Multiple-use molten metal filters

F - Mech Eng,Light,Heat,Weapons – 27 – D

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F27D 3/15 (2006.01) F27D 99/00 (2010.01) B01D 29/11 (2006.01) B22D 43/00 (2006.01) C22B 9/02 (2006.01)

Patent

CA 1264545

ABSTRACT OF THE INVENTION The present invention provides a porous ceramic molten metal filter in the form of one or more porous ceramic, close-ended, cylindrical filter body elements connected to an essentially horizontal porous ceramic sealing plate filter element and extending vertically above the elevation of that sealing plate. The assembly is susceptible of being mounted into a molten metal holding furnace or other means of molten metal transport such that the molten metal flow is introduced to the exterior of the close-ended cylindrical elements and the upper surface of the plate element. The cylindrical filter body elements rest on the sealing plate, thus the sealing plate provides all of the structural support for the assembly. The molten metal flows through the porous ceramic material of the cylindrical elements and preferably through the sealing plate element to be further flowed downstream, ultimately to the associated casting molds. Alternatively, within the scope of the present invention, a non-porous sealing plate may be used, the material of which merely needs to be sufficiently heat resistant and resistant to corrosion and dissolution by the molten metal.

493095

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