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Patent Searching and Data


Title:
PRODUCTION OF IRON CARBIDE
Document Type and Number:
Japanese Patent JPH10237522
Kind Code:
A
Abstract:

To efficiently obtain iron carbide according to grain diameters of iron-containing raw material or progressing condition of the reaction by classifying a powdery and granular iron-containing raw material for iron-making according to the grain diameters, i.e., plural classes and reducing and carbonizing the iron-containing raw material correspondingly to each grain diameter.

The inner part of a fluidized bed type reaction vessel 7 is divided into sections 8a-8e for coarse ore and sections 9a-9d for fine ore and, in a pipe line 10 of reaction gas supplied to the sections for fine ore, a flow rate adjusting valve 1 is arranged. Fine powder in the gas exhausted from the reaction vessel 7 is collected with a cyclone 12, and the fine powder is returned back to the sections 9a-9d. Since the treating capacities of the fine powder and the coarse powder per a reaction gas passing cross sectional area of the fluidized bed type reaction vessel 7 can be equalized by adjusting a flow rate adjusting vale 11, the fine ore and the coarse ore can simultaneously be treated by using a single reaction vessel for which gas composition at its inlet is regulated to be the same. When the classification of wet iron-containing raw materials is difficult, the iron-containing raw materials are classified after preheating.


Inventors:
INOUE EIJI
MIYASHITA TORAKATSU
UCHIYAMA YOSHIO
NAKATANI JUNYA
NAKAZAWA TERUYUKI
NIO AKIO
Application Number:
JP1997000045763
Publication Date:
September 08, 1998
Filing Date:
February 28, 1997
Export Citation:
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Assignee:
KAWASAKI HEAVY IND LTD
MITSUBISHI CORP
International Classes:
C01B31/30; C21B13/00; C21B15/00; C22B5/12; C22C29/02; (IPC1-7): C21B13/00
Attorney, Agent or Firm:
Yoshihiro Tsunoda (3 others)