Method and apparatus for production of iron from iron compounds

Specialized metallurgical processes – compositions for use therei – Processes – Producing or treating free metal

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266182, C21B 1312

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056392931

ABSTRACT:
A method and apparatus for production of iron from iron compounds is provided. There is a first stage of pre-reducing the iron compounds in a first chamber having a rotationally symmetrical wall, and a second stage of further reducing the iron compounds in a second chamber below the first chamber, fuel and oxygen being supplied to the second chamber. A reducing gas passes upwardly into the first chamber to effect the pre-reduction therein. Oxygen is fed to the first chamber. The iron compounds in the first chamber at least partly melt and then flow downwardly along the wall towards said second chamber. The iron compounds are introduced into the first chamber in particle form and by means of a carrier gas which provides one or more jets. The oxygen is fed into the first chamber at least partly in the form of one or more jets having tangential components. The velocity of introduction of the oxygen is greater than the velocity of introduction of the iron compounds in the jets thereof, while the velocity of introduction of the iron compounds is such that the particles reach the wall of the first chamber in an at least partly molten state.

REFERENCES:
patent: 2540593 (1951-02-01), Ogorzaly
patent: 3607224 (1971-09-01), Blaskowski
patent: 4087274 (1978-05-01), Edenwall et al.
patent: 5228901 (1993-07-01), Taylor et al.
J. van Langen et al, "Single Vessel Smelting Reduction Using Cyclone Pre-Reducer", Steel Times International, (1993) Mar., No. 2, Redhill, Surrey, GB.

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