Alumina and Sic ceramic foam filter for metal foundry

Alumina and Sic ceramic foam filter for metal foundry
1. Introduction:

Alumina Ceramic Foam Filter are mainly used for filtration of molten aluminum and aluminum alloys in foundries and cast houses . With their excellent thermal shock resistance and corrosion resistance from molten aluminum, they can effectively eliminate inclusions, reduce trapped gas and provide laminar flow, and then the filtered metal is significantly cleaner. Cleaner metal results in higher-quality castings, less scrap, and fewer inclusion defects, all of which contribute to bottom-line profit.

SIC Ceramic Foam filters are just developed as a new type molten metal filter to decrease casting flaw in recent years. With its characteristics of light-weight, high mechanical strength, large specific surface areas, high porosity, excellent thermal shock resistance, erode resistance, high-performance, SIC Ceramic Foam filter is designed for filtering impurities from molten Iron & Alloy, nodular cast iron castings, grey iron castings and malleable castings, Bronze casting, etc. as a iron filter.

2. Size available:
7", 9", 12", 15", 17", 20", and 23", with porosities from PPI 10 to PPI 60(PPI ie pores per inch).
Other special sizes could be produced on request.

3. Material Specifications
Material ZrO2 SiC Al2O3
Color Yellow Grey Black white
Pore density (ppi) 10~60 10~60 10~60
Porosity (%) 80~90 80~90 80~90
Operating temperature(°C) 1700 1500 1100
Compression Strength(MPa) 1.2 0.9 0.8
Density(g/cm3) 0.90-1.50 0.35-0.50 0.30-0.45
Thermal Shock Resistance(1100-20°C) >6 times >6 times >6 times
Application steel iron Non-Ferrous Alloy and Aluminium

4.1 SIC Physical Properties:
Porosity(%) 80~90%
Working Temperature ≤1500°C
Bending Strength(Mpa) 0.8
Compression Strength(Mpa) 0.9
Thermal Shock Resistance 1100°C---room temperature 6 times
Volume Density 0.4-0.5g/cm3

4.2 Alumina Physical Properties:
Working ≤1200°C
Porosity 80~90%
Compression Strength
(Indoor Temperature)
≥1.0Mpa
Volume Density ≤0.5g/cm3
Thermal Shock Resistance 800°C---Indoor temperature 5 times
Application non-ferrous and alumina alloys,
high temperature gasfilter,
chemical fillings and catalysis carrier

5. Pouring Rate and Filtration Capacity

Alumina Ceramic Foam Filters
Dimensions(mm) Dimensions(inch) Pouring Rate(kg/s) Filtration Capacity(ton)
178x178x50 7x7x2 0.2-0.6 5
228x228x50 9x9x2 0.3-1.0 10
305x305x50 12x12x2 0.8-2.5 15
381x381x50 15x15x2 2.2-4.5 25
430x430x50 17x17x2 3.0-5.5 35
508x508x50 20x20x2 4.0-6.5 45
585x585x50 23x23x2 5.0-8.6 60