Metallurgical apparatus – Means for treating ores or for extracting metals – By means applying heat to work – e.g. – furnace
Patent
1980-07-21
1981-12-29
Andrews, M. J.
Metallurgical apparatus
Means for treating ores or for extracting metals
By means applying heat to work, e.g., furnace
13 9R, 13 35, 75 11, H05B 718
Patent
active
043078729
ABSTRACT:
Ore taken from the group consisting of low-grade manganese ore ferromanganese ore and chromium ore is reduced in an electric arc furnace having two melting zones divided by a barrier. Ore and a small quantity of carbon are melted in the first zone and ore and a larger proportion of carbon are melted in the second zone. The molten metal product in the first zone forms a pool below a molten layer of slag having a high content of metal above which is disposed unmelted ore and carbon. The slag layer is flowed over the barrier to the second zone for enriching a second charge of ore and carbon therein. Depending upon the type of ore being reduced, a first molten product such as iron or high-grade ferromanganese is tapped from the first zone and a second molten product such as high-grade ferromanganese, high-grade ferrochromium or silicomanganese is tapped from the second zone. The barrier may be formed of carbon covered by a surface layer of titanium carbide.
REFERENCES:
patent: 1416584 (1922-05-01), Sicard
patent: 2769706 (1956-11-01), Herneryd et al.
Andrews M. J.
Lectromelt Corporation
Wiviott Fred
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