Decarbonization process for carbothermically produced aluminum

Bruno, Marshall J.; Carkin, Gerald E.; DeYoung, David H.; Dunlap, Ronald M.

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Title: Decarbonization process for carbothermically produced aluminum

Abstract

A method of recovering aluminum is provided. An alloy melt having Al.sub.4C.sub.3 and aluminum is provided. This mixture is cooled and then a sufficient amount of a finely dispersed gas is added to the alloy melt at a temperature of about 700.degree. C. to about 900.degree. C. The aluminum recovered is a decarbonized carbothermically produced aluminum where the step of adding a sufficient amount of the finely dispersed gas effects separation of the aluminum from the Al.sub.4C.sub.3 precipitates by flotation, resulting in two phases with the Al.sub.4C.sub.3 precipitates being the upper layer and the decarbonized aluminum being the lower layer. The aluminum is then recovered from the Al.sub.4C.sub.3 precipitates through decanting.

Inventors:: Bruno, Marshall J.; Carkin, Gerald E.; DeYoung, David H.; Dunlap, Sr., Ronald M.

Issue Date:: 2015-06-30

Research Org.:: Alcon Inc., Pittsburgh, PA (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1187948

Patent Number(s):: 9068246

Application Number:: 12/334,687

Assignee:: Alcon Inc. (Pittsburgh, PA)

Patent Classifications (CPCs):: C - CHEMISTRY C22 - METALLURGY C22B - PRODUCTION AND REFINING OF METALS

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C - CHEMISTRY C22 - METALLURGY C22B - PRODUCTION AND REFINING OF METALS
C22B21/02 - with reducing {
C22B21/064 - {using inert or reactive gases
C22B5/06 - by carbides or the like

Show less

DOE Contract Number:: FC36-00ID13900

Resource Type:: Patent

Resource Relation:: Patent File Date: 2008 Dec 15

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats


                    Bruno, Marshall J., Carkin, Gerald E., DeYoung, David H., and Dunlap, Sr., Ronald M. Decarbonization process for carbothermically produced aluminum.  United States: N. p., 2015. 
        Web.

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                    Bruno, Marshall J., Carkin, Gerald E., DeYoung, David H., & Dunlap, Sr., Ronald M. Decarbonization process for carbothermically produced aluminum.  United States.

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                    Bruno, Marshall J., Carkin, Gerald E., DeYoung, David H., and Dunlap, Sr., Ronald M. Tue .  
        "Decarbonization process for carbothermically produced aluminum".  United States.  https://www.osti.gov/servlets/purl/1187948.

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@article{osti_1187948,

  title        = {Decarbonization process for carbothermically produced aluminum},

  author       = {Bruno, Marshall J. and Carkin, Gerald E. and DeYoung, David H. and Dunlap, Sr., Ronald M.},

  abstractNote = {A method of recovering aluminum is provided. An alloy melt having Al.sub.4C.sub.3 and aluminum is provided. This mixture is cooled and then a sufficient amount of a finely dispersed gas is added to the alloy melt at a temperature of about 700.degree. C. to about 900.degree. C. The aluminum recovered is a decarbonized carbothermically produced aluminum where the step of adding a sufficient amount of the finely dispersed gas effects separation of the aluminum from the Al.sub.4C.sub.3 precipitates by flotation, resulting in two phases with the Al.sub.4C.sub.3 precipitates being the upper layer and the decarbonized aluminum being the lower layer. The aluminum is then recovered from the Al.sub.4C.sub.3 precipitates through decanting.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {2015},

  month        = {6}

}

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Works referenced in this record:

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Similar Records

Title: Decarbonization process for carbothermically produced aluminum

Abstract

Citation Formats

Metallurgical process for purifying aluminum-silicon alloy patent, May 1976

Carbothermic production of aluminum patent, July 1976

Treatment of carbothermically produced aluminum patent, August 1976

Reduction of stable oxides patent, December 1979

Aluminum purification system patent, August 1980

Fractional crystallization process patent, September 1980

Production of extreme purity aluminum patent, September 1980

Production of extreme purity aluminum patent, December 1980

Silicon purification process patent, January 1981

Silicon purification method patent, March 1981

Production of extreme purity aluminum patent, June 1981

Fractional crystallization process patent, October 1981

Energy efficient production of aluminum by carbothermic reduction of alumina patent, November 1981

Method of silicon purification patent, January 1982

Silicon purification system patent, January 1982

Boron removal in silicon purification patent, January 1982

Phosphorous removal in silicon purification patent, January 1982

Slag decarbonization with a phase inversion patent, October 1983

Purification of molten aluminum using upper and lower impellers patent, August 1994

Method of gas fluxing with two rotatable dispensers patent, September 1995

Method and reactor for production of aluminum by carbothermic reduction of alumina patent, August 2002

Carbothermic aluminum production using scrap aluminum as a coolant patent, November 2002

Method for recovering aluminum vapor and aluminum suboxide from off-gases during production of aluminum by carbothermic reduction of alumina patent, March 2003

Method and reactor for production of aluminum by carbothermic reduction of alumina patent, October 2004

Method using selected carbons to react with Al2O and Al vapors in the carbothermic production of aluminum patent, February 2005

Electrode arrangement as substitute bottom for an electrothermic slag smelting furnace patent, December 2005

Device and method for treatment of gases patent, January 2007

Investigating the Viability off Carbothermic Alumina Reduction journal, November 1988

Metallurgical process for purifying aluminum-silicon alloy
patent, May 1976

Carbothermic production of aluminum
patent, July 1976

Treatment of carbothermically produced aluminum
patent, August 1976

Reduction of stable oxides
patent, December 1979

Aluminum purification system
patent, August 1980

Fractional crystallization process
patent, September 1980

Production of extreme purity aluminum
patent, September 1980

Production of extreme purity aluminum
patent, December 1980

Silicon purification process
patent, January 1981

Silicon purification method
patent, March 1981

Production of extreme purity aluminum
patent, June 1981

Fractional crystallization process
patent, October 1981

Energy efficient production of aluminum by carbothermic reduction of alumina
patent, November 1981

Method of silicon purification
patent, January 1982

Silicon purification system
patent, January 1982

Boron removal in silicon purification
patent, January 1982

Phosphorous removal in silicon purification
patent, January 1982

Slag decarbonization with a phase inversion
patent, October 1983

Purification of molten aluminum using upper and lower impellers
patent, August 1994

Method of gas fluxing with two rotatable dispensers
patent, September 1995

Method and reactor for production of aluminum by carbothermic reduction of alumina
patent, August 2002

Carbothermic aluminum production using scrap aluminum as a coolant
patent, November 2002

Method for recovering aluminum vapor and aluminum suboxide from off-gases during production of aluminum by carbothermic reduction of alumina
patent, March 2003

Method and reactor for production of aluminum by carbothermic reduction of alumina
patent, October 2004

Method using selected carbons to react with Al2O and Al vapors in the carbothermic production of aluminum
patent, February 2005

Electrode arrangement as substitute bottom for an electrothermic slag smelting furnace
patent, December 2005

Device and method for treatment of gases
patent, January 2007

Investigating the Viability off Carbothermic Alumina Reduction
journal, November 1988