caa a22 4500 467946779 CHVBK 20180322200725.0 cr unu---uuuuu 170328e19861001xx s 000 0 eng 10.1007/BF00553797 doi (NATIONALLICENCE)springer-10.1007/BF00553797 (NATIONALLICENCE)springer-10.1007/BF02402999 Analytical model for the swelling of sintered iron oxide pellets during the haematite-magnetite transformation [Elektronische Daten] [M. Jallouli, F. Ajersch] An analytical model for the swelling of sintered iron oxide pellets was developed, based on the variation of the elastic properties arising from the crystallographic and morphological changes that occur during a reduction reaction. The model is restricted to the haematite-magnetite transformation since this phase change was found to represent the largest overall volume increase of the reduction process. It is proposed that this swelling is the result of forces causing sequential fissurization of the bonds between the grains undergoing chemical and structural changes. The relative compressive strengths of the haematite and magnetite particles, the porosity and the pellet morphology are major parameters of the model. Equations of swelling for topochemical and non-topochemical types of reduction are developed independently. The relative contribution of each type of reduction mechanism was found to depend on the effect of the additive agent in the pellet. The model was successfully tested by comparison with experimental swelling results for certain SiO2, Al2O3, CaO and MgO additions. Chapman and Hall Ltd, 1986 Jallouli M. Ecole Nationale de I'Industrie Minière, Rabat, Morocco aut Ajersch F. Département de Génie métallurgie, Ecole Polytechnique, CP 6079, Succursale "A”, H3C 3A7, Montréal, Québec, Canada aut Journal of Materials Science Kluwer Academic Publishers 21/10(1986-10-01), 3528-3538 0022-2461 21:10<3528 1986 21 10853 https://doi.org/10.1007/BF00553797 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00553797 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Jallouli M. Ecole Nationale de I'Industrie Minière, Rabat, Morocco aut NATIONALLICENCE 700 1- Ajersch F. Département de Génie métallurgie, Ecole Polytechnique, CP 6079, Succursale "A”, H3C 3A7, Montréal, Québec, Canada aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers 21/10(1986-10-01), 3528-3538 0022-2461 21:10<3528 1986 21 10853 NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02402999 text/html Onlinezugriff via DOI Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE NATIONALLICENCE NL-springer