Metallurgical apparatus – Means for treating ores or for extracting metals – By means applying heat to work – e.g. – furnace
Patent
1990-07-20
1992-03-03
Kastler, III, S.
Metallurgical apparatus
Means for treating ores or for extracting metals
By means applying heat to work, e.g., furnace
432 58, C21B 110
Patent
active
050925644
ABSTRACT:
The present invention relates to a method for production of metals and/or ferro alloys by prereduction of particulate metal oxide co-current with a reducing gas. Reducing gas having a temperature between 650.degree. and 1100.degree. C. and metal oxide particles are supplied at the lower end of a substantially vertical prereduction column which comprises at least two chambers having a substantially circular cross-section, said chambers in their upper and lower ends having a decreasing cross-section and where a ringshaped member for decreasing the cross-section is arranged in the intermediate zone between the chambers. The mixture of reducing gas and prereduced metal oxide particles is collected at the top of the prereduction column, whereafter the prereduced metal oxide particles are transported to a smelting furnace for smelting and final reduction to metallix state by addition of a reduction material.
The present invention also relates to a column for treatment of particulate solid materials with a gas. The column comprises at least two chambers having a substantially circular cross-section. The chambers have in their upper and lower ends a dreasing cross-section, and a ringshaped member is arranged at least in the intermediate zone between each chamber for decreasing the cross-section in the intermediate zone.
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patent: 3923498 (1975-12-01), Volk
patent: 4042376 (1977-08-01), Collin
patent: 4060375 (1977-11-01), Weber et al.
patent: 4321032 (1982-03-01), Brice et al.
patent: 4527973 (1985-07-01), Kondoh et al.
patent: 4975116 (1990-12-01), B.ang.sen et al.
Basen Toralv
Ephithite Robin
Elkem Technology a/s
Kastler, III S.
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