Ceramic Foam Filters
Ceramic foam filters are used to filter solid particulates and slag from molten metal before it is poured into the mold. This helps reduce trapped gases, provides a smoother laminar flow, and results in cleaner metal, ensuring an even surface on the casting and a scrap-free yield.
Our foam filters are suitable for ferrous metals, molten aluminum, and copper-based alloy filtration, with a maximum temperature tolerance of 1700°C. They offer high thermal stability, with a 0% likelihood of cracking or failure. These 3-dimensional open-pore filters excel at producing molds free of oxides and inclusions.
Yield superior casting purity with a reduced scrap rate using SEFU’s ceramic foam filters. Our foam filters are custom-built in all sizes and thicknesses to suit all types of applications.
Types of Ceramic Foam Filters
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Dark grey to black filters withstand a peak thermal limit of 1500°C. These filters have a higher PPI range of 30-40, allowing them to filter more finely and catch even the smallest impurities. With excellent thermal shock resistance, silicon carbide ceramic foam filters are primarily used in casting ductile iron and gray iron.
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White filters can operate at a maximum temperature of 1100°C with molten aluminum. Ceramic foam filters can be submerged in the metal, trapping fine impurities, slag, and oxides. These filters offer strong resistance to corrosion and attacks, making them essential in aluminum and alloy production.
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Mild brown filters, used in carbon steel and cobalt-nickel-based high-temperature alloys, can withstand temperatures of up to 1700°C. Zirconia ceramic foam filters are commonly applied in in-gates and pouring cup molding to trap fine inclusions. These filters also have a low coefficient of thermal expansion and remain chemically inert at high temperatures.
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MagnesiaOff-white filters with a maximum temperature tolerance of 1200°C are designed with a pore density of 10-60 PPI, making them ideal for trapping small particles and impurities during pouring. Magnesia foam ceramic filters are lightweight, sulfur- and phosphor-free, and corrosion-resistant, primarily used in magnesium alloy filtration.
SEFU filters can be customized according to your request
SEFU filters are suitable for iron, copper, aluminum, and steel alloys, etc.
Casting filters are available for 1700°C.
We supply you ceramic filter samples
Features
- SEFU ceramic foam filter uses high-quality polyurethane sponge as a raw material to ensure that the premium quality of the filter can meet your production needs.
- The open-cell, 3D lattice structure increases the surface area, allowing for more effective trapping of non-metallic inclusions and slag particles.
- The filters can withstand temperatures of up to 1700°C without degrading or melting during the filtration process.
- Optimum porosity ensures that molten metal flows through the porous ceramic filter smoothly, without causing blockages or turbulence.
- The filtration process is consistent across all types, ensuring stability for mass production.
- Thanks to their mechanical strength, the filters can handle high-pressure operations without breaking down or shedding debris.
Application
- Non-ferrous casting
- Grey and ductile iron casting
- Sand casting
- Permanent mould casting
- Investment casting
Advantages of ceramic foam filters
- Lightweight. It can be easily integrated into existing pour basins or gating systems.
- It has good wettability and allows the metal to flow through the pores without clogging or forming barriers.
- Less tool abrasion.
- Adaptable to both horizontal and vertical placements.
- Chemical resistance to molten aluminum and other corrosive alloys.
- It offers superior thermal shock resistance and durability against erosion from the molten metal’s high velocity and abrasiveness.
Why choose SEFU?
As a leading expert in ceramic foam filter manufacturing, SEFU stays ahead of industry trends and provides efficient solutions for optimized foundry operations. Our filter foams are homogeneously structured, capable of withstanding rapid temperature changes, and consistent in size and handling. By choosing SEFU ceramic as your foam filter manufacturer, you are partnering with a company that:
- Provides customized filtration solutions
- Offers special sizes and thicknesses upon request
- Supplies free samples
- Ensures 24/7 customer support
- Adheres to packaging regulations
What Can Ceramic Foam Filters Do?
Molten metal filtration uses ceramic foam filters worldwide.
Ceramic foam has been widely used in the global foundry industry due to its characteristics of high porosity, good air permeability, large specific surface area, and high thermal shock resistance.
Ceramic foam filters in air purifiers as photocatalyst filter carriers.
Foamed ceramic carrier has been widely used in the field of air filtration and purification due to their high porosity, high temperature resistance, chemical resistance, and recycling characteristics.
Different Shaped Filters for You
Customized silicon carbide filters in different shapes according to your requirements.
As a ceramic foam filter manufacturer, SEFU produces silicon carbide ceramic foam filters in unconventional shapes and sizes according to your needs.
Customized alumina ceramic filters in different shapes according to your requirements.
As a ceramic foam filter manufacturer, SEFU produces silicon carbide ceramic foam filters in unconventional shapes and sizes according to your needs.
Customized zirconia filters in different shapes according to your requirements.
As a ceramic foam filter manufacturer, SEFU produces silicon carbide ceramic foam filters in unconventional shapes and sizes according to your needs.
Choose Your Ceramic Foam Filter
- Our Packaging
- Data Sheet
| Item | SiC Ceramic Foam Filter | Alumina Ceramic Foam Filter | Zirconia Ceramic Foam Filter |
| Color | Grey/Black | White | Yellow |
| Pore Density | 10-40 PPI | 10-40 PPI | 10-40 PPI |
| Porosity | 80%-90% | 80%-90% | 80%-90% |
| Operating Temperature | ≤1500 ℃ | ≤1100 ℃ | ≤1700 ℃ |
| Bending Strength | ≥0.8 MPa | ≥0.6 MPa | ≥1.0 MPa |
| Thermal Shock Resistance | 6 Times/1100℃ | 6 Times/1100℃ | 6 Times/1100℃ |
| Application | Ductile Iron, Gray Iron, Other Cast Iron, and Non-ferrous Alloy | Aluminum, Aluminum Alloys, and Other Non-ferrous Alloys | Stainless Steel, Carbon Steel, and Large Cast Iron |
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FAQ about Ceramic Foam Filters
Would you like to learn more about ceramic filters?
Do you have any questions about ceramic foam filters?
Let us know! Let the ceramic foam filter manufacturer answer your questions.
Define your application. Filter through SEFU’s official site based on the materials being poured, temperature resistance, filter size & shape, and pore size. If you need further assistance, feel free to contact our team, and we’ll be happy to help.
We provide a range of foam filters, with properties that change from one material to another, and so does their temperature tolerance. Filters can operate at a maximum temperature of 1700°C.
Our filters are used to remove non-metallic inclusions, such as oxides, slag, and other contaminants from molten metals.
The filters remove impurities from the molten metal, resulting in a cleaner flow. This helps initiate a laminar flow through the mold, reducing turbulence. It significantly minimizes the need for fettling work on the final products, leading to substantial cost savings.
A brand defines its value by the reputation it builds over the years. At SEFU, we’ve established our reputation in ceramic foam filter manufacturing by delivering ISO-certified products for over a decade.