Abstract
During the sintering process of iron ore, the size of coke is a crucial variable that affects the sintering efficiency and the quality of the sinter. Improper coke size will destroy the thermal balance during the sintering process, leading to under-burning or over-burning, causing the deterioration of the key metallurgical properties of the sinter. This study uses a three-dimensional transient model to numerically simulate the iron ore sintering process, which makes up for the shortcomings of traditional one-dimensional and two-dimensional models that ignore the heat transfer mechanism in the cross-sectional direction. By selecting typical coke sizes in sintering data, establishing a numerical simulation model of the sintering trolley grid system and multi-physics fields. Based on the simulation results, comprehensively analysed the similarities and differences of the combustion zone state, macroscopic temperature distribution, and sintering bed temperature curve under different coke size distribution conditions. On this basis, the influence of coke size on the evolution of temperature field in the whole sintering system was systematically studied. This study reveals the deep-seated relationship between coke size and various characteristics of the sintering process, which has important guiding significance for optimising iron ore sintering process parameters, improving sinter quality and sintering efficiency.
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