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WO2006079353A1 - Procede de production d'un prealliage d'aluminium-scandium - Google Patents

Procede de production d'un prealliage d'aluminium-scandium Download PDF

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Publication number
WO2006079353A1
WO2006079353A1 PCT/EP2005/000692 EP2005000692W WO2006079353A1 WO 2006079353 A1 WO2006079353 A1 WO 2006079353A1 EP 2005000692 W EP2005000692 W EP 2005000692W WO 2006079353 A1 WO2006079353 A1 WO 2006079353A1
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WO
WIPO (PCT)
Prior art keywords
scandium
aluminum
salt
oxide
electrolysis
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/EP2005/000692
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German (de)
English (en)
Inventor
Pius Schwellinger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
3A Composites International AG
Original Assignee
Alcan Technology and Management Ltd
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 Alcan Technology and Management Ltd filed Critical Alcan Technology and Management Ltd
Priority to PCT/EP2005/000692 priority Critical patent/WO2006079353A1/fr
Publication of WO2006079353A1 publication Critical patent/WO2006079353A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
    • C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
    • C25C3/36—Alloys obtained by cathodic reduction of all their ions

Definitions

  • the invention relates to a process for producing an aluminum scandium master alloy by electrolysis of dissolved in a molten salt of aluminum oxide and scandium oxide or salt and common cathodic deposition of aluminum and scandium.
  • the properties of aluminum and aluminum alloys are substantially improved in the presence of scandium in a concentration greater than about 0.2 wt% Sc. Scandium increases strength, refines grain and reduces hot cracks in welds.
  • the former article describes, inter alia, the recovery of scandium oxide using the example of working up titanium production effluents as a marketable product with a purity of 99%.
  • the second mentioned article mentions, in addition to scandium oxide as further commercial products, the salts scandium fluoride, chloride, nitrate and acetate.
  • the invention has for its object to provide a method of the type mentioned, with the aluminum scandium master alloys compared to prior art methods can be made easier and cheaper.
  • the electrolysis in a cryolite melt is carried out in an electrolytic cell suitable for producing aluminum by electrolysis of aluminum oxide in a cryolite melt with the process parameters applicable to aluminum production.
  • the essential core of the invention lies in the direct production of an aluminum-scandium master alloy by a simultaneous melt-flow electrolysis of aluminum oxide and scandium oxide or salt in an electrolysis cell serving to produce aluminum.
  • scandium oxide or salt of the cryolite melt is fed to an aluminum electrolysis cell which is under production conditions. After a certain time, the cell re-equilibrates, and on the bottom of the cathode, instead of raw aluminum, an AISc alloy collects.
  • An aluminum scandium master alloy can be produced by the process according to the invention in any conventional primary aluminum production melt electrolysis cell.
  • the production of primary aluminum in a melt flow electrolysis cell is described in the Aluminum Taschenbuch, 15th Edition (1996), Aluminum-Verlag, Volume 1, pages 21 to 28.
  • the devices and process parameters mentioned there are expressly incorporated herein by reference, and the statements made in that document are to be regarded as an integral part of the present invention description.
  • the concentration of scandium in the raw aluminum can be determined by that of the cryolite melt corresponding to that for the cathodically deposited aluminum oxide. Scandium alloy predetermined concentration added amount of scandium oxide or salt can be controlled.
