A QUICK-CHANGE CERAMIC FILTER ASSEMBLY FOR FILTERING MOLTEN ALUMINUM AND OTHER METALS

摘要

A new concept of a quick-change interchangeable ceramic filter assembly for filtration of molten aluminum and other metals is described. The ceramic filter cartridge assembly may be replaced without draining the molten metal filter box, and without permitting unfiltered metal to pass downstream. Oxygen/air is purged from this ceramic filter, and it is preheated before immersion into the molten metal. The purging prevents oxides from forming during priming of the filter, which would plug filter pores, and the preheating prevents thermal shocking. The filter cartridge thus can be easily interchanged without manual removal of surface oxides or corundum, and without contamination of the melt.