Ceramic foam

Details Ceramic foam Ceramic foam

B - Operations, Transporting

01

D

39/104, 25/125

B01D 39/20 (2006.01) C04B 38/06 (2006.01) C22B 9/02 (2006.01)

Patent

CA 1252292

ABSTRACT Filter of ceramic with open cell foam structure, prepared by impregnating a polymer foam with a ceramic slurry containing a phosphate binder, expel the excess slurry, drying and firing the foam material at temperatures of 3020°F and higher, or using the same procedure employing a slurry containing a gelled aluminum hydroxide and firing at least at 2000°F. The filters resulting from this are of ceramic with open cell foam structure, the ceramic being substantially phosphate-free and the individual grains of the ceramic sintered together. The filters are suitable for filtering molten metal in particular for filtering melts of iron and steel.

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