  • the scandium oxide or salt is added to the cryolite melt in an amount corresponding to a concentration of 1 to 3 wt.%, Preferably 1.5 to 2.5 wt.%, Of metallic scandium in the cathodically deposited AISc alloy.
  • scandium salts soluble in the cryolite melt can be used, scandium halides and in particular scandium fluoride are preferred.
  • the scandium oxide or salt can be added undiluted to the cryolite melt in pure form or mixed with aluminum oxide.
  • a mixture of scandium oxide with at least one scandium salt or a mixture of at least two scandium salts can also be added to the cryolite melt.
  • the scandium oxide or salt used for fused-salt electrolysis usually has a purity of 99% or higher. If the accompanying elements do not significantly affect both the electrolysis and the properties of an alloy made using the AlSc master alloy, a relatively impure starting material may be used.
  • Ti does not interfere with many alloying applications.
  • titanium is the main contaminant of the scandium oxide or salt for fused-salt electrolysis, less pure and therefore cheaper scandium oxide or salt can be used, ultimately leading to a further reduction in the cost of the AlSc master alloy.
  • cryolite baths various bath compositions were provided with 75 g of cryolite in 100 ml platinum crucibles.
  • the baths had the following composition:
  • the concentration of Al 2 O 3 (without correction of the aluminum oxide present in the cryolite) was 0, 2, 3, 4, 5 and 7 wt .-%.
  • the results of the solubility measurement are shown in Table 1 and in FIG.
  • the experimental results indicate that the solubility of Sc 2 Cb in baths without aluminum oxide is between 8 and 10% by weight.
  • the solubility of Sc 2 O 3 is 5.6% by weight (FIG. 1).
  • the concentration of Sc in aluminum and in the cryolite bath was determined with and without current flow.
  • the concentration of scandium in aluminum and in the cryolite bath was determined at different times after the addition of SC 2 O 3 to the cryolite melt.
  • the experiments were carried out in graphite crucibles.
  • the bath weight was 40 g. 4 g of aluminum were covered with a cryolite bath of the following composition:
  • the bath was kept in a liquid state at a temperature of 1000 ° C. for 2 or 4 hours.
  • the crucibles were subsequently quenched in water.
  • the bath samples were analyzed by emission spectroscopy as ICP (inductively coupled plasma) analysis.
  • ICP inductively coupled plasma
  • aluminum samples were analyzed by GD-MS (glow dis- charge mass spectrometry).
  • the electrolysis was carried out at 965 0 C in the presence of 490 g of aluminum, the bath weight was 4500 g.
  • the electrolysis lasted 24 h. The removal of metal samples took place at different times during the electrolysis experiment.
  • the electrolysis was carried out with a graphite anode at 0.4 A / cm 2 . After 5 h of electrolysis, the
  • Anode replaced and to avoid an anode effect were 150 g Aluminum oxide added to the bath.
  • the bath samples were analyzed by ICP analysis.
  • the analysis of the aluminum samples to determine the scan dium concentration was carried out by means of GD-MS.
  • the concentration of Sc in the aluminum during the aluminum oxide electrolysis measured 4 h and 24 h after the addition of SC2O 3 to the bath is summarized in Table 3. After 4 h, a concentration of 0.45% by weight Sc in the aluminum is observed. This value does not change after 24 hours. It seems that the balance is already reached after 4 h. The concentration of Sc in the aluminum determined by an ICP analysis is 0.69% by weight.
  • the initial concentration of 4% by weight SCjO 3 in the bath corresponds to 2.6% by weight Sc
  • the concentration of Sc in aluminum changes according to the concentration of Sc 2 O 3 in the bath. Under the chosen experimental conditions, the concentration of Sc is 3.4 to 4.2 times lower than in the bath according to the ICP analysis.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electrolytic Production Of Metals (AREA)

