Abscheidung von nichtmetallischen Einschlüssen bei der Raffination von Aluminiumlegierungen

Abstract

Abscheidung von nichtmetallischen Einschlüssen bei der Raffination von Aluminiumlegierungen B. Prillhofer und H. AntrekowitschNichtmetallische Einschlüsse waren schon seit Beginn der Aluminiumproduktion ein zentrales Thema der Schmelzeraffination. Mit dem enormen Wachstum der Sekundäraluminiumindustrie und den damit verbundenen höheren Gehalten an Verunreinigungen hat die Entwicklung von Abscheidungsmethoden sehr an Bedeutung gewonnen. In der vorliegenden Arbeit werden jene Verfahren, welche von industrieller Relevanz sind, präsentiert, und es wird ein Ausblick auf zukünftige Raffinationsmöglichkeiten gegeben. Separation of Nonmetallic Inclusions in Aluminium AlloyRefining. Since the early years of the aluminium production, the removal of nonmetallic inclusions was a very important issue of the refining process. Due to the enormous growth of the secondary aluminium industry and the higher content of impurities of the input materials, the development of methods for inclusion removal became highly important. This article presents different processes of separation with industrial relevance and gives an outlook on future evolutions.

Removal of Iron from a Secondary Al–Si Die‐Casting Alloy by Metal Melt Filtration in a Laboratory Filtration Apparatus

“…[5,6] In secondary aluminum alloys, iron is enriched by insufficient scrap separation in the global material recycling process. [7,8] Thereby, the use of secondary aluminum alloys is significantly more energy efficient than the production of primary aluminum, which leads to an energy and CO 2 emission saving of about 95%. [9] The solubility of iron in molten aluminum is %2.5 wt% at 700 C and increases to 5.0 wt% Fe with increasing temperature (at 800 C).…”

Interaction of AlSi7Mg with Oxide Ceramics

“…Thereby, ceramic foam filters made of alumina are common filter materials which were chosen because of their good thermo-mechanical properties, but not with regards to best filtration efficiency. [1][2][3][4][5][6][7][8] During the last years, new filtering techniques and new active filter materials have been developed to expand the range of application and to improve filter efficiency. [9][10][11][12][13][14][15] Hereby, several authors supposed an influence of the wetting behavior on the filtration efficiency.…”