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Surface functionalized filters for aluminum melt filtration

Wednesday (24.10.2018)
19:21 - 19:24
Part of:
- Poster Battery housings for electric vehicles using CFRP and aluminium foam 0 Joachim Baumeister
- Poster Manufacturing and characterization of open-cell stainless steel foams by investment casting 1 Jan Frömert
- Poster Interface formation of Mg2X (X = Si, Sn) in cellular Si infiltrated by Mg(Sn) alloys 1 Alexander M. Matz
- Poster Production of microcellular PMMA using the bead foaming technology 1 Mikel Mugica
- Poster Nanocellular PMMA with tunable cellular structure by changing the rheological behaviour of the polymer matrix. 1 Judith Martín de León
- Poster Production of thermoplastic polyurethane foams synthesized with different contents of hard segment and graphene nanoplatelets by the gas dissolution foaming process 1 Ph.D. Mercedes Santiago-Calvo
- Poster Surface functionalized filters for aluminum melt filtration 1 Dr.-Ing. Claudia Voigt
- Poster Nanocellular polymers based on PMMA/sepiolite nanocomposites: characterization of the mechanical behaviour 1 Victoria Bernardo
- Poster Impact resistant foams based on PP/POE blends 1 Ph.D. Santiago Munoz Pascual
- Poster Crosslinked open cell ethylene butyl acrylate copolymer (EBA) foams: properties and applications 1 Ph.D. Eduardo López
- Poster Influence of molecular weight in the solubility,diffusivity and the subsequent cellular structure of polystyrene foams 1 Ph.D. Alberto Ballesteros
- Poster Crushing strength measurement at reticulated ceramic foams ex situ and in situ CT analysis 1 Dr.-Ing. Claudia Voigt
- Poster Initiation of plateau region during compression test of porous metals with aligned unidirectional pores 1 Tomoya Tamai
- Poster Active meta-materials with adjustable pore size 1 Dr. Reza Hedayati
- Poster Polymeric foams 3D numerical mechanical modelling 1 Stefano Tagliabue
- Poster Characterisation of NiTi cellular materials fabricated by the powder-metallurgy spaceholder technique 1 Dr. Karl Dahm
- Poster Accurate separation of open cell metal foams using remote laser cutting technique 1 Robert Baumann
- Poster Generation of artificial foam structures and evaluation of their thermo-mechanical, flow and filtration characteristics (Poster) 1 Christoph Settgast
- Poster Surface modification of magnesium-based foams by Directed Plasma Nanosynthesis 1 Viviana Marcela Posada Pérez

General Topic P: Postersession
Belongs to:

The recycling of secondary aluminum enjoys high priority in regard of ecologically and economically aspects. To ensure a comparable product quality of the secondary and primary aluminum appropriate and effective procedures for the removal of for example non-metallic inclusions from the molten secondary aluminum have to be applied. A simple, relatively cheap, and efficient process to reduce non-metallic inclusions is the usage of ceramic foam filters during the casting process.

The study focuses on the effect of the filter surface chemistry on the filtration behavior. Five different oxide filter surface chemistries (alumina (Al2O3), spinel (MgAl2O4), mullite (3Al2O3·2SiO2), silica (SiO2) and titanium dioxide (TiO2)) were tested with the aluminum alloy AlSi7Mg with regard to their filtration behavior.

During these trials the amount and size of the non-metallic inclusions with LiMCA (Liquid metal cleanliness analyzer) measurements were determined. This test set-up allows the simultaneous use of two LiMCAs (before and after the filter) which allows the calculation of the filtration efficiency.

The comparison of the total filtration efficiency showed the best results for the Al2O3 filter with a total efficiency of 94.5%. The TiO2 filter possesses with 85.4% the lowest filtration efficiency. The evaluation of the filtration efficiency in dependence on the inclusion size provides further insights. The Al2O3 and the MgAl2O4 filters show comparable filtration efficiency in dependence on the inclusion size. At inclusion sizes of >90 µm the filtration efficiencies are 100%.


Dr.-Ing. Claudia Voigt
TU Bergakademie Freiberg
Additional Authors:
  • Prof. Dr. Christos Aneziris
    TU Bergakademie Freiberg