Abstract

Procédé de production d'un préalliage d'aluminium-scandium, selon lequel de l'aluminium et du scandium sont isolés ensemble de manière cathodique à l'aide des paramètres de processus valables pour la production de l'aluminium par électrolyse d'oxyde d'aluminium et d'oxyde ou de sel de scandium dissous dans une masse fondue de cryolite dans une cellule électrolytique adaptée pour la production d'aluminium par électrolyse d'oxyde d'aluminium dans une masse fondue de cryolite. Le procédé selon la présente invention permet la fabrication à faible coût de préalliages de AISc.
PCT/EP2005/000692 2005-01-25 2005-01-25 Procede de production d'un prealliage d'aluminium-scandium Ceased WO2006079353A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2005/000692 WO2006079353A1 (fr) 2005-01-25 2005-01-25 Procede de production d'un prealliage d'aluminium-scandium

Applications Claiming Priority (1)

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PCT/EP2005/000692 WO2006079353A1 (fr) 2005-01-25 2005-01-25 Procede de production d'un prealliage d'aluminium-scandium

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Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104746106A (zh) * 2015-04-21 2015-07-01 中南大学 一种制备铝-钪中间合金的熔盐电解方法
US9083302B2 (en) 2011-02-28 2015-07-14 Avago Technologies General Ip (Singapore) Pte. Ltd. Stacked bulk acoustic resonator comprising a bridge and an acoustic reflector along a perimeter of the resonator
US9136818B2 (en) 2011-02-28 2015-09-15 Avago Technologies General Ip (Singapore) Pte. Ltd. Stacked acoustic resonator comprising a bridge
US9148117B2 (en) 2011-02-28 2015-09-29 Avago Technologies General Ip (Singapore) Pte. Ltd. Coupled resonator filter comprising a bridge and frame elements
US9154112B2 (en) 2011-02-28 2015-10-06 Avago Technologies General Ip (Singapore) Pte. Ltd. Coupled resonator filter comprising a bridge
US9246473B2 (en) 2011-03-29 2016-01-26 Avago Technologies General Ip (Singapore) Pte. Ltd. Acoustic resonator comprising collar, frame and perimeter distributed bragg reflector
US9401692B2 (en) 2012-10-29 2016-07-26 Avago Technologies General Ip (Singapore) Pte. Ltd. Acoustic resonator having collar structure
US9425764B2 (en) 2012-10-25 2016-08-23 Avago Technologies General Ip (Singapore) Pte. Ltd. Accoustic resonator having composite electrodes with integrated lateral features
US9444426B2 (en) 2012-10-25 2016-09-13 Avago Technologies General Ip (Singapore) Pte. Ltd. Accoustic resonator having integrated lateral feature and temperature compensation feature
RU2599312C1 (ru) * 2015-03-05 2016-10-10 Федеральное государственное бюджетное учреждение науки Институт высокотемпературной электрохимии Уральского отделения Российской Академии наук Электролитический способ непрерывного получения алюминиевого сплава со скандием
US9490770B2 (en) 2011-03-29 2016-11-08 Avago Technologies General Ip (Singapore) Pte. Ltd. Acoustic resonator comprising temperature compensating layer and perimeter distributed bragg reflector
US9490418B2 (en) 2011-03-29 2016-11-08 Avago Technologies General Ip (Singapore) Pte. Ltd. Acoustic resonator comprising collar and acoustic reflector with temperature compensating layer
US9490771B2 (en) 2012-10-29 2016-11-08 Avago Technologies General Ip (Singapore) Pte. Ltd. Acoustic resonator comprising collar and frame
RU2629418C1 (ru) * 2016-09-07 2017-08-29 Федеральное государственное бюджетное учреждение науки Институт высокотемпературной электрохимии Уральского отделения Российской Академии наук Способ непрерывного получения алюминиевой лигатуры с 2 мас. % скандия
CN107532317A (zh) * 2015-04-22 2018-01-02 俄铝工程技术中心有限责任公司 生产铝钪合金的方法和实施该方法的反应器
CN107630234A (zh) * 2017-09-18 2018-01-26 江西理工大学 一种利用氯盐氧化物体系熔盐电解制备铝钪中间合金的方法
US10450634B2 (en) 2015-02-11 2019-10-22 Scandium International Mining Corporation Scandium-containing master alloys and method for making the same
US10988830B2 (en) 2018-01-16 2021-04-27 Scandium International Mining Corporation Scandium master alloy production
US11384412B2 (en) 2018-01-16 2022-07-12 Scandium International Mining Corporation Direct scandium alloying
US11970782B2 (en) 2018-03-15 2024-04-30 Fea Materials Llc Method of aluminum-scandium alloy production

Citations (1)

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Publication number Priority date Publication date Assignee Title
CN1410599A (zh) * 2002-12-03 2003-04-16 中国铝业股份有限公司 一种电解生产铝钪合金的方法

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Publication number Priority date Publication date Assignee Title
CN1410599A (zh) * 2002-12-03 2003-04-16 中国铝业股份有限公司 一种电解生产铝钪合金的方法

