WO2006026771A3 - Method using single furnace carbothermic reduction with temperature control within the furnace - Google Patents

Method using single furnace carbothermic reduction with temperature control within the furnace Download PDF

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Publication number
WO2006026771A3
WO2006026771A3 PCT/US2005/031521 US2005031521W WO2006026771A3 WO 2006026771 A3 WO2006026771 A3 WO 2006026771A3 US 2005031521 W US2005031521 W US 2005031521W WO 2006026771 A3 WO2006026771 A3 WO 2006026771A3
Authority
WO
WIPO (PCT)
Prior art keywords
furnace
slag
al2o3
phase
temperature
Prior art date
Application number
PCT/US2005/031521
Other languages
French (fr)
Other versions
WO2006026771A2 (en
Inventor
Richard J Fruehan
Original Assignee
Alcoa Inc
Elkem As
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alcoa Inc, Elkem As filed Critical Alcoa Inc
Priority to AU2005279732A priority Critical patent/AU2005279732A1/en
Priority to BRPI0514819-7A priority patent/BRPI0514819A/en
Priority to EP05794450A priority patent/EP1794333A2/en
Priority to CA002577565A priority patent/CA2577565A1/en
Priority to JP2007530444A priority patent/JP2008511760A/en
Publication of WO2006026771A2 publication Critical patent/WO2006026771A2/en
Publication of WO2006026771A3 publication Critical patent/WO2006026771A3/en
Priority to NO20070674A priority patent/NO20070674L/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B4/00—Electrothermal treatment of ores or metallurgical products for obtaining metals or alloys
    • C22B4/02—Light metals
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B21/00—Obtaining aluminium
    • C22B21/02—Obtaining aluminium with reducing
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B5/00—General methods of reducing to metals
    • C22B5/02—Dry methods smelting of sulfides or formation of mattes
    • C22B5/10—Dry methods smelting of sulfides or formation of mattes by solid carbonaceous reducing agents

Abstract

A start-up process of making aluminum using a single carbothermic reactor/furnace (11) having a single hollow reactor compartment with bottom resistance heating electrodes (16) (13) in the side of the reactor, involves adding Al2O3 and C (carbon) for start-up and melting the mixture to provide a (Al2O3-Al4C3) slag having a temperature between about 1875°C and 2000°C; and then adding Al4C3 to the slag and raising the temperature of the furnace (11) to form a top Al phase with 6 to 8 wt% C (21) and a bottom slag phase (22); and then adding Al2O3 is added to the Al-C/slag (21, 22) to produce an Al2O3 rich slag lower the reactant temperature and produce a decarbonization reaction (step 30) providing a top Al phase with less than 5 wt% C (23) which is then tapped after step (40). The remaining slag is the starting material.
PCT/US2005/031521 2004-09-01 2005-09-01 Method using single furnace carbothermic reduction with temperature control within the furnace WO2006026771A2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
AU2005279732A AU2005279732A1 (en) 2004-09-01 2005-09-01 Method using single furnace carbothermic reduction with temperature control within the furnace
BRPI0514819-7A BRPI0514819A (en) 2004-09-01 2005-09-01 method using a single temperature controlled carbothermal reduction furnace
EP05794450A EP1794333A2 (en) 2004-09-01 2005-09-01 Method using single furnace carbothermic reduction with temperature control within the furnace
CA002577565A CA2577565A1 (en) 2004-09-01 2005-09-01 Method using single furnace carbothermic reduction with temperature control within the furnace
JP2007530444A JP2008511760A (en) 2004-09-01 2005-09-01 A carbothermic reduction method using a single furnace and controlling the temperature in the furnace
NO20070674A NO20070674L (en) 2004-09-01 2007-02-06 Method of using a single carbothermal reduction furnace with temperature control in the furnace.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/932,846 2004-09-01
US10/932,846 US20060042413A1 (en) 2004-09-01 2004-09-01 Method using single furnace carbothermic reduction with temperature control within the furnace

Publications (2)

Publication Number Publication Date
WO2006026771A2 WO2006026771A2 (en) 2006-03-09
WO2006026771A3 true WO2006026771A3 (en) 2006-12-14

Family

ID=35941150

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2005/031521 WO2006026771A2 (en) 2004-09-01 2005-09-01 Method using single furnace carbothermic reduction with temperature control within the furnace

Country Status (11)

