Ceramic foam filters with gasket help seat the filter in the filter box and ensure no metal bypasses the filter. There are different types of gasket available, fibre gasket, expandable gasket.
With the development of science and technology, industrial production has higher and higher requirements for the purity and quality of aluminum and its alloy materials. The traditional refining and degassing process cannot remove the fine and suspended non-metallic inclusions in the molten aluminum. Cleaner metals can produce higher quality castings, fewer scraps and fewer inclusion defects, all of which help increase profits. Therefore, people have studied many purification methods. According to their different mechanisms and forms, they can be divided into adsorption purification, physical purification and filtration purification.
Filtration purification is to make the molten metal flow through a certain medium. This medium captures the inclusions according to a certain mechanism, thereby purifying the metal. In 1978, the United States developed a new filter-ceramic foam filter, which provides a high-efficiency filter for the production of aluminum castings, and is widely used in the production of semi-continuous ingots and molded castings.
AdTech ceramic foam filters with fiber gasket can not only remove tiny scum, but also absorb micron-level inclusions because of its adsorptive properties. Because they have excellent resistance to molten aluminum erosion and corrosion, they can effectively remove inclusions, reduce trapped gas and provide laminar flow, and then the filtered metal is significantly cleaner.
Filtering efficiency is related to ceramic foam filter cell size. By carefully controlling filter cell size, a more consistent filtration performance can be achieved. Typically, removal efficiency increases as filter cell size and the metal velocity in the filter decrease.
Ceramic Foam Filters is available in all common sizes: 7″, 9″, 12″, 15″, 17″, 20″, and 23″. We offer the whole range of porosities from PPI 10 up to PPI 60 (PPI = pores per inch). Custom-made cut-to-size filters are also possible.