Ceramic Foam Filter
Ceramic foam filter is just developed as a new type molten metal filters to decrease casting flaw and also as a catalyst carrier for Air Treatment in recent years, play a vital role in the metal casting and air treatment, where they are used to filter out impurities in molten metal to improve the quality and performance of the end product or decompose organic pollutants into pollution-free water (H2O) and carbon dioxide (CO2) to meet high environmental requirements.
Alumina foam ceramic filter plate is very important to the quality of aluminum melt, which affects the subsequent processing performance and the quality of final products to a great extent.
Therefore, all countries in the world attach great importance to the purification of aluminum melt.
Parameter
Alumina foam ceramic is a kind of foam material made from high purity alumina. The foam ceramics have the characteristics of uniform porosity, high temperature resistance, heat shock resistance, wear resistance and chemical stability.
Widely used in casting processing, water treatment, chemical industry, environmental protection and other industries. It is the ideal liquid aluminum filter; Catalyst support, and good sound insulation, thermal insulation material.
Aluminium Ceramic Foam Filter Plate is special suitable for the filtration and purification of aluminum and alloy solutions with 1000 ℃.
In order to meet the increasing quality requirements of aluminum castings, the use of alumina ceramic foam filters (plates) is becoming more and more important. Filters are also widely used in ordinary sand casting, such as wet mold casting, and fixed mold casting, such as automotive aluminum parts casting.
Alumina foam ceramic filter plate is very important to the quality of aluminum melt, which affects the subsequent processing performance and the quality of final products to a great extent. Therefore, all countries in the world attach great importance to the purification of aluminum melt.
A selection range of 10ppi coarse porosity to 40ppi very fine porosity, so there will always be a product standard that suits your requirements. Both ordinary sizes and special sizes required by customers can meet the requirements.
What can Alumina Ceramic Foam Filter Plates do?
● Alumina foam ceramic filter plate can effectively remove all kinds of inclusions with fineness up to micron level in aluminum liquid, make aluminum liquid into a steady laminar flow, which is conducive to filling.
● It has a unique mullite-corundum structure, good mechanical strength and chemical stability, excellent resistance to aluminum liquid erosion performance.
● It can obtain stable filtration effect by strict control of hole size and through hole rate.
● The ceramic foam filter plate is surrounded by a sealing ceramic fiber liner, which facilitates the seal of the filter plate in the filter box to ensure that there is no metal liquid sideflow.
● A selection range of 10ppi coarse porosity to 40ppi very fine porosity.
Physical Performance Indicators
| Color | White |
| Edge Covering | Asbestos---Normal |
| Expanded Vermiculite---Superior | |
| PPI | 10/20/30/40/50/60(Customized) |
| AL2O3 Content | ≥83％ |
| Porosity | ≥85％ |
| Proportion | 0.3g/cm³-0.45g/cm³ |
| Refractory temperature | ≥1500℃ |
| Bending strength | ＞0.5Mpa |
| Thermal shock resistance | 750℃/5times |
| Solubility | Under the temperature of metal aluminum and aluminum alloy solution, the filter equipment will not chemically react with the solution and dissolve. |
| Certificate | ISO9001:2015 |
| REACH & RoHS |
Regular Size
| Dimension(mm) | Tolerance(mm) | Thickness(mm) | Rake Angle | Tortuosity(mm) | Diagonal Line | Effective Filtration Area(%) | Filtration Flow Range(Kg/min.) |
| 12"/(305*305*50) | ±3 | 50±1 | 17.5°＋1° | Max.4 | ＜1% of side length | 82 | 52-158 |
| 15"/(381*381*50) | ±3 | 50±1 | 17.5°＋1° | Max.4 | ＜1% of side length | 86 | 86-255 |
| 17"/(432*432*50) | ±3 | 50±1 | 17.5°＋1° | Max.4 | ＜1% of side length | 87 | 112-345 |
| 20"/(508*508*50) | ±4 | 50±1 | 17.5°＋1° | Max.4 | ＜1% of side length | 89 | 158-480 |
| 23"/(584*584*50) | ±4 | 50±1 | 17.5°＋1° | Max.4 | ＜1% of side length | 91 | 212-645 |
Size and shape deviation
| Item | Allowable variation | |||
| ≤381mm | 381mm～430mm | ≥430mm | ||
| Side length allowable variation(mm) | ±3 | ±4 | ±5 | |
| Diagonal line allowable variation(mm) | ±5 | ±7 | ±9 | |
| Plane clearance allowable variation(mm) | ≤3 | ≤6 | ||
| Thickness allowable variation(mm) | ±2 | |||
| Side rake allowable variation(°) | ±1° | |||
Remarks: 1. Diagonal deviation refers to the difference between the lengths of two diagonals on large surface of filter plate. 2. The plane gap is to place the large surface of filter plate on platform, and measure the gap between filter plate & platform. 3. Side bevel refers to the angle between side bevel and large surface. 4. The filter plates involved in the table are all products with a theoretical thickness of 50mm & a side inclination angle 17.5°. | ||||
Quality Assessment Factor
1. Transmittance---Light transmittance refers to the effective filtering area of the foam ceramic filter plate product. The higher the transmittance, the fewer blind holes, the more effective filter holes (display holes), and the better the filtering effect.
2. Porosity---Porosity refers to the percentage of the total volume of pores in the filter plate product to the total volume of the filter plate product. The porosity determines the filtration capacity of the foam ceramic filter plate per unit volume. The larger the porosity, the greater the filtration flow of the filter plate and the stronger the filtration capacity, and vice versa.
3. Pore uniformity---Pore uniformity is used to describe the difference between the actual number of pores per 25.4mm length in the filter plate product and the theoretically required number of pores. The smaller the gap, the better the product quality. If the gap is too large, the filter plate product will reduce the retention capacity of impurities or the filtration speed of the melt is too slow, which cannot meet the individual requirements of users in production. The size of the pore uniformity mainly depends on the foam used in the production of the filter plate. The pore uniformity of the foam is good, and the pore uniformity of the filter plate is good, so the selection of the foam is extremely important.
4. Compressive strength---The higher the compressive strength, the more durable the product, the better the quality, and vice versa.
Application:
Filtration Of Molten Aluminium
Molten Aluminium Alloy
Ductile and steel alloy
Ferrous metals including grey
Copper-based alloys
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