Carbothermic reduction and prereduced charge for producing aluminum-silicon alloys

Patent · Mon Dec 31 23:00:00 EST 1984

OSTI ID:865300

Stevenson, David T ^[1]; Troup, Robert L ^[2]

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1. Washington Township, Armstrong County, PA
2. Murrysville, PA

Disclosed is a method for the carbothermic reduction of aluminum oxide to form an aluminum alloy including producing silicon carbide by heating a first mix of carbon and silicon oxide in a combustion reactor to an elevated temperature sufficient to produce silicon carbide at an accelerated rate, the heating being provided by an in situ combustion with oxygen gas, and then admixing the silicon carbide with carbon and aluminum oxide to form a second mix and heating the second mix in a second reactor to an elevated metal-forming temperature sufficient to produce aluminum-silicon alloy. The prereduction step includes holding aluminum oxide substantially absent from the combustion reactor. The metal-forming step includes feeding silicon oxide in a preferred ratio with silicon carbide.

• Research Organization: Aluminum Co of America
• DOE Contract Number: AC01-77CS40079
• Assignee: Aluminum Company of America (Pittsburgh, PA)
• Patent Number(s): US 4491472
• Application Number: 06/472,670
• OSTI ID: 865300
• Country of Publication: United States
• Language: English

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