Refractory Ceramic Filter uses three methods of adsorption, surface filtration, and depth filtration to extract the impurities carried by the aluminum melt during the casting process. A refractory Aluminum Furnace Filter is placed in the CFF filter system. Alumina ceramic foam filters are mainly used for aluminum and alloy filtration in foundries and foundries. In order to manufacture high-quality wheels, it is important that the production is free of any external or internal defects. Casting defects are related to mechanical properties and surface quality. The CFF filter system is also used in the production of low-pressure die-cast light alloy aluminum alloy wheels.
The filtering mechanism of the Refractory Ceramic Filter is mainly inertial collision, diffusion, and interception.
When the impurity particles in the fluid flow through the micropores of the porous ceramic filter element, they come into contact with the walls of the micropores due to inertia. The inertial impact is proportional to the square of the diameter of the impurity particles, and inversely proportional to the flow speed and fluid viscosity.
Due to Brownian motion, the impurity particles leave the streamline, contact the wall of the microporous channel, and are thus captured. Diffusion capture is inversely proportional to flow rate and fluid viscosity. Micropores are larger than micropores and are surface filters that can trap foreign particles.
The retention is only related to the size of the impurity particles, and has nothing to do with the flow rate and fluid viscosity. When the fluid flows through the porous ceramic filter element, the particles of the filter are larger than the pore size, and elements are trapped on the surface to form a filter cake layer, and the particles are smaller than the pore size of the porous ceramic. The leaf streamlines and the microporous wall contact due to inertia and Brownian motion. Some particles are trapped on the surface of the porous ceramic or deposited in the pores of the porous ceramic.
The refractory ceramic filter has been running for a period of time, because the internal communication of the filter element may be thickened by the particulate impurities in the fluid medium, and the surface filter cake layer will be thickened, resulting in an increase in filtration resistance. When the flow rate is reduced, it can flow back through the gas and wash with a single liquid mixture. The method can be regenerated, and the equipment is basically restored to its original state. Therefore, timing back-flushing and back-washing can greatly extend the service life of the porous ceramic filter element.