Ceramic Foam Filter is used for melted metal or alloys filtration in foundries and cast houses to eliminating impurities.
Ceramic foam filter has the advantages of high prorosity, low loss of thermal shock, high mechanical strength at normal and high temperature, large specific surface, good chemical stability and excellent filtering functions of screen, filtering residum collection and absorption especially for tiny impurity of 1~10um.
The three-dimension structure can improve the cast quality in large scale by changing the molten metal from turbulence flow to lamellar flow, removing the gas and smoothing the casting.
It is not only applied for molten metal filtering in high temperature, but gas treatment in high temperature, carrier of catalyzer, solid heat exchange and advanced filling for chemical industry.
Ceramic foam filter are made of Alumina, Silicon carbide or Zircona, have the advantages of high porosity, low loss of thermal shock, high mechanical strength at high temperature, large specific surface, good chemical stability and excellent filtering performance.
We can supply ceramic foam filters are as follows:
1. Silicon Carbide Ceramic Foam Filter is applied to purge and filter solution of ductile iron casting, grey iron and other iron casting.
2. Zirconia Ceramic Foam Filter is applied to purge and filter solution of steel high temperature metal such as steel alloy stainless steel etc.
3. Alumina Ceramic Foam Filter is applied to purge and filter solution of aluminium and aluminium alloys.
Ceramic foam filter is just developed as a new type of molten metal filters to decrease casting flaw in recent years. It is made from high quality ceramic materials, whose main components are Al2O3, Sic, ZrO2 etc. Ceramic Foam Filter has the characters of light weight, high mechanical strength, large specific surface areas, high porosity, excellent thermal shock resistance, chemical corrosion resistance and high temperature stability in molten metal. With the distributing pores net structure, they are able to increase the surface areas, and absorb the sinter, the liquid metal becomes more pure, waster quality problems such as sand pore and air pore are much less and the cast quality becomes much better.
| Type | Alumina CFF | Silicon carbide CFF | Zirconia CFF | |
| Material | Al2O3 | Sic | ZrO2 | |
| Applied temperature | ≤1200celsius degree | ≤1500celsius degree | ≤1700celsius degree | |
| Color | White | Grey black | Yellow | |
| Bulk Density | 0.35~0.55g/cm3 | 0.45~0.65g/cm3 | 1~1.5g/cm3 | |
| Bore Density | 10~60PPI | 10~60PPI | 10~60PPI | |
| Porosity | 80~90% | 80~90% | 80~90% | |
| Bending Strength | 0.6Mpa | 0.8Mpa | 0.8-1.0Mpa | |
| Compression Strength | ≥0.8Mpa | ≥1.0Mpa | ≥1.5Mpa | |
Thermal Shock Resistance
(1100celsius degree ~ Room Temperature) | Not break after 6 times thermal shock testing |
| Application | Molten Aluminum and Alloy | Molten Iron and Alloy | Molten Stainless Steel, Alloy and other metal in precision molding | |
