Method to lower the formation of clods and the clustering...

C - Chemistry – Metallurgy – 22 – B

Patent

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C22B 1/16 (2006.01) B01J 2/30 (2006.01) C21B 3/00 (2006.01) C21B 13/08 (2006.01)

Patent

CA 2284603

The invention relates to a method for reducing the formation of clods and the clustering tendency of reducible iron-containing agglomerated material, particularly so-called pellets, whereby the reducible iron- containing agglomerated material, following a desulphurisation process that takes place after a sintering process during the manufacture of the said pellets, is given an outer layer of clustering-reducing material in the form of a liquid suspension of particulate material. According to the invention, a more even distribution of the coating on the surface of the agglomerate is achieved in that the application of the liquid suspension takes place during tumbling in a drum that is designed so that the agglomerate together with the liquid suspension can essentially pass freely through it.

L'invention concerne un procédé permettant de réduire la tendance à la formation de grumauts et à l'encrassement d'une matière agglomérée contenant du fer et réductible, notamment de granulés. La matière agglomérée contenant du fer et réductible, en relation avec un procédé de désulfuration effectué après un procédé de frittage lors de la production desdits granulés, est dotée d'une couche extérieure d'une matière réductrice d'encrassement sous la forme d'une suspension liquide de matière particulaire. Selon l'invention, une répartition plus uniforme de l'enrobage sur la surface de l'agglomérat est accomplie en ce que la suspension liquide est appliquée lorsque les agglomérats roulent dans le tambour qui est conçu de telle façon que l'aggloméré avec la suspension liquide puissent sensiblement passer librement à travers.

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