The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 22, 2011
Filed:
Jun. 08, 2007
Huibrecht Adriaan Wouters, Leiden, NL;
Andreas Ten Cate, Amsterdam, NL;
Elisabeth Maria Beunder, Alkmaar, NL;
Willem Boender, Ridderkerk, NL;
Marcellus Albertus Hogenboom, Oude Wetering, NL;
René Kieft, Beverwijk, NL;
Joost Christiaan Storm, Akersloot, NL;
Huibrecht Adriaan Wouters, Leiden, NL;
Andreas Ten Cate, Amsterdam, NL;
Elisabeth Maria Beunder, Alkmaar, NL;
Willem Boender, Ridderkerk, NL;
Marcellus Albertus Hogenboom, Oude Wetering, NL;
René Kieft, Beverwijk, NL;
Joost Christiaan Storm, Akersloot, NL;
Aleris Switzerland GmbH c/o K+P Treuhandgesellschaft, Schaffhausen, CH;
Abstract
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.