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What are the classifications and materials of ceramic foam filters?

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What are the classifications and materials of ceramic foam filters?

2024-10-23

The basic materials of ceramic foam filter are silicon carbide, zirconium oxide and alumina
Foam ceramic filter has good filtration effect on copper or iron water, adopting three-dimensional structure, effectively removing oxidized mixtures and other non-metallic mixtures, blocking capture and adsorption. Whether it is gray iron, ductile iron or shaft, cylinder or complex large parts, precision casting parts filtered, product quality will be satisfactory results.
Ceramic foam filters are also suitable for copper, bronze, brass and other copper alloys, reducing copper liquid turbulence and rectifying and purifying molten steel. Particularly valuable is the significant extension of the service life of copper castings in highly demanding or harsh environments such as marine ship turbines, chemical parts, etc. It also has good results for copper castings with surface polishing requirements. Foam ceramic filters also play an important role in traditional copper manufacturing, electronic copper manufacturing and continuous casting and rolling processes. Due to the large proportion of copper and alloys, including zinc alloys, which generate greater thermal shock during the casting process, the use of silicon carbide foam amalgamated ceramic filters is generally subject to strict regulations on size.
Material
The basic material for ceramic filters is oxidized clean Zr02. zirconia filters have a heat-resistant temperature higher than about 1760°C, high strength and good high-temperature impact.
Cast steel parts are widely used where high strength and elongation are required. Therefore, cast steel parts are very sensitive to impurity-induced short-circuiting, and the excellent characteristics of foam ceramic filters can effectively remove the impurities that ultimately lead to product quality short-circuiting. Impurities are mainly composed of non-metallic particles, slag and refractory debris, which improves the surface quality and mechanical properties of castings and reduces the scrap rate.
Ceramic foam filter can make the liquid steel fill the cavity more evenly, and the molten metal has a high tendency to turbulence in the pouring process. The three-dimensional pore structure of the ceramic foam filter turbulent flow is eventually transformed into a very stable laminar flow. The laminar flow better fills the cavity, thus reducing the impact corrosion of the metal solution on the casting cavity and significantly reducing the waste rate.

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