Skip to Main content Skip to Navigation
Theses

Modélisation mathématique détaillée du procédé de réduction directe du minerai de fer

Abstract : This thesis is dedicated to the modelling of the iron ore direct reduction process, an attractive alternative process for making steel in the context of the reduction in CO2 emissions. The shaft furnace, the core reactor of the process, is divided into three sections (reduction, transition and cooling). The mathematical model developed to simulate this reactor is based on a detailed and faithful description of the main physical-chemical and thermal phenomena involved. The model is a two-dimensional, steady state and multi-scale. The moving bed is comprised of pellets of grains and crystallites. Eight heterogeneous chemical reactions and two homogeneous chemical reactions were taken into account. The local mass, energy and momentum balances were solved numerically using the finite volume method. The model was successfully applied to simulate the shaft furnace of two direct reduction plants of different capacities. The results obtained provide new insights on the internal behaviour of the furnace and highlight zones of uneven performance. After the addition and coupling of a reformer model, the shaft furnace model was used for parametric calculations, in particular when considering changes in the composition of the reducing gases. Finally, new possibilities are presented for optimizing the direct reduction process, e.g. for increasing the production capacity and the degree of metallization of the produced iron
Complete list of metadatas

https://tel.archives-ouvertes.fr/tel-01740462
Contributor : Abes Star :  Contact
Submitted on : Monday, June 25, 2018 - 3:20:07 PM
Last modification on : Monday, April 6, 2020 - 2:44:04 PM
Long-term archiving on: : Wednesday, September 26, 2018 - 2:26:17 PM

File

DDOC_T_2017_0274_HAMADEH.pdf
Files produced by the author(s)

Identifiers

  • HAL Id : tel-01740462, version 2

Citation

Hamzeh Hamadeh. Modélisation mathématique détaillée du procédé de réduction directe du minerai de fer. Matériaux. Université de Lorraine, 2017. Français. ⟨NNT : 2017LORR0274⟩. ⟨tel-01740462v2⟩

Share

Metrics

Record views

384

Files downloads

602