Method for operating a sintering plant, as well as sintering...

C - Chemistry – Metallurgy – 22 – B

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C22B 1/20 (2006.01) B01D 53/74 (2006.01) B22F 3/00 (2006.01) F27B 21/06 (2006.01) C22B 7/02 (2006.01)

Patent

CA 2301667

A material (38) which acts as a catalyst for breaking down dioxins is added to the sintering material (10) in a sintering plant in the form of fine grains or dust before sintering, and then sintered with said sintering material (10), in order to reduce the dioxins in the waste gas. The catalyst material (38) added prevents dioxins from reforming and reduces the dioxins contained in the waste gas (24) which passes through the sintering material (10). Said catalyst material (38) is integrated into the agglomerate of sintering material (10) produced and can be disposed of safely and reliably with the slag produced during the subsequent blast furnace process.

Selon l'invention, dans une installation de frittage, pour réduire la quantité de dioxines contenue dans les effluents gazeux (24), on ajoute au matériau à fritter (10), avant le frittage, un matériau (38) ayant une action catalytique sur la dégradation des dioxines, lequel se présente sous la forme de grains fins ou de poudre et est fritté avec le matériau à fritter (10). Le matériau (38) catalytiquement actif ajouté empêche la reformation de dioxines et réduit la quantité de dioxines contenues dans les effluents gazeux (24) s'écoulant à travers le matériau à fritter (10). Le matériau (38) catalytiquement actif est intégré à l'agglomérat produit à partir du matériau à fritter (10) et peut être éliminé sans danger et de façon sûre avec la scorie formée lors d'un traitement ultérieur en haut fourneau.

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