![\"Ceramic](\"https:\/\/aluminiumceramicfiber.com\/wp-content\/uploads\/2021\/04\/Ceramic-Foam-Filters-for-Molten-Metals.jpg\")
<\/p>\nCeramic foam filters are particularly useful for filtering molten metals, especially molten aluminum. The ceramic foam filter has the characteristics of high temperature resistance, and it does not pollute the metal in the molten metal filtration.<\/p>\n
Ceramic foam filters for molten metals are low-cost materials and can be conveniently used on a disposable basis. The molten metal is poured into the ceramic foam material at a rate of 5 to 500, preferably 30 to 100 cubic inches per minute per square inch of filtration area per minute to remove entrained solids from the molten metal. The ceramic filter provides an open-cell flexible organic foam material, surrounded by the foam material, and containing multiple interconnected voids.<\/p>\n
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The above-mentioned aqueous slurry is prepared, and the foam is impregnated with the foam material, thereby coating the fiber web with the mesh, and substantially filling the voids with it. The impregnated material is then compressed to discharge about 80% of the slurry, and the remainder is evenly distributed throughout the foam material, preferably so that some pores are blocked in a uniformly distributed manner to increase the degree of tortuosity. The compression is released so that the web remains covered by the slurry and the material is dried. The dried material is then heated to first burn out the flexible organic foam, and then the ceramic coating is sintered to provide a molten ceramic foam with multiple interconnected voids. The void is surrounded by a bonded or fused ceramic mesh in a flexible foam construction.<\/p>\n