Ceramic Foam Filter Ceramic Filter Plate Porous Ceramic Filter

Sic Porous ceramic foam filter plate for metal casting
Rectification Function: After placing ceramic foam filter among the casting system, the obstruction of metal liquid flow increases. The metal liquid changes its flow regime in the casting system. It can flow slowly into the casting mould cavity along the casting system. Thus it is difficult to produce vortex, making the metal liquid changed from the turbulence into laminar flow and filling the mould steadily. It also brings the casting system’s function of blocking dregs into play.Machinery Sieving: There are a large number of oxides, slag and other big pieces of impurities mixing in the metal liquid. A large amount of inclusion can be sieved through the ceramic foam filter in the mechanical method by selecting the suitable aperture for use.Filter Cake Mechanism: As the ceramic foam filter has tri-dimensional netted structure, it can block dregs high-efficiently. Many impurities that are greater than the filter hole are caught in the filter network entrance. With the inclusion quantity increasing, “filter cake”, composed of big inclusion, are formed on the surface of filter network entrance. Filter cake makes the liquid attenuated and part of the impurities, those sizes are smaller than the hole, are also caught in the “filter cake”. The network of filtering can block some bits that can’t go up. The blocked bits produce the filter function again by themselves, namely filter two-way.Absorbing Mechanism: Ceramic foam filter network has a heavy surface area, so it is good for absorbing a large amount of small particles. metal liquid is cut into tiny liquid flow unit through filter network and the contacting area between metal melting body and filter medium increases. A lot of tiny inclusions are absorbed on the filter screen as the gravitation function. This absorption relies mainly on unselected physical absorption multimolecular layer. In this way the inclusions are sieved in the network shelf layer till it blocks.For the most conventional silicon carbide ceramic foam filter, the maximum use temperature is less than 1500 ° CThe resistance for impact strength of foam ceramic filters is poor than straight channel ceramic filters, the choice of the same size filter, the suggestion is properly increasing the thickness of 50~75%.80~90% porosity of foam ceramic filter make metal liquid flow smoothly.Labyrinth channel make sand and slag is more easily blocked.
Ceramic foam filteris mainly usedfor filtration of aluminium and aluminium alloys in foundries and cast houses. With their excellent thermal shock resistanceand corrosion resistance from molten aluminum, they canZrO2
SiC
Al2O3
Colour
Yellow
Sagegreen
white
Aperture(ppi)
4~60
4~60
4~60
Cell-openingratio(%)
80~90
80~90
80~90
Operatingtemperature(°C)
1680
1500
1100
Porosity(≥%)
80
80
90
CompressionStrength(MPa)
1.5
0.8
0.7
Density(g/cm3)
0.55-0.80
0.40-0.80
0.46-0.80
ThermalShockResistance(1100-20°C)
>6times
>6times
>6times
application
steel
iron
Non-ferrous,Alumina
Non-metallic inclusions (flaws caused by impurities) in a casting are one of the most widespread causes of casting defects. They adversely effect surface finish, mechanical properties, machining characteristics and pressure tightness - and can lead to a casting being scrapped.
These filtration systems (case studies) remove inclusions, reduce turbulence and provide rapid and consistent flow. We are the professional supplier of foundry filters in the world, with the widest choice of foam and cellular filters for aluminium, copper, iron and steel casting applications.
Our application engineering teams draw on the widest experience in the world to help customers with filterselectionandoptimisationoffiltergatingsystemdesigns.