Ceramic Foam Filters have the same inherent shape as that of their basis polyester open cell foam, they are highly efficient, have an open pore and a reticulated structure with a very high volume of porosity- in excess of 90% – and very high surface area to trap inclusions. The Ceramic Foam Filters are made by impregnating the base foam media with ceramic slurry and fired at very high temperatures. During this process, the base foam media decompose away and the ceramic skeleton structure remains. In these filters the molten metal takes a tortuous path, leading to the removal of very small inclusions by attraction and adsorption to the internal ceramic pore surfaces.
The Ceramic Foam Filters are used to filter melted metals like aluminum, cast iron, copper, steel, and their alloys. These metals in their molten state contain metallic and non-metallic material.