Specialized metallurgical processes – compositions for use therei – Processes – Producing or treating free metal
Patent
1995-05-02
1997-07-15
Andrews, Melvyn
Specialized metallurgical processes, compositions for use therei
Processes
Producing or treating free metal
75501, 75502, C21B 1100
Patent
active
056478887
ABSTRACT:
A process and a smelt reduction vessel (1) for producing metals and metal alloys, in particular iron and iron alloys, from metal oxides and ores in a smelt reduction vessel. The process and the vessel are characterized in that loss of liquid and solids with waste gases (11) from the vessel are minimized by causing the waste gases, oxidizing gases (5) and entrained liquid and solids in the space in the vessel that is above the molten metal to rotate about a vertical axis of the vessel thereby forcing liquid and solids outwardly toward the wall of the vessel. This rotational motion may be caused by injecting some or all the oxidizing gases through tuyeres (4) positioned above the bath surface obliquely to a vertical plane through a vertical axis of the vessel. The vessel may have a substantially rotationally symmetrical shape at least in the space above the molten metal (2A).
REFERENCES:
patent: 4798624 (1989-01-01), Brotzmann et al.
patent: 4915731 (1990-04-01), Cooper
patent: 4976776 (1990-12-01), Elvander et al.
patent: 5051127 (1991-09-01), Hardie et al.
Andrews Barry Stuart
Batterham Robin John
Keogh John Vincent
Andrews Melvyn
CRA Services Limited
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