Alumina Ceramic Foam Filter

Alumina Ceramic Foam Filter

Alumina Ceramic Foam Filter

Alumina Ceramic Foam Filter is mainly for the filtration of aluminum and alloys in foundries and cast houses. With the excellent resistance to attack and corrosion from molten aluminum, the filter can effectively remove 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 the bottom-line profit.
● Reduce scrap related to inclusions
● Reduce costs related to inclusion defects
● Increase productivity with higher extrusion or rolling speeds
● Increase casting flexibility with easy alloy changes
● No holding metal

Alumina Ceramic Foam Filter

Alumina Ceramic Foam Filter


● Superior dimensional tolerances
● Stable chemical composition
● Highest filtration efficiency
● Excellent strength
● Resistant to corrosion attack by molten aluminum and alloys
● Beveled edges and compressible gasket


Filters are available in all common sizes:
7x7x2″, 9x9x2″,12x12x2″, 15x15x2″,17x17x2″, 20x20x2″, 23x23x2″.
Other sizes can be customized upon request.


±2mm(size under 15”)
±3mm mm(size above 17”)

Pore size: 10/20/30/40/50PPI
Pore Tolerance: ± 2PPI


Alumina ceramic foam filters are normally applied by placing them into a filter box. It is important to pre-heat both the filter and filter box before use. During pre-heat care must be taken to control both heat-up rate and temperature distribution. This minimizes thermal shock and stresses in the filters and filter box refractory.


Alumina Ceramic Foam Filter Priming:

Before a filter can be used, it must be completely wetted by liquid metal. This happens during the start-up of the casting operation. The amount of metallostatic pressure (or priming head) required to wet filters depends on alloy, metal temperature, pre-heat uniformity, pre-heat temperature, incoming metal quality,pre-filter treatments, and the cell size of the filter.

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