High-Temperature Refractory Porous Al2O3 Alumina Foam Ceramic Filter Plates for Liquid Aluminum Melting Furnace Casting Metal Filtration

• Customization: Available
• Application: Aerospace, Architectural, Ceramic Decorations, Electronics, Industrial Ceramic, Nonferrous Alloy, Refractory, Structure Ceramic, Molten Metal Filtration
• Feature: Instant Materials
• Model NO.: SF-CFF
• Shape: Plate
• Product Name: Alumina Ceramic Filter Plate
• Pore Density (Ppi): 10-60
• Type: Ceramic Plates, Refractory Materials
• Operating Temperature: <1100celsius
• Porosity (%): 80-90
• Bending Strength(MPa): >1.0
• Compression Strength(MPa): >0.8
• Thermal Sgock Resistance(Times/1100): 6
• Sizes Complete: 7 Inch to 26 Inch (584*584*50 mm), 10ppi to 70ppi
• Sealing Gasket: Fiber Paper, Fiber Cotton and Expandable Cotton
• Material: Alumina Ceramic
• Transport Package: Carton with Pallet
• Specification: 1.1*1.1*0.12
• Trademark: SEFU
• Origin: China
• HS Code: 690390
• Production Capacity: 5000000PCS/Month
• Package Size: 110.00cm * 110.00cm * 210.00cm
• Package Gross Weight: 800.000kg

Product Description

Alumina Ceramic Foam Filter for Aluminum Melt Filtration

At SEFU CERAMIC, we specialize in manufacturing high-performance Alumina Ceramic Foam Filters designed to achieve superior molten aluminum purification. Our filters are engineered to efficiently remove non-metallic inclusions, oxide films, and slag, resulting in fewer casting defects, improved mechanical properties, and enhanced overall product quality for foundries and aluminum processors worldwide.

Alumina ceramic filters are mainly applied to the purification process of aluminum and aluminum alloy filters in continuous casting, half-continuous casting, gravity casting, and low-pressure casting. 

Key Features & Benefits

Exceptional Filtration Efficiency: Our unique three-dimensional network structure provides deep-bed filtration, effectively capturing coarse and fine impurities through mechanical interception and adsorption.
High Temperature & Thermal Shock Resistance: Made from high-purity alumina (A₂O₃), our filters maintain structural integrity and performance under the extreme temperatures of molten aluminum, ensuring reliability.
Optimized Flow & High Throughput: The open, interconnected pore structure (80%-90% porosity) ensures excellent metal flow rates with minimal pressure drop, supporting efficient casting operations.
Versatile Application Range: Available in various Porosity Per Inch (PPI) grades (e.g., 10, 20, 30, 40, 50, 60 PPI) to match specific filtration needs, from general casting to high-precision aerospace and automotive applications.
Enhanced Cast Quality: By reducing inclusions, our filters directly contribute to smoother surfaces, increased tensile strength, and improved elongation of final aluminum products.

How It Works: The Filtration Process

Interception: Larger inclusions are physically trapped at the filter's surface.
Deep-Bed Filtration: As molten aluminum flows through the complex internal channels, finer particles are adsorbed and captured on the ceramic pore walls.
Cake Filtration: The initial layer of captured particles further enhances the filtering of even smaller inclusions.
Flow Stabilization: The foam structure helps transform turbulent metal flow into a more laminar flow, reducing oxide formation.

Typical Applications

Our ceramic foam filters are critical in producing high-integrity aluminum components for:

Automotive Industry: Engine blocks, cylinder heads, wheels.
Aerospace & Transportation: High-strength structural castings and extrusions.
Packaging: High-quality foil and can stock.
Electrical Engineering: Conductor rods and busbars.
General Engineering & Die Casting.

Specification

Parameter	Specification / Range
Main Material	Alumina (Al2O3 ≥ 85%)
Standard PPI	10, 20, 30, 40, 50, 60
Porosity	80% - 90%
Working Temperature	Up to 1200°C (2192°F)
Standard Shape	Square Plate
Common Sizes (L×W×T)	178×178×50mm, 230×230×50mm, 305×305×50mm, 432×432×50mm, 584×584×50mm (Custom sizes available)
Color	White

Ready to Improve Your Aluminum Quality?

Contact SEFU CERAMIC today for a competitive quotation, free sample evaluation, or technical consultation. Let our filtration expertise solve your casting challenges.

FIBER COTTON EDGE

FIBER PAPER EDGE

EXPANDED COTTON EDGE

Specification (inch)	Filter Size (mm)	Remark
7 inches	178*178*50	10-30ppi continuous casting and rolling of aluminum alloy bars.  30-50ppi semi-continuous casting.  40-50ppi for high-quality aluminum profiles and plates.  50-60ppi for double zero wave continuous casting and rolling
9 inches	228*228*50
12 inches	305*305*50
15 inches	381*381*50
17 inches	432*432*50
20 inches	508*508*50
23 inches	584*584*50
26 inches	660*660*50

Company Profile

Why Choose SEFU CERAMIC?

Expert Manufacturer: We control the production process from raw materials to final sintering, ensuring consistent quality.
Customization Support: We offer tailored solutions in size, PPI, and packaging to meet your specific line requirements.
Rigorous QC: Every batch undergoes strict testing for dimensions, porosity, and high-temperature strength.
Global Supply: Reliable logistics to support your foundry operations anywhere.

Cangzhou Sefu Ceramic New Materials Co.,LTD. is a premier provider of refractory ceramics and casting materials. Our extensive product line includes ceramic filters, thermocouples, , , , , and more, catering to industries such as cast iron, steel, and aluminum.
Backed by ISO certifications and patents, our mission is to deliver superior refractory ceramics and casting materials to both domestic and international markets, striving to create more economic benefits for customers.

Packing & Delivery

Certifications

FAQ

Q1: How do I choose the right PPI for my application?

A: Lower PPI (e.g., 10-20) offers higher flow for general casting. Higher PPI (e.g., 30-60) provides finer filtration for critical, high-quality products. We can advise based on your alloy and specification.

Q2: What is the proper way to install and use the filter?

A: The filter must be securely placed in the filter box or gating system and pre-heated adequately (ideally above 600°C) to avoid thermal shock and ensure smooth metal flow. Always handle with care to avoid mechanical damage.

Q3: Can you produce filters according to our drawings?

A: Yes. We specialize in providing customized ceramic foam filters based on customer drawings and specifications.