A method and an apparatus for producing metals and metal alloys

C - Chemistry – Metallurgy – 21 – B

Patent

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C21B 13/14 (2006.01) C22B 1/00 (2006.01) C22B 5/12 (2006.01) C22B 5/18 (2006.01)

Patent

CA 2267776

A method of producing metals and metal alloys from metal oxides is disclosed. The method comprises the steps of partially pre-reducing the metal oxides to a pre-reduction degree of at least 60 % in one or more pre-reduction stages. Thereafter, the method comprises completely reducing the metal oxides and melting the metal in a smelt reduction stage. The method is further characterised by carrying out at least one of the pre-reduction stages with one or more of natural gas, reformed natural gas, and partially reformed natural gas as a source of reductant.

L'invention se rapporte à un procédé de fabrication et de métaux et d'alliages métalliques à partir d'oxydes métalliques. Le procédé comprend les étapes suivantes: préréduction partielle des oxydes métalliques à un taux de préréduction supérieur ou égal à 60 % au cours d'une ou plusieurs étapes de préréduction; et réduction complète des oxydes métalliques et fusion du métal au cours d'une étape de réduction par fusion. Le procédé est caractérisé par le fait qu'une des étapes de préréduction au moins utilise comme agent réducteur du gaz naturel et/ou du gaz naturel reformé et/ou du gaz naturel partiellement reformé.

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