High Quality Alumina Ceramic Foam Filter for Improve Casting Surface Quality

Product Description

Product Description

High-Performance Alumina Ceramic Foam Filter Plates

Our Alumina (Al2O3) Foam Ceramic Filters are a new type of highly efficient filtration material, manufactured using the unique organic foam impregnation method. They feature a high open porosity, a three-dimensional skeletal network, and a uniform pore size distribution. Primarily used in the non-ferrous metal casting industry, especially for aluminum and its alloys, these filters effectively remove oxides, inclusions, and entrapped gases from the molten metal, significantly enhancing the purity, mechanical properties, and surface quality of the final castings.

Specification

Alumina Ceramic Filter Advantages

Excellent Thermal Shock Resistance:

Maintains structural integrity and resists cracking even when subjected to the instantaneous thermal impact of high-temperature molten metal.

High Chemical Stability:

Does not chemically react with molten aluminum, ensuring zero secondary contamination during the filtration process.       

Highly Efficient Impurity Removal:

The 3D interconnected network structure utilizes multiple mechanisms—flow rectification, mechanical interception, and "filter cake" adsorption—to achieve high filtration efficiency.

Improved Casting Quality:

Effectively reduces porosity and slag inclusion defects, leading to a more uniform and dense casting structure, thus improving elongation and tensile strength.

Low Pressure Drop & High Flow Rate:

The high open porosity and interconnected pore structure ensure smooth, fast passage of the molten metal, boosting production efficiency.

Products Usage

Selection of pore size: When using a filter, the pore size of the filter (number of pores per inch of product, PPI) must be determined based on the casting material, casting size, pouring temperature, and the number of inclusions in the molten metal; The pore diameters are mainly: coarse pores (10PPI, 15PPI), intermediate pores (20PPI), and fine pores (25PPI, 30PPI). Ductile iron parts generally use 10 PPl or 15 PP products, gray iron and copper castings generally use 15 PPI or 20 PPI products, and aluminum alloy castings generally use 20 PPI or 30 PPI products.

Size selection: The greater the thickness of the foam ceramic filter, the better the strength of the filter and the higher the filtration efficiency of the filter, but the higher the cost of use. Considering the most suitable strength and filtration efficiency, the general recommendations are as follows: Size: 40MM~75MM, Thickness: 15MM~22MM Size: 75MM-120MM, Thickness: 22MM~25MM Size: 120MM~150MM, Thickness: 25MM~30MM Size: > 150MM, thickness 30MM~40MM.

Filtration capacity: The filtration capacity per unit area of the filter generally does not exceed: gray cast iron 1.5-2kg/cm², ductile iron 1-1.5kg/cm² (due to differences in casting system processes, try to design with the lower limit value to increase the insurance factor) .

Filter area: The cross-sectional area of the sprue where the filter is placed should be appropriately expanded. Generally, the cross-sectional area of the normal sprue is 2 to 4 times.

Placement location: The foam ceramic filter can be placed in various parts of the pouring system. It should be selected according to the characteristics of the parts and production conditions, and should be as close as possible to the casting to achieve the best filtration effect. In practical applications, according to different castings and requirements.

Applications

Aluminum and Aluminum Alloy Casting: Widely used for melt purification in the production of high-precision aluminum alloy castings such as profiles, plates, foils, automotive wheels, pistons, and engine blocks.

Low-Pressure and Differential Pressure Casting: Especially suitable for precision casting processes that demand high quality.

Other Non-Ferrous Metals: Can also be used for purifying zinc, magnesium, and their respective alloys.

Physical and Chemical Index
Material	Alumina/ALO	Silicon carbide/SIC	Zirconia/ZrO
Color	White	Gray	Yellow
Pore Density	8-60ppi	8-60ppi	8-60pp
Porosity	80-90%	80-90%	80-90%
Refractoriness	≤1100ºC	≤1500ºC	≤1700ºC
Flexure Strength	>0.6Mpa	>0.8Mpa	>1.0Mpa
Compressive Strength	>1Mpa	>1Mpa	>1.5Mpa
Density	0.3-0.48g/cm³	0.35-0.5g/cm³	0.9-1.5g/cm³
Resistance to Heat Shocks	6times/1100ºC	6times/1500ºC	6times/1700ºC
Application	Aluminum alloys And Others Nonferrous Metal Alloys.	Nodular Cast Iron Malleable Cast Iron Gray And Other Cast Iron	Metal Alloys with High Melting Points, Such As Steel Alloy Steel Stainless Steel

Drawings & Dimensions

Available in various shapes (square, round, etc.) and different pore sizes (PPI - Pores Per Inch), typically ranging from 10 PPI to 60 PPI, to meet diverse flow rate and filtration precision requirements.Please contact us for more information.

Company Profile

Qingdao TTWY International Trade Co., Ltd

Our company specialized in producing casting equipment. It is located in Qingdao, a beautiful harbor city, which is convenient in transportation. Especially in Refractory products, for expamle, the Quartz Crucible, Graphite crucible, Fire Assay Clay Crucible, Mullite Ceramic Crucible, Zirconia/Alumina(Al2O3) Ceramic Crucible, etc.

With high quality, reasonable price and attentive service the products produced by TTWY have wined trust from clients at home and aboard.

Packaging & Shipping

FAQ

Q1: What information should I let you know if i want to get a quotation?
A: The required material dimension (Thickness*Width*Length, diameter*length; if possible, please kindly supply us drawings).
The required more information, such as Surface Condition, Tolerance Request, The Quantity, and other mechanical and technical details.
     
If it is possible, please also provide the application of products, we will recommend the most suitable products with details for confirmation.
 
Q2: How do you gurantee the quality of the products?
A: Each step of production and finished products will be carried out inspection by QC department before storing in the warehouse. NG goods are not allowed in the completed goods warehouse.
 
Q3: Can you guarantee the prompt delivery?
A: Yes, when we get your inquiries, not only we will evaluate the more competitive price, but also we can get the most reasonable delivery time. So the prompt delivery can be guaranteed.
 
Q4: What is your lead time? 
A : It usually needs about 15- 20 days after receiving the PO. 
 
Q5: What is your payments terms?
A: T/T, L/C, Western Union, etc., could be acceptable. 
 
Q6: Can we visit your company?
A: Yes, for sure. It's my pleasure to visit our company.
 
Q7: What is the shipping cost?
A: The shipping cost is determined by the destination port, weight, packing size, total CBM of the products, we will try best to get the most reasonable shipping cost from the forwarders or express couriers to help you save more money.
 
Q8: What is the transportation way?
A: If the Gross Weight ≤45kg, it's better by express such as TNT, DHL, FedEx,, etc. 
If the Gross Weight between 45kg to 100kg, by express or by air to your nearest airport can be both considered.
If the Gross Weight ≥ 100kg, you can choose by Air or Sea to the nearest port.
 
Q9: How service you can offer your clients? 
A: We provide presales service in various forms, for example, making investment budget, manufacturing planning, etc. so that customer make a reasonable plan with less cost. Moreover, we will also provide after sale service, for example, free training about machine applications ect. 

Update Date: 2026/01/28