Method of producing reduced iron pellets

Details Method of producing reduced iron pellets Method of producing reduced iron pellets

1998-12-17

2000-11-28

Andrews, Melvyn

Specialized metallurgical processes, compositions for use therei

Processes

Producing or treating free metal

75504, 75656, 75961, 75 1031, C21B 1308, C21B 1312, C22B 1900

Patent

active

061529834

ABSTRACT:
A carbonaceous material is controlled such that the amount of carbon is from 7 to 60 mass % based on the total amount of iron and Zn in a starting mixture comprising one or more of ducts containing iron oxide and Zn oxide and a binder in an amount to bond the dusts, and water is added to prepare green pellets incorporated with the carbonaceous material. Then, dry pellets prepared by drying the thus prepared green pellets into a reduction furnace, the dry pellets are heated by heat transfer, mainly, radiation such that a temperature elevation rate is from 3 to 13.degree. C./sec within a temperature range from 150 to 900.degree. C. of the pellets, thereby reducing Zn oxide and evaporating Zn, as well as reducing iron oxide to produce reduced iron pellets.

REFERENCES:
patent: 3770416 (1973-11-01), Goksel
patent: 3836353 (1974-09-01), Holley
patent: 5186741 (1993-02-01), Kotraba et al.
patent: 5865875 (1999-02-01), Rinker et al.
Patent Abstracts of Japan, vol. 095, No. 002, Mar. 31, 1995, JP 06 330198, Nov. 29, 1994.
Patent Abstracts of Japan, vol. 097, No. 012, Dec. 25, 1997, JP 09 209047, Aug. 12, 1997.
Derwent Abstract, AN 40157W/24, JP 50-02276, Mar. 11, 1975.
Derwent Abstract, AN 44697W/27, DT 2 456 893, 1975.

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