The quality of the alumina ceramic foam filter plate is very important in smelting aluminum melt, and it greatly affects the subsequent processing performance and the quality of the final product. Therefore, all countries in the world attach great importance to the purification of aluminum melt.
There are many reasons for aluminum pollution. On the one hand, during the smelting process, aluminum is exposed to the atmosphere in the furnace in a molten or semi-molten state, which is prone to oxidation, reacts with water vapor and absorbs hydrogen, and easily forms various forms of non-metallic slag (Such as furnace lining fragments, chlorides, carbides in flux, etc.) and coarse intermetallic particles, etc. On the other hand, part of the scraps that make up the charge brings some non-aluminum impurities during the circulation process. Because the waste comes from the process waste, waste, and off-site waste in each process of the factory, the pathways are different, the components are complex, and the quality is poor. The above-mentioned impurities often cause bubbles and inclusions in the casting slab, which seriously affect the purity of the molten metal, thereby further affecting the processing performance, mechanical properties, corrosion resistance and appearance quality of the product.
The alumina ceramic foam filter plate can effectively remove various inclusions in the aluminum water with a fineness of micrometers, so that the aluminum water becomes a smooth laminar flow, which is beneficial to filling. It has a unique mullite-corundum structure, good mechanical strength and chemical stability, and excellent aluminum water erosion resistance. Strictly controlled hole size and through-hole rate can obtain a stable filtering effect. The ceramic foam filter plate is surrounded by a sealing ceramic fiber liner, which helps to seal the filter plate in the filter box and ensures that there is no side flow of molten metal. The product is mainly used in the purification process of aluminum and aluminum alloy production, and also used as various gas-solid, liquid-solid separation media, catalyst carriers, burners, sound-absorbing and environmental protection fields.