The foam ceramic filter is suitable for copper alloys such as copper, bronze, brass, etc., to reduce the turbulence of the copper liquid and to rectify and purify the molten copper liquid. Particularly valuable is that the copper castings that have been purified by filtration have a significant life extension in high-demand or harsh environments such as turbines and chemical parts of marine vessels, and have good effects on cast copper parts with surface polishing requirements. Foam ceramic filters also play an important role in the traditional copper industry and the electrical and electronic copper industry and continuous casting and rolling processes. Since copper and alloys, including zinc alloys, have a greater specific gravity, they produce greater weight during casting. Thermal shock, so in the copper casting process, the use of silicon carbide foam ceramic filters generally have strict specifications.