Importance

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Abstract

Method for producing direct reduced metal material (142), comprising the steps: a) charging material into a closed furnace space (120); b) filling the furnace space with heated inert gas, heating the material; c) providing a reducing gas; d) providing heat so that metal oxides present in the material are reduced, in turn causing water vapour to be formed; e) condensing and collecting the water vapour a condenser (160); and f) evacuating remaining reducing gas from the furnace space. The method is characterised in that the reducing gas has a lower density than the inert gas at the same pressure, and in that, in step c), the reducing gas is provided while the inert gas is still present in the furnace space, whereby the provided reducing gas as a result pushes the inert gas downwards, until the material (is entirely contained in reducing gas. The invention also relates to a system.

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First Claim