Operating a blast furnace with the injection of hot reducing...

C - Chemistry – Metallurgy – 21 – C

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C21C 5/32 (2006.01) C21B 5/00 (2006.01) C21B 5/06 (2006.01)

Patent

CA 1185433

ABSTRACT Hot reducing gases, mainly containing CO, H2, and optionally N2, as well as smaller quantities of H2O and CO2, are injected through some of the tuyeres. Hot air, hot superoxygenated air, recycled gas, or combustion vapour containing sufficient CO2 is injected through the other tuyeres.

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