Aluminum alloy aluminum casting filter is used to remove solid particles and inclusions in molten metal.
The ceramic foam filter is made of basic raw material alumina. Their porosity varies from 10 to 60 pores per inch (PPI). You can also choose a combination machine of 20-30ppl, and you can customize filters of different sizes according to specifications
Aluminum Casting Filter production process
1. After measuring the composition composed of ceramics, water and additives, there are two most popular methods for producing ceramic foam filters.
2. Pour the ceramic slurry under the name of the polymer sponge method to impregnate the polymer sponge. It is then burned, leaving behind the porous ceramic.
Principle of filtration
The structure of the aluminum alloy cast aluminum filter can form a unique tortuous fluid flow path, trap inclusions and clean.
Important aluminum casting filter effective porosity (that is, the porosity that effectively causes the fluid), tortuosity, specific surface area and pore size.
The filtering process also depends on the following conditions
Alloy type, grain refiner, casting speed, metal temperature, etc.
Adding a grain refiner before the filter will have a particularly adverse effect on the filtration efficiency.
Aluminum casting filters are generally considered the “best” filters for casting.
Their main advantages are: high filtration efficiency, reduced turbulence, fire resistance and corrosion resistance, suitable for the most demanding casting applications.
Deep particle filters generally have better filtration performance, but they are more difficult and expensive to operate.
Ceramic foam filter has many advantages
Ensure that the inclusions in the refining process are minimal.
Reduce turbulence in liquid metal to prevent re-oxidation.
Prevent the generation of slag and some non-metallic particles, and increase the output of castings.
Improve physical properties (tensile strength, impact strength, elongation, processability, etc.).