7BTGNMKEMPT1V9Z2?source=fedsrch |