Ferrosilicon smelting in a direct current furnace
AssigneeDow Corning Corporation
InventorsVishu D. Dosaj, James B. May
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Abstract
The present invention is a process for smelting ferrosilicon alloy. The process comprises adding a carbon source and tailings comprising oxides of silicon and iron to a substantially closed furnace. Heat is supplied to the furnace by striking a direct current arc between a cathode electrode and an anode functional hearth. In a preferred embodiment of the present invention, the cathode electrode is hollow and feed to the substantially closed furnace is through the hollow electrode.
Claims14
A process for preparation of ferrosilicon alloy, the process comprising:
- (A) adding a carbon source and tailings comprising oxides of silicon and iron to a substantially closed furnace;
- (B) heating the substantially closed furnace with a direct current arc:
- and
- (C) tapping ferrosilicon alloy from the substantially closed furnace.
A process for preparation of ferrosilicon alloy, the process comprising:
- (A) adding coke breeze and taconite tailings to a substantially closed furnace through a hollow graphite electrode.
- (B) heating the substantially closed furnace with a direct current open-arc, and
- (C) tapping ferrosilicon alloy from the substantially closed furnace.
Dependencies are inferred from the claim text.