Method and installation for reducing orefines in a...

Details Method and installation for reducing orefines in a... Method and installation for reducing orefines in a...

2006-04-25

2006-04-25

Kastler, Scott (Department: 1742)

Specialized metallurgical processes, compositions for use therei

Processes

Producing or treating free metal

C075S447000, C075S444000

Reexamination Certificate

active

07033417

ABSTRACT:
The invention relates to the reduction of fine ores, whereby in a multi-stage gas suspension preheater the fine ores are preheated, calcined and then reduced in at least one lowest heat exchanger stage with the addition of a reducing agent in a delivered hot gas stream. The principal part of the reducing heat treatment of the fine ores is carried out in a reactor loop constructed in the lowest heat exchanger stage of the gas suspension preheater. The reactor loop has an uptake conduit section and a curved section adjoining the uptake conduit section and with which the reactor loop opens into at least one precipitating cyclone which is disposed downstream and for this purpose a hot reducing gas is introduced into the rising hot gas stream.

REFERENCES:
patent: 4207093 (1980-06-01), Pastorino et al.
patent: 4255185 (1981-03-01), Schulte et al.
patent: 4901448 (1990-02-01), Rother et al.
patent: 5560762 (1996-10-01), Bresser et al.
patent: 6277324 (2001-08-01), Joo et al.
patent: 1 160 462 (1964-01-01), None

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