Ceramic & Foam Filters

Cellular Filters are widely used as molten metal filters in metallurgical and foundry industries. This product has the characters of excellent resistance to thermal shock, high strength, high porosity and specific surface area. With its unique straight channel honeycomb designs, it can increase the specific surface area between the molten metal and ceramic filter, thereby to improve its absorbing and capturing tiny impurities ability, & can not only reduce casting cost but also improve casting quality.

The ceramic foam filter is a tough foam made from ceramics. These are used for absorption of environmental pollutants, filtration of molten metal alloys, and as a substrate for catalysts requiring large internal surface area. These materials can be fabricated as high as 94 to 96% air by volume with temperature resistances as high as 1700 °C. Because most ceramics are already oxides or other inert compounds, there is no danger of oxidation or reduction of the material in ceramic foam filters.

Zirconia Ceramic Foam Filters are used for all types of molten steel like unalloyed, low alloyed, stainless and high-alloyed as well as Nickel and Cobalt-based super-alloys. With their excellent resistance to attack and corrosion from molten steel liquid, they can effectively remove inclusions, reduce trapped gas from liquid metal and provide laminar flow, and then the filtered metal is significantly cleaner.