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Materials, Vol. 11, Pages 1094: Optimization of the Iron Ore Direct Reduction Process through Multiscale Process Modeling

Materials, Vol. 11, Pages 1094: Optimization of the Iron Ore Direct Reduction Process through Multiscale Process Modeling

Materials doi: 10.3390/ma11071094

Authors: Rami Béchara Hamzeh Hamadeh Olivier Mirgaux Fabrice Patisson

Iron ore direct reduction is an attractive alternative steelmaking process in the context of greenhouse gas mitigation. To simulate the process and explore possible optimization, we developed a systemic, multiscale process model. The reduction of the iron ore pellets is described using a specific grain model, reflecting the transformations from hematite to iron. The shaft furnace is modeled as a set of interconnected one-dimensional zones into which the principal chemical reactions (3-step reduction, methane reforming, Boudouard and water gas shift) are accounted for with their kinetics. The previous models are finally integrated in a global, plant-scale, model using the Aspen Plus software. The reformer, scrubber, and heat exchanger are included. Results at the shaft furnace scale enlighten the role of the different zones according to the physico-chemical phenomena occurring. At the plant scale, we demonstrate the capabilities of the model to investigate new operating conditions leading to lower CO2 emissions.

Authors:   Béchara, Rami ; Hamadeh, Hamzeh ; Mirgaux, Olivier ; Patisson, Fabrice
Journal:   Materials
Volume:   11
edition:   7
Year:   2018
Pages:   1094
DOI:   10.3390/ma11071094
Publication date:   27-Jun-2018
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