Ceramic Foam Filter -PAL

About This Project

Ceramic Foam Filters from AdTech Metallurgical Materials Co., Ltd has been focusing on research, development, production, and marketing of the adhesive Alumina Ceramic Foam Filter(CFF) for aluminum alloy casting Since 2012.

The technology of AdTech Alumina Ceramic Foam Filter has been widely approved by the market and applied for producing multiple series of aluminum alloys products, such as PS baseboard for printing, canning materials, flexible packaging materials, railway vehicle, aerospace products, cables, electrical wires and other high-precision filtration and purification for casting aluminum alloy.


Ceramic Foam Filter

Ceramic Foam Filter


Assembles for Ceramic Foam Filter:

  • Ceramic Foam Filter
  • Ceramic Fiber Sealing Gasket
  • Filter Bowl

molten filtering housing

Application for Ceramic Filter

Ceramic Filter For Foundry is produced based on the carrier with a solid reticular structure and combined organic foam pores. The production procedure is as below, put the carrier into the thixotropic alumina slurry, adopt square to center correcting automatic extrusion process, so that the slurry evenly deposits in the foam skeleton of the carrier, after drying solidification, then the carrier will turn into the final product by roasting formed under 1180 ℃ high temperature. A ceramic Foam Filter is installed in the filter bowl for filtrating impurities in molten aluminum alloy, which helps to meet the requirement of production in high value-added, high-tech performance aluminum alloy precision casting, such as computer hard drive, PS baseboard for printing, canning materials, fan blades for turbojet engine, etc.

Silicon Carbide Ceramic Foam Filter
Advantages of Ceramic Foam Filter

  • Adopt the adsorption principle for Ceramic Foam Filter, which can effectively remove big piece inclusions in molten aluminum, and effectively adsorb tiny inclusions.
  • No broken bits drop out, effectively reducing the pollution of molten aluminum.
  • Superior thermal shock resistance improves the erosion resistance ability of molten metal.
  • Automatic flow production,3 calibration procedures, precision size, fit the filter housing tightly.
  • Improve the surface appearance and performance, and purify molten aluminum.

Inspection Method for Ceramic Foam Filter

Alumina Foam Filters

Sealing gasket for Ceramic Foam Filter

The ceramic Foam Filter is surrounded by a Sealing gasket, laying between the filter and filter bowl, to prevent molten aluminum from leaking through an interface. AdTech’s filter adopts sealing gasket in 3 different types, fiber paper material, fiber cotton material, and expanding cotton material.

Photos for 3 different material Sealing gasket

Standard sizes for Ceramic Foam Filters

Dimension (± 3 mm
): 7x7in  9x9in  12x12in  15x15in  17x17in  20x20in  23x23in  26x26in
Thickness: 50 ± 2 mm
Bevel Angle: 17.5± 1.5°
Special Dimension: square, rectangular, round, trapezoidal, abnormal, or customized as per the requirement.

Technical Parameters:

Item Density
Rupture Modulus
(816℃ /Mpa)
Comprehensive Strength
Operating Temperature
Sealing gasket expanding temperature
Index 0.45 5.5 0.8-1.0 1350 450-550

Pore size for Ceramic Foam Filter:

Pores amount in any 25.4mm length filter

Mesh NumberPPI 10 20 30 40 50 60
Pore Density(PCS) 8-12 18-22 28-32 38-42 48-52 58-62

The distribution curve of pore size

adtech filter

Filtration Precision for Ceramic Foam

Pore SizePPI 20 30 40 50 60
Inclusions Diameterum 80 40 20 10 5
Filtration Rate(%) 78 85 88 92 95

Application Data for Ceramic Foam Filters

Specifications (mm) Effective filtration area() Filtration flow rangekg/min
7in(178*178*50) 75 22-56
9in(229*229*50) 75 25-80
12in(305*305*50) 80 50-156
15in(381*381*50) 85 85-252
17in(432*432*50) 86 110-335
20in(508*508*50) 88 160-478
23in(584*584*50) 89 210-640
26in(660*660*50) 90 276-830

Packing Specification for Ceramic Foam Filter Standard pallet, quantified packaging, and approximate weight

Standard Pallet, Quantitative Packaging and Weight
Filter Dimention
Filter QTY per Case
Case QTY per Pallet
QTY per Pallet
Pallet Dimension
Pallet General Weight
660x660x50(26″) 4 8 48 1100*1100*2200 490
584x584x50(23″) 5 12 60 950*950*2050 510
508x508x50(20″) 5 18 90 1100*900*1720 470
432x432x50(17″) 5 24 120 1100*1100*1670 450
381x381x50(15″) 5 24 120 1100*1100*1540 430
305x305x50(12″) 10 16 160 1000*1000*1550 350
228x228x50(9″) 10 20 200 1100*1100*1400 310
178x178x50(7″) 10 20 200 1100*1100*1400 220

Instructions for Ceramic Foam Filter

  • Inspect and clean the surface of the filter housing, keep it clean and intact.
  • Gently lay the filter in the filter housing, and press the sealing gasket around the filter by hand to prevent molten aluminum from dispersing or floating away.
  • Use electric or gas burning to preheat the filter housing and ceramic foam filter evenly for 15-30 minutes, making sure their temperature is close to molten aluminum. The preheating temperature for the ceramic foam filter should above 260℃. Expanding cotton will seal after preheating. This procedure makes the ceramic foam filter steadily fixed in molten aluminum. Preheating also leads ceramic foam filter pores to open and avoid occlusion caused by thermal expansion and contraction.
  • Observe the change of molten aluminum height, and hold molten aluminum flow in standard needs. Normal starting molten aluminum height is 100-150mm. The height falls down below 75-100mm when molten aluminum flows, and it will slowly increase later.
  • Do not hit or shake ceramic foam filter infiltration. At the same time, control the molten aluminum flow rate in the launder, never to be too much or too little.
  • Take out the ceramic foam filter and clean the filter housing in time after filtering.

Stored in a ventilated and dry environment, moisture-proof, do not lay anything on.

Filter&purification series
Alumina Ceramic Foam Filter, Alumina Foam Filters, Ceramic Filter Plate, Ceramic Foam Filter