30ppi Alumina Filter

30ppi Alumina Filter includes the size of 660x660x50, 584x584x50, 508x508x 50, 432x432x50, 381x381x50, 305x 305x50mm.

30ppi Alumina Filter is composed of many uniform and numerous micropores.
When the fluid passes through these tiny holes, suspended matter and colloidal particles are trapped on the surface of the filter medium, and the fluid passes through the microporous channel to produce various physical effects, achieving the effects of mechanical filtering, purification, diffusion, and fluidization.

The function of the ceramic foam filter: ①filter the inclusions in the molten metal; ②rectify, turbulent flow of the molten metal; the ultimate goal is to improve the quality of the castings and improve the surface defects of the castings. However, the design is unreasonable during use, resulting in worsening of casting defects.

Casting Filter is basically divided into 6 pore sizes: 10PPI, 15PPI, 20PPI, 25PPI, 30PPI, and 40PPI. The larger the number, the smaller the aperture. But in actual practice, the four types of 10PPI 20PPI 30PP 40PPI can meet the needs of customers.

Aperture selection
1. The casting: 10～25ppi
2. Semi-continuous casting: 30～60ppi
3. High-quality aluminum or sheet: 50～60ppi
4. Continuous casting and rolling: 50～60p

How to choose the correct ceramic filter for castings?

Different castings should choose different filters.
Gray iron and ductile iron castings are suitable for “silicon carbide foam ceramic filter”
Aluminum and aluminum alloy castings are suitable for “alumina foam ceramic filter”
Steel and steel alloy castings are suitable for “Zirconium Oxide Foam Ceramic Filter”

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