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• W2033290915 abstract "In this work, a mathematical model of the pilot scale iron ore pellet induration furnace is presented. The validity of the model has been verified by performing separate experiments of subprocesses: drying, firing and cooling. The experiments were performed in such a way that the phenomena of heat transfer, drying and coke combustion could be studied separately. To do this, the green pellets were first dried, then heated to elevated temperatures at which the coke combustion commences and the pellet strength begins to increase. Finally, the pellets were cooled by passing ambient air across the bed.The pellet induration model is based on the equations describing the phenomena of heat and mass transfer, gas flow, drying and combustion of coke. The experiments and the pellet induration cycle were simulated by solving the differential equations. The pellet bed was divided into differential height elements and the phenomenological equations were solved by numerical methods. This type of model is very useful in many applications such as designing of new plants, evaluating the effectiveness of different process parameters and training the operators and engineers. In addition, it can also serve as a module for on-line control of the moving grate furnace operations. Résumé Dans cet article, un modèle mathématique du four pilote de frittage des boulettes de concentré d'oxyde de fer est présenté et une étude expérimentale est réalisée en effectuant des expériences de séchage, de cuisson et de refroidissement des boulettes. Les expériences ont été réalisées d'une telle façon que les phénomènes de transfert de chaleur, de séchage et de combustion de carbone peuvent être étudiés séparément. Pour ce faire, on a fait circuler de l'air chauffé au travers du lit de boulettes, les boulettes vertes ont été séchées, ensuite soumises à des témpératures trés élevées pour initier la combustion des particules de coke dans les boulettes et activer l'augmentation de leur résistance. Finalement, les boulettes ont été refroidies en faisant circuler de l'air froid au travers du lit.Le modèle phénoménologique du four pilote est basé sur les équations qui décrivent les phénomenes de transfert de chaleur et de matière, d' écoulement du gaz, de séchage et de combustion du coke. Les expériences et le fonctionnement d'un cycle de préparation des boulettes dans le four ont été simulés en résolvant les équations différentielles par les méthodes numériques. Le modèle est très utile pour la conception de cycles de préparation des boulettes, l' étude du rôle des différents paramétres opératoires et la formation des opérateurs. Le modèle peut servir de module de base pour le contrôle dynamique des opérations de four de cuisson des boulettes à lit mobile." @default.
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• W2033290915 date "1994-01-01" @default.
• W2033290915 modified "2023-09-27" @default.
• W2033290915 title "Modelling of a Pilot Scale Iron Ore Pellet Induration Furnace" @default.
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• W2033290915 doi "https://doi.org/10.1179/cmq.1994.33.1.1" @default.
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