Method of optimizing the design and operation of a reduction...

C - Chemistry – Metallurgy – 21 – B

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C21B 13/14 (2006.01) C21B 13/00 (2006.01)

Patent

CA 2363492

A description is given of a method of optimizing the design and operation of a reduction process for iron-containing charge materials (3), preferably in lump form, in a reduction shaft (1) to which reduction gas (9) is fed, for example from a fusion gasifier (6), with a reduced product (13), for example iron sponge, being taken from the reduction shaft (1) for the production of liquid pig iron or liquid primary steel products, in which method the reduction process is described by means of a mathematical-physical-chemical process model, the reduction shaft (1) is modelled multi-dimensionally, in particular three-dimensionally, and the process model is numerically evaluated and the results of the evaluation, obtained as multi-dimensional, in particular spatial, distributions of physical or chemical variables, are taken into account for the reduction process. This allows the reduction process to be quantitatively assessed in the entire reduction shaft and, as a result, the reduction process can be optimized.

Procédé d'optimisation de la conception et de la mise en oeuvre d'un procédé de réduction de matière de départ (3), de préférence en morceaux, contenant du fer dans une cuve de réduction (1) dans laquelle est introduit du gaz de réduction (9), provenant par exemple d'un gazéificateur de métal en fusion, un produit réduit (13), par exemple de l'éponge de fer, étant prélevé de la cuve de réduction (1) pour la fabrication de fonte brute liquide ou de produits primaires liquides de l'acier. Selon ledit procédé, le procédé de réduction est décrit à l'aide d'un modèle de processus mathématico-physico-chimique et la cuve de réduction (1) est modélisée en plusieurs dimensions, en particulier en trois dimensions, le modèle de processus est évalué numériquement et les résultats de l'évaluation obtenus en tant que répartitions à plusieurs dimensions, en particulier dans l'espace, de grandeurs physiques et chimiques sont pris en considération pour le procédé de réduction. Il est ainsi possible d'évaluer de manière quantitative le procédé de réduction dans l'ensemble de la cuve de réduction et, partant, d'optimiser ledit procédé.

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