Title:
PRODUCTION OF REDUCED IRON PELLET AND REDUCED IRON PELLET PRODUCED BY THIS METHOD
Document Type and Number:
Japanese Patent JP3043325
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a reduced pellet having high reducing ratio and a producing method thereof which has suitable grain size and strength without containing low zinc content as harmful component as a blast furnace raw material, in dust generated in the iron works and containing iron oxide, particularly, by using the blast furnace dust and the other dust containing zinc component.
SOLUTION: Carbonaceous material is adjusted so as to become the carbon content of 7-20 mass% of the total content of iron and zinc in the mixed raw material containing one or more kinds of dusts containing the iron oxide and zinc oxide and sufficient quantity of binder to combine the dust, and moisture is added, and this raw material is granulated into green pellet including the carbonaceous material. Successively, this granulated green pellet is dried and the dried pellet is charged into the sintering furnace and heated so as to be become 3-13°C/sec temp. rising speed from 150°C to 900°C of this pellet mainly with the heat conduction of the radiation and the reduction of the zinc oxide and volatization of zinc are executed, and also the iron oxide is reduced.
Inventors:
Kazuya Miyagawa
Haruhisa Iwakiri
Shoji Jouchi
Masakata Shimizu
Tsunao Kamijo
Yoshimichi Takenaka
Haruhisa Iwakiri
Shoji Jouchi
Masakata Shimizu
Tsunao Kamijo
Yoshimichi Takenaka
Application Number:
JP35913298A
Publication Date:
May 22, 2000
Filing Date:
December 17, 1998
Export Citation:
Assignee:
KABUSHIKI KAISHA KOBE SEIKO SHO
International Classes:
C22B1/16; C21B13/10; C22B7/02; F27B17/00; (IPC1-7): C22B1/16; C21B13/10; C22B7/02; F27B17/00
Domestic Patent References:
| JP58141342A | ||||
| JP452234A | ||||
| JP4519569B1 |
Attorney, Agent or Firm:
Kan Akeda