| 摘要 |
A vertical shaft furnace comprising melting chamber having upper and lower chamber, outlet means in lower chamber portion communicating with molten metal collecting means for continuosly withdrawing molten metal therefrom, a plurality of downwardly-inclined openings arranged in two vertically spaced plances and in spaced relation about the lower chamber portion, plasma arc torches arranged in said openings, means for connecting an electrical power source between torches and metal charge and means connected to torches for extending and retracting torches relative to lower chamber portion into operating positions thereof.
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