Apparatus for producing sponge iron or pig iron

Details Apparatus for producing sponge iron or pig iron Apparatus for producing sponge iron or pig iron

1989-05-01

1990-09-25

Andrews, Melvyn J.

Metallurgical apparatus

With means treating or handling gases exhausted by treating...

By condensing and collecting a volatile constituent

266160, 266186, F27B 102

Patent

active

049588087

ABSTRACT:
A process for producing sponge iron from iron ore is described, which is reduced to sponge iron in a reduction shaft furnace by means of a hot reduction gas. For this purpose reduction gas at a temperature in the range 750.degree. to 900.degree. is introduced into shaft furnace (1) level with bustle plane (5) having been produced in a gasifier (2) then cooled and purified in a cyclone separator (12). Reduction gas is introduced below the bustle plane (5) at a temperature below that of the reduction gas introduced in the bustle plane and is preferably introduced into the shaft furnace (1) between 650.degree. and 750.degree.. Increased carburization of the sponge iron is obtained. Increased carbon separation also results through a volume increase, particularly by increasing the cross-section through the lower part of the shaft furnace. Carburization is also assisted in that the ratio of the reduction gas quantity supplied below the bustle plane is made as large as possible compared with the reduction gas quantity supplied in the bustle plane.

REFERENCES:
patent: 3776533 (1973-12-01), Vlnaty
patent: 4248626 (1981-02-01), Scarlett et al.
patent: 4673432 (1987-06-01), Hauk

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