Prereduction furnace of a smelting reduction facility of iron or

Details Prereduction furnace of a smelting reduction facility of iron or Prereduction furnace of a smelting reduction facility of iron or

1991-02-19

1992-09-22

Andrews, Melvyn J.

Metallurgical apparatus

Means for treating ores or for extracting metals

By means applying heat to work, e.g., furnace

75446, C22B 514

Patent

active

051490625

ABSTRACT:
A prereduction furnace of a smelting reduction facility of iron ore includes a fluidizing prereduction chamber installed at an upper part of the prereduction furnace wherein iron ores are fed and prereduced, a gas blowing chamber installed at a lower part of the prereduction furnace wherein a reducing gas is fed, a distributor installed between the fluidizing prereduction chamber and the gas blowing chamber, a first plurality of nozzles passing through the distributor for injecting the reducing gas in the gas blowing chamber into the fluidizing prereduction chamber, a discharge pipe for discharging prereduced iron ores installed at a bottom center portion of the fluidizing prereduction chamber and extending through the distributor, wherein a cooling fluid flows, at least two horizontally movable gas purging pipes arranged below the distributor, and a second plurality of nozzles attached to the horizontally movable gas purging pipes for injecting a purging gas to a bottom surface of the distributor to prevent clogging of lower ends of the first plurality of nozzles.

REFERENCES:
patent: 3892046 (1975-07-01), Cooke
patent: 4226830 (1980-10-01), Davis
patent: 4886246 (1989-12-01), Maeda et al.
Patent Abstracts of Japan, vol. 12, No. 117, Apr. 14, 1988, JP-A-62 241 548 (Power Reactor & Nuclear Fuel Dev) Oct. 22, 1987.

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