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DATABASE CA [online] CHEMICAL ABSTRACTS SERVICE, COLUMBUS, OHIO, US; 10 December 1998 (1998-12-10), MOSKVITIN, V. I. ET AL: "Potentials for production of aluminum- scandium alloying composition in aluminum electrolyzer", XP002333772, retrieved from STN Database accession no. 1998:772512 *
DATABASE CA [online] CHEMICAL ABSTRACTS SERVICE, COLUMBUS, OHIO, US; 27 June 2005 (2005-06-27), YANG, SHENG ET AL: "Study on mathematics model for crystallized temperature of electrolyte from nNaF.A1F3-A12O3-Sc2O3 system", XP002333771, retrieved from STN Database accession no. 2005:551742 *
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Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9083302B2 (en) 2011-02-28 2015-07-14 Avago Technologies General Ip (Singapore) Pte. Ltd. Stacked bulk acoustic resonator comprising a bridge and an acoustic reflector along a perimeter of the resonator
US9136818B2 (en) 2011-02-28 2015-09-15 Avago Technologies General Ip (Singapore) Pte. Ltd. Stacked acoustic resonator comprising a bridge
US9148117B2 (en) 2011-02-28 2015-09-29 Avago Technologies General Ip (Singapore) Pte. Ltd. Coupled resonator filter comprising a bridge and frame elements
US9154112B2 (en) 2011-02-28 2015-10-06 Avago Technologies General Ip (Singapore) Pte. Ltd. Coupled resonator filter comprising a bridge
US9490770B2 (en) 2011-03-29 2016-11-08 Avago Technologies General Ip (Singapore) Pte. Ltd. Acoustic resonator comprising temperature compensating layer and perimeter distributed bragg reflector
US9246473B2 (en) 2011-03-29 2016-01-26 Avago Technologies General Ip (Singapore) Pte. Ltd. Acoustic resonator comprising collar, frame and perimeter distributed bragg reflector
US9490418B2 (en) 2011-03-29 2016-11-08 Avago Technologies General Ip (Singapore) Pte. Ltd. Acoustic resonator comprising collar and acoustic reflector with temperature compensating layer
US9425764B2 (en) 2012-10-25 2016-08-23 Avago Technologies General Ip (Singapore) Pte. Ltd. Accoustic resonator having composite electrodes with integrated lateral features
US9444426B2 (en) 2012-10-25 2016-09-13 Avago Technologies General Ip (Singapore) Pte. Ltd. Accoustic resonator having integrated lateral feature and temperature compensation feature
US9490771B2 (en) 2012-10-29 2016-11-08 Avago Technologies General Ip (Singapore) Pte. Ltd. Acoustic resonator comprising collar and frame
US9401692B2 (en) 2012-10-29 2016-07-26 Avago Technologies General Ip (Singapore) Pte. Ltd. Acoustic resonator having collar structure
US10450634B2 (en) 2015-02-11 2019-10-22 Scandium International Mining Corporation Scandium-containing master alloys and method for making the same
RU2599312C1 (ru) * 2015-03-05 2016-10-10 Федеральное государственное бюджетное учреждение науки Институт высокотемпературной электрохимии Уральского отделения Российской Академии наук Электролитический способ непрерывного получения алюминиевого сплава со скандием
CN104746106B (zh) * 2015-04-21 2017-02-22 中南大学 一种制备铝‑钪中间合金的熔盐电解方法
CN104746106A (zh) * 2015-04-21 2015-07-01 中南大学 一种制备铝-钪中间合金的熔盐电解方法
CN107532317A (zh) * 2015-04-22 2018-01-02 俄铝工程技术中心有限责任公司 生产铝钪合金的方法和实施该方法的反应器
EP3287548A4 (fr) * 2015-04-22 2018-10-17 (Obshchestvo S Ogranichennoy Otvetstvennost'Yu "Obedinennaya Kompaniya Rusal Inzhen-Erno- Tekhnologicheskiy Tsentr) Procédé de production d'alliage aluminium-scandium et réacteur pour sa mise en oeuvre
US11186897B2 (en) 2015-04-22 2021-11-30 United Company RUSAL Engineering and Technology Centre LLC Method for producing aluminum-scandium alloy and reactor for implementing the method
RU2629418C1 (ru) * 2016-09-07 2017-08-29 Федеральное государственное бюджетное учреждение науки Институт высокотемпературной электрохимии Уральского отделения Российской Академии наук Способ непрерывного получения алюминиевой лигатуры с 2 мас. % скандия
CN107630234A (zh) * 2017-09-18 2018-01-26 江西理工大学 一种利用氯盐氧化物体系熔盐电解制备铝钪中间合金的方法
CN107630234B (zh) * 2017-09-18 2019-09-17 江西理工大学 一种利用氯盐氧化物体系熔盐电解制备铝钪中间合金的方法
US10988830B2 (en) 2018-01-16 2021-04-27 Scandium International Mining Corporation Scandium master alloy production
US11384412B2 (en) 2018-01-16 2022-07-12 Scandium International Mining Corporation Direct scandium alloying
US11970782B2 (en) 2018-03-15 2024-04-30 Fea Materials Llc Method of aluminum-scandium alloy production

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