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Using a specially constructed electrical furnace a mixture of hematite and coal are smelted in a continuous process, with the reduced metal accumulating at the bottom of the furnace, where it can be tapped off.
- Popular Science January 1926 p.55
- US Patent US1691272 - Method of producing metals and metal alloys low in carbon - Filed March 18, 1924 by Gustav Henning Flodin
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