|About this Abstract
|2022 TMS Annual Meeting & Exhibition
|Late News Poster Session
|E-33: Newly Developed Ceramic Foam Filters for Filtration and Hydrogen Removal in Aluminum Casthouses
|Alexander Mach, Frank Reusch, Claus Disser, Jochen Schnelle, Marcel Rosefort, Phil Jankowski, Giuseppe Esposito
|On-Site Speaker (Planned)
In Aluminum casthouses ceramic foam filters (CFF) are the well-established technology for the reduction of inclusions in billets and rolling ingots. The removal of dissolved hydrogen in molten Aluminum in order to reduce porosity is typically done by a gas purging process using Argon or Nitrogen, possibly mixed with Chlorine. With a newly developed CFF material, it is possible to remove inclusions as well as to reduce dissolved hydrogen in the melt.
The Poster presentation will provide information on the new filter materials that have a positive impact on the hydrogen levels during the filtration process. Casting trials were performed at TRIMET (Essen, Germany) using Hycal and Leco measuring equipment to determine hydrogen concentrations. Data was collected on two casts of a 5xxx alloy with a duration of 1.5 hours per cast. Furthermore, slices from the billets were cut, prepared, and metallurgically examined for inclusions.