Molten aluminium casting filter adopts adsorption principle for filter, can effectively remove big piece inclusions in molten aluminum, and effectively adsorb tiny inclusions. No broken bits drop out, effectively reduce the pollution of molten aluminum. Molten aluminium casting filter is superior thermal shock resistance, improves the erosion resistance ability of molten metal.
During the melting and processing of molten aluminum, a film is usually formed on the surface of the molten metal, the film is mainly composed of aluminum oxide and/or its alloy components, and the film is decomposed and dispersed in the molten metal as it is to melt, and the treatment And transfer to the ladle or mold during the stirring.
In addition, there may be skin-derived particles on the solid metal charged into the furnace or furnace, or there may be refractory particles that have fallen off the furnace or the lining of the conveying tank. Although extra care must be taken during the sintering and degreasing of molten metal, some finely divided non-metallic solids are still left in the solidified metal. Although such non-metallic impurities are harmless in some castings, they are objectionable in other castings, especially if they interfere with obtaining a fine finish or act as a nucleus for forming air-filled voids.
Molten metal filtration has been proposed as a means of separating finely divided solid impurities suspended in the melt. For this purpose, it is recommended to use refractory material beds, compacted loose filter material blocks or screens. It has also been proposed that porous carbon bodies can be used as filter media because it provides very small tortuous channels that can trap and retain small suspended particles.
However, in practice, due to the relatively low flow rate obtained and the fast use of the porous carbon filter, the filter is clogged, and it is difficult to use the porous carbon filter especially when there is no external pressure. In fact, even applying pressure to the liquid cannot overcome the clogging problem.
AdTech provides an improved method of filtering molten aluminum through alumina ceramic foam filter that can increase the initial flow rate and minimize clogging without loss of filtration efficiency.