Country Link
US (1) US20060042413A1 (en)
EP (1) EP1794333A2 (en)
JP (1) JP2008511760A (en)
CN (1) CN101023190A (en)
AU (1) AU2005279732A1 (en)
BR (1) BRPI0514819A (en)
CA (1) CA2577565A1 (en)
NO (1) NO20070674L (en)
RU (1) RU2007111945A (en)
WO (1) WO2006026771A2 (en)
ZA (1) ZA200702572B (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7824468B2 (en) 2005-07-27 2010-11-02 Thermical Ip Pty Ltd. Carbothermic processes
US20080016984A1 (en) * 2006-07-20 2008-01-24 Alcoa Inc. Systems and methods for carbothermically producing aluminum
US7556667B2 (en) 2007-02-16 2009-07-07 Alcoa Inc. Low carbon aluminum production method using single furnace carbothermic reduction operated in batch mode
US7753988B2 (en) * 2007-07-09 2010-07-13 Alcoa Inc. Use of alumina-carbon agglomerates in the carbothermic production of aluminum
US7704443B2 (en) * 2007-12-04 2010-04-27 Alcoa, Inc. Carbothermic aluminum production apparatus, systems and methods
EP2288737A1 (en) * 2008-05-09 2011-03-02 Thermical IP Pty Ltd. Carbothermic processes
US9068246B2 (en) * 2008-12-15 2015-06-30 Alcon Inc. Decarbonization process for carbothermically produced aluminum
KR101105437B1 (en) * 2010-05-11 2012-01-17 (주)포스코켐텍 Method for regenerating waste MgO-C refractories
NO337267B1 (en) * 2014-02-10 2016-02-29 Elkem As Process for the production of alumina particles

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4409021A (en) * 1982-05-06 1983-10-11 Reynolds Metals Company Slag decarbonization with a phase inversion
US6440193B1 (en) * 2001-05-21 2002-08-27 Alcoa Inc. Method and reactor for production of aluminum by carbothermic reduction of alumina
US6530970B2 (en) * 2001-05-21 2003-03-11 Alcoa Inc. Method for recovering aluminum vapor and aluminum suboxide from off-gases during production of aluminum by carbothermic reduction of alumina
US6805723B2 (en) * 2003-03-06 2004-10-19 Alcoa Inc. Method and reactor for production of aluminum by carbothermic reduction of alumina

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2974032A (en) * 1960-02-24 1961-03-07 Pechiney Reduction of alumina
US4033757A (en) * 1975-09-05 1977-07-05 Reynolds Metals Company Carbothermic reduction process
GB1590431A (en) * 1976-05-28 1981-06-03 Alcan Res & Dev Process for the production of aluminium
GB1565065A (en) * 1976-08-23 1980-04-16 Tetronics Res & Dev Co Ltd Carbothermal production of aluminium
US4216010A (en) * 1979-01-31 1980-08-05 Reynolds Metals Company Aluminum purification system
US4388107A (en) * 1979-01-31 1983-06-14 Reynolds Metals Company Minimum-energy process for carbothermic reduction of alumina
US4334917A (en) * 1980-04-16 1982-06-15 Reynolds Metals Company Carbothermic reduction furnace
DE2948640C2 (en) * 1979-12-04 1984-12-20 Vereinigte Aluminium-Werke AG, 1000 Berlin und 5300 Bonn Process and device for the thermal extraction of aluminum
US4533386A (en) * 1984-03-27 1985-08-06 Process Development Associates, Inc. Process for producing aluminum
DK1147236T3 (en) * 1999-01-08 2004-06-28 Alcoa Inc Carbothermal aluminum production using scrap aluminum as a refrigerant

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4409021A (en) * 1982-05-06 1983-10-11 Reynolds Metals Company Slag decarbonization with a phase inversion
US6440193B1 (en) * 2001-05-21 2002-08-27 Alcoa Inc. Method and reactor for production of aluminum by carbothermic reduction of alumina
US6530970B2 (en) * 2001-05-21 2003-03-11 Alcoa Inc. Method for recovering aluminum vapor and aluminum suboxide from off-gases during production of aluminum by carbothermic reduction of alumina
US6805723B2 (en) * 2003-03-06 2004-10-19 Alcoa Inc. Method and reactor for production of aluminum by carbothermic reduction of alumina

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
JOHANSEN K. ET AL.: "Carbothermic Aluminum, Alcoa and Elkem's New Approach Based on Reactor Technology to Meet Process Requirements", PROCEEDINGS OF THE 6TH INTERNATIONAL CONFERENCE ON MOLTEN SLAGS, FLUXES AND SALTS, August 2000 (2000-08-01), pages 1 - 12, XP001077065 *

Also Published As

Publication number Publication date
ZA200702572B (en) 2008-09-25
NO20070674L (en) 2007-02-06
WO2006026771A2 (en) 2006-03-09
AU2005279732A1 (en) 2006-03-09
CN101023190A (en) 2007-08-22
EP1794333A2 (en) 2007-06-13
JP2008511760A (en) 2008-04-17
US20060042413A1 (en) 2006-03-02
RU2007111945A (en) 2008-10-10
CA2577565A1 (en) 2006-03-09
BRPI0514819A (en) 2008-06-24

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