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Title: Carbothermic reduction and prereduced charge for producing aluminum-silicon alloys

Abstract

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.

Inventors:
 [1];  [2]
  1. (Washington Township, Armstrong County, PA)
  2. (Murrysville, PA)
Issue Date:
Research Org.:
Aluminum Co of America
OSTI Identifier:
865300
Patent Number(s):
4491472
Application Number:
06/472,670
Assignee:
Aluminum Company of America (Pittsburgh, PA) HQPR
DOE Contract Number:  
AC01-77CS40079
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
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/

Citation Formats

Stevenson, David T., and Troup, Robert L. Carbothermic reduction and prereduced charge for producing aluminum-silicon alloys. United States: N. p., 1985. Web.
Stevenson, David T., & Troup, Robert L. Carbothermic reduction and prereduced charge for producing aluminum-silicon alloys. United States.
Stevenson, David T., and Troup, Robert L. Tue . "Carbothermic reduction and prereduced charge for producing aluminum-silicon alloys". United States. https://www.osti.gov/servlets/purl/865300.
@article{osti_865300,
title = {Carbothermic reduction and prereduced charge for producing aluminum-silicon alloys},
author = {Stevenson, David T. and Troup, Robert L.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1985},
month = {1}
}

Patent:

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