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Ceramic Foam Filter

Ceramic Foam Filter

SIC Foam Filter

SIC (silicon carbide) ceramic foam filters are developed and manufactured for the casting of all copper alloys and cast iron because of its high strength, highly resistance to chemical attack and resistance to high teperature of 1530℃.

SIC Ceramic foam filters can significantly improve the quality of cast iron parts and reduce the rejection rate.

They can also be used in continuous casting and rolling processes and can be manufactured to different sizes and thicknesses depending on the runner and pouring weight.


Silicon carbide ceramic foam filter adopts German imported polyurethane foam sponge as the carrier, the slurry which mainly contains silicon carbide is extruded into the foam sponge, and then extrude slurry, the remaining slurry coated around the foam fiber is dring, roasting and sintering at high temperature, polyurethane is decomposed by heat, foam shaped ceramic products are left, namely, silicon carbide foam ceramic filter.

SIC Ceramic Foam Filter is insulating oxide ceramics that are thermally conductive. It is produced by imported raw materials from Germany and advanced laser cutting technology.

Excellent raw materials and advanced production technology ensure quite stable dimensional tolerance of our ceramic foam filters.

SIC Ceramic Foam Filters Production Workshop

SIC Foam Filter

Quality Inspection & Strength Test

Three most important key points that make our quality always best are:

● The most advanced testing equipment and technology are adopted today in Hebei Cangchen to ensure the consistant filters quality. 

● There is a quality inspection team with rich experience and technology to keep best quality in our quality control department.

● Thanks to many years of product export and feedback information from domestic and foreign customers, we have accumulated considerable experience and expertise in quality control and improvement.

SIC Foam Filter

Filtration principle:

SIC ceramic foam filter with foam sponge three-dimensional mesh interworking structure can make the metal liquid reflect the rectification, mechanical screening, filter cake, adsorption filtration mechanism to effectively improve the purity of metal liquid, reduce scrap rate, reduce machining losses so as to improve production efficiency and reduce production costs.

These ceramic foam filters are ideal for use in the casting process of ductile iron, layered iron, malleable iron and all other high and low alloy cast-iron types. Using the unique formula and manufacturing process, SIC ceramic foam filters have the excellent thermal shock, chemical and high temperature resistance up to 1500°C. As the most advanced filter type with the higher filtration efficiency, It can effectively reduce inclusions and turbulence of molten metal, ensuring purified molten metal goes into the mould cavity with improved flow rates.

SIC Foam Filter

Main Functions:

● Purify metal molten liquid

● Simplify pouring system

● Improve the casting metallographic structure

● Reduce inclusions in castings

● Reduce the reoxidation defects of castings internal

● Reduce surface defects of castings after machining

● Improve casting qualification rate

Techinical Data Sheet

TypeSIC ceramic foam filter for iron
MaterialSilicon Carbide Powder
Work Temperature≤1500℃
ColorGray Black
PPI8/10/15/20/25/30PPI(PPI=pores per inch)
Porosity (%)80-90
SiO2 (%)50-60
Al2O3 (%)20-30
MgO (%)>10
Compressive Strength (Mpa)≥2.0 (Room temperature)
Volume Density (g/cm3)0.36-0.5
Bulk Density0.36-0.5g/cm3
Soften Temperature (℃)≥1360
Work Temperature (℃)≤1500
Thermal Shock Resistance1200℃---room temperature 6 times

Normal Specifications

Spec./mmMax.filter capacity/KgNormal flow of metal liquid Kg/s
Ductile IronGrey Cast IronDuctile IronGrey Cast Iron

SIC Ceramic Foam Filters are typically made by molding or sintering the silicon carbide particles into the desired shape and then infiltrating the pores with a polymer binder to give the foam its structural integrity. The pores of the foam can be adjusted by controlling the manufacturing process, allowing the filter to be tailored to specific filtration needs. SIC foam filters are durable and have a long service life, making them a cost-effective choice for many filtration applications.

A Corner of our factory

SIC Foam Filter

How long does the SIC Ceramic Foam Filter last?

The lifespan of a SIC Ceramic Foam Filter will depend on a variety of factors, including the specific application it is used in, the type of contaminant it is filtering, and the operating conditions of the filtration system. In general, SIC foam filters are known for their durability and long service life, and they can typically be used for extended periods of time without needing to be replaced.

To ensure the maximum service life of a SIC Ceramic Foam Filter, it is important to follow the manufacturer's recommendations for use and maintenance. This may include regular cleaning and maintaining the filter to remove accumulated contaminants, as well as replacing the filter when it becomes damaged or worn. Additionally, it is important to use the filter in a manner that is consistent with its intended design and operating parameters, as using the filter outside of its specified range may reduce its service life.

SIC Foam Filter


Filtration of Molten Steel and Alloy

Large Scale Iron Casting

All copper alloys and cast iron

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Contact Us

+86 158 3011 4065

+86 158 3011 4065

Guoruiyuan Building, ShengLi North Street, Chang'An District, Shijiazhuang City, Hebei Province, China.

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