Product Description

Alumina Ceramic Foam Filter mainly for 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 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
 

FEATURES

Superior dimensional tolerances

Stable chemical composition

Highest filtration efficiency

Excellent strength

Resistant to corrosion attack by molten aluminium and alloys

Beveled edges and compressible gasket

SPECIFICATION

Working Temp  ≤1200°C

Porosity  80-90%

Compression Strength (Room Temperature)  ≥1.0Mpa

Volume Density  0.4-0.5g/cm3

Thermal Shock Resistance  800°C to room temperature 5 times
 
 

Application

Non-ferrous and alumina alloys, high temperature gas filter,chemical fillings and catalysis carrier etc.

SIZE

Range of porosities from PPI 10 up to PPI 40 (PPI = pores per inch).

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

 

PRE-HEAT

Ceramic foam filters are normally applied by placing them into a filter box.

It is important to pre-heat both filter and bowl 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.

 

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 on the cell size of the filter.

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 on the cell size of the filter.

 

Size(mm)	Size (inch)	Effective filtration area(m2)	Weight(g)	Flow Rate Range(kg/min)	Filtration capacity(ton)	Pore size
178x178x50	7x7x2	0.02	580±40	25-60	5.0	10PPI 20PPI 30PPI 40PPI
228x228x50	9x9x2	0.03	1000±60	40-120	8.0
305x305x50	12x12x2	0.07	1780±120	90-170	15.0
381x381x50	15x15x2	0.12	2810±180	150-320	25.0
432x432x50	17x17x2	0.16	3680±210	210-500	35.0
508x508x50	20x20x2	0.23	5080±240	280-610	45.0
584x584x50	23x23x2	0.30	6720±270	370-770	60.0
*Tolerance for Filter Dimensions:±2mm *10-20PPI for pouring casting                   *30-40PPI for semi-continuous casting