Ceramic filter and method for using same

Details Ceramic filter and method for using same Ceramic filter and method for using same

B - Operations, Transporting

22

D

39/104, 53/359

B22D 43/00 (2006.01) B01D 39/20 (2006.01) B22D 35/00 (2006.01) B22D 41/00 (2006.01) C04B 38/00 (2006.01) C21C 1/00 (2006.01) C21C 7/00 (2006.01) C22B 9/02 (2006.01)

Patent

CA 1264544

CERAMIC FILTER AND METHOD FOR USING SAME Abstract of the Disclosure A ceramic filter for filtering molten iron is dis- closed. The ceramic filter is made from a high-melting ceramic material having an open-celled foam structure, a variable bulk density in different portions of the filter, and at least one afflux surface. In order to filter molten iron efficiently, the ratio of filter surface to filter volume should be in the range of about 0.0003 to 9 m2/cm3, the spe- cific filter resistance should be in the range of about 0.01 to 0.9 bar-cm at a flow rate of 5 m3/hour, and the pres- sure loss .DELTA. p across the filter should depend on the specific resistance? , the filter length, and the surface area of the afflux plane F in accordance with the relationship: .DELTA.p??x ?. A method for filtering molten iron using this ceramic filter is also disclosed. In this method, the ceramic filter is located near the point in the casting system where the molten iron has its greatest kinetic energy. The molten iron is first caused to flow tangentially by the afflux plane of the ceramic filter and then is deflected to create turbulence directly before the afflux plane of the filter.

474021

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