Parallel laboratory and industrial scale aluminium filtration tests with Al2O3 and SIC based CFF filters

Abstract

Filtration experiments with Al2O3 and SiC based CFF filter types were conducted both in laboratory scale and in industrial scale. The laboratory scale set-up was designed so that melt with the same inclusion content flowed through the two filter types with the same pressure drop. The metal flow through each filter was continuously recorded during the experiments. Image analysis was used on the filter cross sections after the filtration test in order to determine difference in filtration efficiency between the two filter types. The same filter types were also tested in industrial scale experiments. LiMCA II was used to measure the inclusion content in the melt before and after the filters. A recently published method was used to calculate the removal efficiencies in the filters. Copyright © 2014 by The Minerals, Metals & Materials Society.