Ceramic foam filters are a new industrial ceramic product with low bulk density (0.25 ~ 0.65) g/cm3, high porosity (60% ~ 90%), and a three-dimensional reticulated structure. As ceramic foam has excellent properties such as high-temperature resistance, strong chemical corrosion resistance, and large surface area as a result of high porosity, it is widely used in molten metal filtration to remove undesirable nonmetallic inclusions in the melt.

Ceramic Foam Filter Molten Metal Filtration

The merits of ceramic foam filter include:

• Reduce gas and inclusions that are contained in the casting, reduce the turbulence level of molten metal when filling the mold, reduce surface defects in castings, and significantly reduce the rejection rate of casting
• Increase the compressive sealing of casting, increase elongation and tensile strength of casting, improve the surface finish of casting, improve the mobility of molten metal, and increase the filling capacity and the feeding capacity of melt.
• Simplify the casting system, reduce the length of the lateral flow channel, and improve casting yield.
• Reduce the processing time and tool abrasion, and improve the surface quality of the casting.
• Ceramic foam filter possesses high mechanical strength, chemical stability, high resistance to thermal shock, and liquid metal flow shock even under a high-temperature environment. No slag or broken in the working process, to ensure the quality and stable chemical composition of the molten metal.
• Has a large and stable metal flow, even if the high content of inclusions in molten metals, ceramic foam filters will not be plugged and have high dimensional accuracy, and can be automatically placed in the production line.