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Patent Searching and Data


Title:
GAS BLOWING DEVICE FOR CIRCULATION FLUIDIZED REDUCTION DEVICE
Document Type and Number:
Japanese Patent JPH06180186
Kind Code:
A
Abstract:

PURPOSE: To perform uniform dispersion of reduction gas by a method wherein a solid gas separator and a downcommer are arranged in juxtaposition to a fluidized bed layer reduction furnace having a window box and the fluidized bed furnace is coupled to the window box through a gas introduction pipe in which an orifice is located.

CONSTITUTION: Reduction gas 2 is introduced as main fluidized gas in a fluidized bed reduction furnace 1, charged with an iron ore, from a window box 4 through a plurality of gas introduction pipes 3. A reduction iron ore on which fluidized reduction is applied is separated at the upper part of the furnace away from gas by means of a solid gas separator 5. The reduction ore is fed to the lower part of the furnace through a downcommer 6 as it is circulated and a part of the reduction ore is taken out through a product reduction ore discharge port 7. Through the gas introduction pipe 3 has a plurality of introduction nozzles 3-1-3-3 supported by a support late 12, in this case, an orifice 11 having a pressure loss of not less than 20% is arranged to the nozzles 3-1-3-3. This constitution causes the increase of ventilation resistance during the passage of it through a pipe, and uniform dispersion of reduction gas to the nozzles 3-1-3-3.


Inventors:
KUNITOMO KAZUYA
TAKAMOTO YASUSHI
EGASHIRA TATSUHIKO
Application Number:
JP32963892A
Publication Date:
June 28, 1994
Filing Date:
December 09, 1992
Export Citation:
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Assignee:
NIPPON STEEL CORP
International Classes:
F27B15/10; (IPC1-7): F27B15/10
Attorney, Agent or Firm:
Tachio Chanogi (1 outside)