Method for manufacturing reduced iron briquettes

Details Method for manufacturing reduced iron briquettes Method for manufacturing reduced iron briquettes

1995-10-27

1999-07-27

Jenkins, Daniel J.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Making porous product

419 25, 75765, 148660, B22F 324, C21D 118

Patent

active

059305797

ABSTRACT:
A method for manufacturing reduced iron briquettes, wherein reduced iron obtained by a direct reduction method is made into briquettes using a briquette machine, and whereafter the hot briquettes are subject to gradual cooling at a cooling rate in the range of 150.degree. C. to 250.degree. C. per minute using water spray. The reduced iron briquettes thus obtained are (a) less prone to breakage break during storage and transport; (b) less prone to degeneration into powder accompanying such breakages etc.; and (c) also display an excellent degree of metallization. Hence, the loss in weight during storage and transport can be reduced, and the harmful effects caused by dust to the transport vehicles, ships, loading/unloading equipment, and operators of the same can be reduced. Also, since the number of breakages is reduced, there is also a reduction in the amount of any re-oxidation of the reduced iron which tends to occur at newly exposed faces, whereby a product of more consistent quality can be obtained.

REFERENCES:
patent: 4179281 (1979-12-01), Ono et al.
patent: 4236699 (1980-12-01), Davis, Jr.

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