Patents Assigned to Aleris Switzerland GmbH
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Patent number: 8313554Abstract: A method for the separation of a dispersion of molten aluminium and solid inclusions formed from a melt of aluminium containing one or more foreign chemical elements. Molten aluminium surrounding the solid inclusions is at least essentially replaced by a molten salt.Type: GrantFiled: June 20, 2007Date of Patent: November 20, 2012Assignee: Aleris Switzerland GmbHInventors: Paul Alexander De Vries, Huibrecht Adriaan Wouters, Marcellus Albertus Hogenboom
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Patent number: 7955414Abstract: A method and device for the purification and separation of purified metal from a metal mother liquid having a specific density and comprising one or more foreign element(s). The method includes: providing in a column device a starting material including metal crystals and a metal mother liquid including at least one foreign element; applying a temperature difference between a relatively hot zone at the upper end of the column and a relatively cool zone at the lower end of the column; a separation step wherein at least a part of the metal crystals is separated from the metal mother liquid by rising of the metal crystals to the upper surface of the metal mother liquid; and a further separation step wherein purified metal floating on the upper surface of the metal mother liquid is discharged from the column device.Type: GrantFiled: July 5, 2007Date of Patent: June 7, 2011Assignee: Aleris Switzerland GmbHInventors: Huibrecht Adriaan Wouters, Andreas Ten Cate, Elisabeth Maria Beunder, Willem Boender, Marcellus Albertus Hogenboom, René Kieft, Joost Christiaan Storm
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Patent number: 7892318Abstract: Method for purifying molten metal having a specific density and including one or more foreign elements to be removed, by (a) cooling the molten metal to a eutectic temperature to simultaneously form purified metal crystals and crystals including at least one foreign element, and (b) separating at least some of the purified metal crystals from the crystals including at least one foreign element by adjusting the molten metal specific density within a range delimited by a lower value being specific density of the purified metal crystals and an upper limit being specific density of the crystals including the at least one foreign element. The molten metal specific density is adjusted to this range by addition of a metal to alter the molten metal specific density and maintained within this range during separation. The method is advantageously applicable for purification of aluminium melts from recycle aluminium and aluminium scraps.Type: GrantFiled: June 8, 2007Date of Patent: February 22, 2011Assignee: Aleris Switzerland GmbH c/o K+P TreuhandgesellschaftInventors: Huibrecht Adriaan Wouters, Andreas Ten Cate, Elisabeth Maria Beunder, Willem Boender, Marcellus Albertus Hogenboom, René Kieft, Joost Christiaan Storm
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Patent number: 7648559Abstract: The invention relates to a method for fractional crystallization of an at most partially solidified molten metal, in which a layer of at most partially solidified molten metal having an upper surface and a lower surface is divided into a series of compartments communicating with each other, in which the metal is stirred in at least some of the compartments, and in which crystals formed and/or existing in the layer of metal are selectively transported in a predetermined direction and molten metal is selectively transported in the opposite direction.Type: GrantFiled: June 27, 2003Date of Patent: January 19, 2010Assignee: Aleris Switzerland GmbH c/o K+P TreuhangesellschaftInventors: Paul Alexander De Vries, Huibrecht Adriaan Wouters
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Publication number: 20090308203Abstract: A method and device for the purification and separation of purified metal from a metal mother liquid having a specific density and comprising one or more foreign element(s). The method includes: providing in a column device a starting material including metal crystals and a metal mother liquid including at least one foreign element; applying a temperature difference between a relatively hot zone at the upper end of the column and a relatively cool zone at the lower end of the column; a separation step wherein at least a part of the metal crystals is separated from the metal mother liquid by rising of the metal crystals to the upper surface of the metal mother liquid; and a further separation step wherein purified metal floating on the upper surface of the metal mother liquid is discharged from the column device.Type: ApplicationFiled: July 5, 2007Publication date: December 17, 2009Applicant: ALERIS SWITZERLAND GMBH C/O K+P TREUHANDGESELLSCHAFTInventors: Huibrecht Adriaan Wouters, Andreas Ten Cate, Elisabeth Maria Beunder, Willem Boender, Marcellus Albertus Hogenboom, Rene' Kieft, Joost Christiaan Storm
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Publication number: 20090301259Abstract: A method for the separation of a dispersion of molten aluminium and solid inclusions formed from a melt of aluminium containing one or more foreign chemical elements. Molten aluminium surrounding the solid inclusions is at least essentially replaced by a molten salt.Type: ApplicationFiled: June 20, 2007Publication date: December 10, 2009Applicant: Aleris Switzerland GMBHInventors: Paul Alexander De Vries, Huibrecht Adriaan Wouters, Marcellus Albertus Hogenboom
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Patent number: 7537639Abstract: Method of cooling an at most partially solidified molten metal during fractional crystallization wherein metal crystals formed have a purer composition than that of the molten metal. Salt in solid form is used to cool the at most partially solidified molten metal.Type: GrantFiled: November 10, 2004Date of Patent: May 26, 2009Assignee: Aleris Switzerland GmbHInventors: Paul Alexander De Vries, Huibrecht Adriaan Wouters, Martinus Leonardus Rutten, Volker Gerhard Aurich, Johannes Hendrikus Ten Have
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Patent number: 7531023Abstract: The invention relates to a method for the purification of a molten metal containing one or more foreign elements. The molten metal is cooled to a eutectic temperature to simultaneously form purified metal crystals and crystals containing at least one foreign element, and at least some of the crystals containing at least one foreign element are separated from the purified metal crystals by using a solid-solid separation technique.Type: GrantFiled: February 17, 2005Date of Patent: May 12, 2009Assignee: Aleris Switzerland GmbHInventor: Paul Alexander De Vries
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Patent number: 7442228Abstract: The invention relates to a method for controlling the proportion of aluminum crystals in a mixture of molten aluminum alloy and aluminum crystals. The electrical resistance of the mixture is determined with the aid of a four-point measurement. With the aid of the measured electrical resistance, the proportion of crystals in the mixture can be kept constant within narrow margins. The invention also relates to a device for carrying out the method.Type: GrantFiled: October 2, 2002Date of Patent: October 28, 2008Assignee: Aleris Switzerland GmbH c/o K+P TreuhangesellschaftInventor: Paul Alexander De Vries
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Patent number: 7419530Abstract: The invention relates to a method for fractional crystallization of an at most partially solidified molten metal. According to the invention a layer of at most partially solidified molten metal to be crystallized is cooled by a layer of cooling liquid, which is present above and/or below the layer of at most partially solidified molten metal so as to crystallize the molten metal.Type: GrantFiled: June 27, 2003Date of Patent: September 2, 2008Assignee: Aleris Switzerland GmbH c/o K+P TreuhangesellschaftInventors: Paul Alexander De Vries, Huibrecht Adriaan Wouters