In 1978, aluminum oxide, kaolin were used to produce ceramic foam filters for filtering metal melt and successfully applied to casting gate systems. In 1984, successfully developed a bubble
ceramic filters are used to filter non-ferrous metal liquids. So far, many countries have production technology and supporting production facilities.
In the early 1980s, China began to study foam ceramic filters. A ceramic foam filter for aluminum alloy, cast iron, and stainless steel was introduced in 1985. At present, China has developed a series of filters such as silicon nitride, silicon carbide, alumina, zirconia, etc. AdTech alumina ceramic foam filter is mainly used for molten aluminum filtration.
Ceramic Foam Filters for Filtering Metal Melt
As a new type of material, ceramic foam has the advantages of high porosity and large specific surface area. Large area, high strength, high-temperature resistance, which makes the application range of foam ceramics continue to consume. It is widely used in industrial sewage treatment, automobile exhaust equipment, heat and sound insulation materials, and molten metal filtration. In recent years, it has expanded to aviation, electronics, and biochemical fields.
The process of foam ceramics processing molten aluminum impurities is mainly a combination of adsorption, surface treatment filtration, and deep filtration, and deep filtration is the main process. The unique pore structure and large specific surface area of the ceramic foam filter can greatly improve the filtration efficiency and reduce the processing cost. The three-dimensional connected network structure of ceramic foam can improve efficiency. At the same time, high temperature resistance and thermal stability can ensure that it can work in complex environments.
Ceramic foam filter has high mechanical strength, chemical stability, high thermal shock resistance, and liquid metal flow shock resistance even in high-temperature environments. There is no slag or broken during processing to ensure the quality of molten metal and stable chemical composition. With large and stable metal flow, even if the molten metal contains high inclusions, it will not block the ceramic foam filter. It has high dimensional accuracy and can be automatically placed on the production line.
Ceramic Foam Filters Function
- Reduce the gas and inclusions in the casting, reduce the turbulence of the molten metal when filling the mold, reduce the surface defects in the casting, and significantly reduce the rejection rate of the casting.
- Increase the compression and sealing of the casting, increase the elongation and tensile strength of the casting, improve the surface finish of the casting, increase the fluidity of the molten metal, and increase the filling capacity and feeding capacity of the melt.
- Simplify the casting system, reduce the length of the lateral flow channel, and increase the casting output.
- Reduce processing time and tool wear and improve the surface quality of castings.