Direct reduction process in a rotary hearth furnace

Details Direct reduction process in a rotary hearth furnace Direct reduction process in a rotary hearth furnace

1991-04-12

1993-02-16

Andrews, Melvyn J.

Specialized metallurgical processes, compositions for use therei

Processes

Producing or treating free metal

75656, 75668, 75695, 75961, C21B 1108

Patent

active

051867419

ABSTRACT:
The invented pellet reclamation process includes forming green pellets of a mixture of steel furnace dust, a carbonaceous material such as coal, charcoal, lignite, petroleum coke, or coke, and an organic binder. The green pellets are fed over a layer of burnt pellets on a rotary hearth furnace which successively conveys the pellets first through a drying and coking zone in which the pellets are dried and any volatile matter driven out of the carbonaceous material. The pellets then travel through a reduction zone where the pellets are subjected to a higher temperature at which the contained iron oxide is reduced and remains within the pellets and the zinc, lead and cadmium oxides are reduced, volatilized, re-oxidized and carried off as oxides in the waste gases. The reduced pellets (DRI) are ultimately carried into a discharge zone where they are discharged from the rotary hearth furnace. An apparatus for performing the process is also disclosed.

REFERENCES:
patent: 3836353 (1974-09-01), Holley
patent: 4251267 (1981-02-01), Beggs et al.
patent: 4701214 (1987-10-01), Kaneko et al.

Affiliated with

Also associated with

Rating

Direct reduction process in a rotary hearth furnace does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Direct reduction process in a rotary hearth furnace, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Direct reduction process in a rotary hearth furnace will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2145577