Importance

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Abstract

Method to produce hot metal in at least one blast furnace (1) including at least two levels of gas injection (3A, 3B) and emitting a blast furnace top gas (10) when working, the method including at least the steps of charging an iron-containing charge (4) and a first carbon-based reductant (5) into the blast furnace, injecting at the first level (3A) a hot blast (11) having a temperature upper or equal to 1000° C., the hot blast including oxygen (6), recovering the blast furnace top gas to extract hydrogen to produce an H2-rich stream (13) including more than 90% v of hydrogen and an H2-lean stream (12 an injecting the H2-rich stream (11) into the blast furnace at the second level of gas injection (3B). Associated network of plants.

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First Claim