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US 5,009,703 AGranted
Silicon smelting process in direct current furnace
AssigneeDow Corning Corporation
InventorsArvid N. Arvidson, Vishu D. Dosaj, James B. May
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Abstract
The instant invention is a process for preparing silicon metal in a direct current, submerged-arc furnace. The process comprises adding a source of silicon dioxide and a source of carbon to a substantially closed furnace. Heat is provided to the furnace by striking a direct current arc between a moveable cathode and a anode functional hearth. Silicon metal is tapped from the furnace. The described process may also be used to prepare silicon metal alloys.
Claims15
A process for preparation of elemental silicon, the process comprising:
- (A) adding a feed mixture comprising a source of silicon dioxide and a source of carbon to a substantially closed furnace:
- (B) heating the substantially closed furnace with a direct current, submerged-arc;
- and
- (C) tapping elemental silicon from the substantially closed furnace.
1 more element
Dependencies are inferred from the claim text.