Ceramic foam filter plate is a new type of filter plate, which is made of Open Cell Foam Filter Materials. When the ceramic foam filter plate filters aluminum liquid, the aluminum liquid flows through the tortuous holes of the ceramic filter plate. The nonmetallic impurities and oxide film (commonly known as slag) in the liquid aluminum are trapped in the inner surface of the hole and the crack cavity of the Porous Filter Material due to the combined action of the axial pressure, friction force and surface adsorption force of the liquid aluminum, so as to separate the slag and liquid aluminum.
Open Cell Foam Filter Materials
After a period of filtering, the slag remaining on the ceramic filter also participates in the adsorption of the slag, which can play a filtering role.
Since the performance of the slag adsorbed on the ceramic filter plate and the slag to be adsorbed in the aluminum liquid are exactly the same, the surface area ratio is much larger than that of the ceramic filter plate, and the surface activity is much greater than that of the ceramic filter plate, so the ability to adsorb and trap the slag in the aluminum liquid is far Much larger than the ceramic filter plate.
Because of this, the ceramic filter plate can filter out the fine slag that is many times smaller than its own hole.
During the filtration process, the slag adsorbed on the Foam Furnace Filters gradually grows up after adsorbing and trapping the slag in the molten aluminum.
Under the agitation and scouring of the liquid flow, the extremely low-strength slag may break or fall off the ceramic filter plate.
In the process of slag falling off, if the ceramic filter plate is thicker or has small holes, it may be intercepted or adsorbed again.
Advantages of Foam Ceramic Filter
- High strength, no loose ceramic particles or powder
- Three-dimensional connected network structure, high porosity
- Large surface area is used to collect slag and large surface area is used for filtration
- Excellent thermal shock resistance
- Particles larger than pore size are captured on top of ceramic foam filters.
- Smaller particles are trapped on the filter cake by larger particles
- Fine particles are trapped in the pores of the filter