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Mathematical model for a straight grate iron ore pellet induration process of industrial scale
, Article Computational Materials Science ; Volume 44, Issue 2 , December , 2008 , Pages 296-302 ; 09270256 (ISSN) ; Ferdowsi, A ; Payab, H ; Sharif University of Technology
2008
Abstract
A mathematical model is developed for induration of the iron-ore pellets in an industrial-scale plant based on the laws of mass, heat and momentum transfer. Physicochemical processes occurring during the induration of pellets such as drying of moisture, calcination of limestone and coke-magnetite reaction are considered to evaluate the gradient of temperature within the pellets. Differential equations describing transport phenomena in a grate bed are simultaneously solved by dividing the space in both x- and z- directions and numerically solving the phenomenological equations. A kinetic model is used for estimation of the change of the strength of the pellets due to firing. The model...