The foam ceramic filter has the advantages of good thermal shock resistance, high porosity, high strength, good heat shock resistance, and can withstand large flow of hot metal filtration. Can be used for casting steel, can greatly reduce sand holes, slag holes, pores, inclusions and other defects, improve the surface quality of castings, improve machining performance, improve mechanical properties.
Foam ceramic filter PPI, the model is indicated by P, and the internationally common PPI is indicated, that is to say, the pore density and pore uniformity of the product. The average number of holes in a unit of square inch length. The ppi here is a relatively unique representation of the mesh of the foam ceramic filter, similar to what we usually call "mesh". Ceramic filter 10ppi and 20ppi compared to 10ppi, 10ppi aperture is larger. 10ppi means there are 10 mesh holes at a distance of one inch, and 20ppi means there are 20 mesh holes at a distance of one inch. The larger the PPI value, the smaller the hole, and the larger the value, the larger the hole.
