C - Chemistry – Metallurgy – 21 – B
Patent
C - Chemistry, Metallurgy
21
B
39/3
C21B 15/00 (2006.01) C21B 13/14 (2006.01)
Patent
CA 1301453
ABSTRACT OF THE DISCLOSURE A metal-making apparatus is disclosed as adapted for the production of molten iron from iron ore which is in a state of particles with a wide range in size. Included are a solid-state prereduction furnace for preliminarily reducing the raw ore particles in a solid state, and a smelting reduction furnace for smelting the prereduced ore particles and reducing them in a molten state. High temperature reducing gas generated within the smelting reduction furnace is directed into the prereduction furnace and blown up through a distributor on which there is loaded a charge of the raw ore particles. The ore particles of larger size form a fluidized bed on the distributor and so are prereduced by making intimate contact with the gas. Ore particles of smaller size, on the other hand, are carried away from the fluidized bed by the waste gas and thereby prereduced while being recirculated through the prereduction furnace. Discharged from the prereduction furnace, the prereduced ore particles of larger size are recharged by gravity into the smelting reduction furnace. The prereduced ore particles of smaller size are recovered from the waste gas and pneumatically injected into the smelting reduction furnace.
582690
Kishimoto Mitsuharu
Maeda Takuya
Murakami Keikichi
Takemura Yoshihiko
Yajima Kenichi
Kawasaki Jukogyo Kabushiki Kaisha
Riches Mckenzie & Herbert Llp
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