C - Chemistry – Metallurgy – 21 – B
Patent
C - Chemistry, Metallurgy
21
B
C21B 11/08 (2006.01) C21B 13/10 (2006.01) C21B 13/14 (2006.01) C21C 5/04 (2006.01) C22B 5/10 (2006.01)
Patent
CA 2661419
A hearth furnace 10 for producing metallic iron material has a furnace housing 11 having a drying/preheat zone 12, a conversion zone 13, a fusion zone 14, and optionally a cooling zone 15, the conversion zone 13 is between the drying/preheat zone 12 and the fusion zone 14. A moving hearth 20 is positioned within the furnace housing 11. A hood or separation barrier 30 within at least a portion of the conversion zone 13, fusion zone 14 or both separates the fusion zone 14 into an upper region and a lower region with the lower region adjacent the hearth 20 and the upper region adjacent the lower region and spaced from the hearth 20. An injector introduces a gaseous reductant into the lower region adjacent the hearth 20. A combustion region may be formed above the hood or separation barrier.
Bleifuss Rodney L.
Brandon Mark M.
Englund David J.
Fosnacht Donald R.
Iwasaki Iwao
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Nu-Iron Technology Llc
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