Direct smelting plant and process

C - Chemistry – Metallurgy – 21 – B

Patent

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Details

C21B 13/14 (2006.01) C21B 5/02 (2006.01) C21B 13/00 (2006.01) C21C 5/56 (2006.01)

Patent

CA 2541893

The present invention relates to a direct smelting plant and a direct smelting process for producing molten metal from a metalliferous feed material, such as ores, partly reduced ores, and metal-containing waste streams, the latter of which comprising the steps of (a) pretreating metalliferous feed material in a pretreatment unit and producing pretreated feed material having a temperature of at least 200~C, (b) storing pretreated metalliferous feed material having a temperature of at least 200~C under pressure in a hot feed material storage means, (c) transferring pretreated metalliferous feed material having a temperature of at least 200~C under pressure in a hot feed material transfer line to a solids delivery means of a direct smelting vessel, and (d) delivering pretreated metalliferous feed material into the direct smelting vessel and smelting metalliferous feed material to molten metal in the vessel.

L'invention concerne une installation et un procédé de fusion directe qui permettent d'obtenir un métal liquide à partir d'une alimentation métallifère, telle que les minerais, les minerais partiellement réduits, ainsi que les flux de déchets métalliques. Ce procédé consiste à: (a) prétraiter l'alimentation métallifère dans une unité de prétraitement et obtenir une alimentation prétraitée chauffée à au moins 200 ·C; (b) stocker l'alimentation métallifère prétraitée chauffée à au moins 200 ·C sous pression dans des moyens de stockage d'alimentation chaude; (c) transférer l'alimentation métallifère prétraitée chauffée à au moins 200 ·C sous pression dans une ligne de transfert d'alimentation chaude vers des moyens de distribution de solides d'un convertisseur de fusion directe; et enfin, (d) injecter l'alimentation métallifère prétraitée dans le convertisseur de fusion directe et soumettre l'alimentation métallifère à une opération de fusion pour obtenir du métal fondu dans le convertisseur.

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