Aluminum has been widely used in industrial applications, such as transportation, packaging, automotive, aerospace, electronics. Inclusion content has long been the main quality standard for many products. As the critical application of inclusions increases, such as products with low final thickness and high surface quality, its importance continues to increase. With the further improvement of downstream customers’ product quality requirements, the purity requirements of the melt are becoming higher and higher, and higher requirements are placed on the melt purification process. The current popular Liquid Aluminum Filter is two-stage CFF filter.
The ceramic foam filter ( CFF) is a sponge-like porous ceramic product plate, it is made of alumina, chromium oxide, etc. Ceramic foam filter has a unique three-dimensional network skeleton and interpenetrating pore structure, and its thickness is about 20~60mm. PPI (pores per inch) is the number of holes per inch of length to express its specifications. The ceramic filter plate is brittle and must be cleaned carefully after installation.
AdTech Metallurgical Materials Co., Ltd has been focusing on research, development, production, and marketing of the adhesive Liquid Aluminum Filter – ceramic foam filter(CFF) for casting Since 2012. The technology of ceramic filter has been widely approved by the market, applied for producing multiple series of aluminum alloys products, such as PS baseboard for printing, canning materials, flexible packaging materials, railway vehicle, aerospace products, cables, electrical wires and other high-precision filtration and purification for casting aluminum alloy.
AdTech’s alumina ceramic foam filter is produced based on a carrier with a solid reticular structure and combined organic foam pores.
The producing procedure is as below, put the carrier into the thixotropic alumina slurry, adopt square to center correcting automatic extrusion process. So that slurry evenly deposits in foam skeleton of the carrier. After drying solidification, then the carrier will turn into the final product by roasting formed under 1180 ℃ high temperature. Filter is installed in the filter bowl for filtrating impurity in molten aluminum alloy.