Process for producing agglomerates of finely particulate...

C - Chemistry – Metallurgy – 22 – B

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C22B 1/24 (2006.01) C21B 13/00 (2006.01) C22B 1/242 (2006.01) C22B 5/14 (2006.01)

Patent

CA 2736535

A description is given of a process for producing agglomerates composed of finely particulate iron carriers and at least one binder as starting material for a metallurgical process. The agglomerates are, in at least one further agglomeration step, coated with a layer consisting of iron carriers and at least one binder and heated in such a way that only the binder in the region of the surface of the agglomerates is cured. In a process for producing liquid pig iron or liquid steel raw products from starting materials and if appropriate additives and agglomerates, the agglomerates are preheated in a reduction zone which has a preheating stage in such a way that the agglomerates cure fully in the preheating stage.

L'invention concerne un procédé de production d'agglomérats formés de porteurs de fer à grains fins et d'au moins un liant comme matière de charge pour un processus métallurgique. Les agglomérats sont, dans au moins une autre étape d'agglomération, recouverts d'une couche formée de porteurs de fer et d'au moins un liant, et chauffés de façon qu'uniquement le liant durcisse dans la zone de la surface de l'agglomérat. L'invention concerne un procédé de production de fonte brute liquide ou de produits de base d'acier liquides formés de matières de charge et, optionnellement de matières d'addition et d'agglomérats, procédé selon lequel les agglomérats sont préchauffés dans une zone de réduction qui présente un étage de préchauffage, de telle façon que les agglomérats durcissent complètement dans l'étage de préchauffage.

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