Carbothermic reduction and prereduced charge for producing aluminum-silicon alloys

Patent · Tue Jan 01 00:00:00 EST 1985

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

Related Subjects

carbothermic
reduction
prereduced
charge
producing
aluminum-silicon
alloys
disclosed
method
aluminum
oxide
form
alloy
including
silicon
carbide
heating
mix
carbon
combustion
reactor
elevated
temperature
sufficient
produce
accelerated
rate
provided
situ
oxygen
gas
admixing
metal-forming
prereduction
step
holding
substantially
absent
feeding
preferred
ratio
situ combustion
carbothermic reduction
oxygen gas
aluminum oxide
elevated temperature
silicon carbide
temperature sufficient
silicon oxide
aluminum alloy
producing silicon
reduction step
alloy including
silicon alloy
/75/