The quality of the aluminum melt is very important, 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 online purification of aluminium.
Reasons for Aluminum Pollution
There are many reasons for aluminum pollution. On the one hand, in the melting process, aluminum is exposed to the furnace atmosphere in a molten or semi-molten state. It is susceptible to oxidation, easy to react with water vapor to absorb hydrogen, and easy to form various forms of non-metallic slag ( lining fragments, chlorides, carbides in the flux) and coarse intermetallic particles.
On the other hand, some of the waste materials that make up the furnace charge introduce some non-aluminum impurities during circulation. Because the waste material comes from the process waste products, geometric waste materials and off-site waste materials of each process of the factory, the paths are different, the ingredients are complex, and the quality is also poor.
These impurities often cause bubbles and inclusions in the slab, which seriously affect the purity of the metal melt. Thereby, they further affecting the processing performance, mechanical properties, corrosion resistance and product appearance quality.
Nowadays, there are various methods to remove these harmful substances and purify the aluminum melt. According to different methods, these methods can be divided into two categories: in-furnace treatment and out-of-furnace continuous treatment (on-line treatment).
Online Purification of Aluminium
AdTech online degassing equipment is installed between the furnace and the casting machine. Its function is to remove hydrogen and other residues contained in the molten aluminum and its alloys. It has dual functions: processing and heating. Mainly used for melt purification in the production of high-precision aluminum products.
AdTech CFF filter box equipment is used for filtering and purifying aluminum and aluminum melt. It carries a filter plate, filters inclusions, and tiny particles in aluminum liquid, especially suitable for the production of high-purity high-precision aluminum and aluminum alloy. CFF Box has the advantages of high temperature resistance, oxidation resistance, corrosion resistance, long life.
Foam Ceramic Filter
The foam ceramic filter has a network pore structure, has a certain strength. It can withstand the pressure difference of the metal liquid level and the impact of the metal flow. But it is brittle and fragile. Due to the precise structure of this material, the quality is uniform and has a large surface area, so the filtration effect is excellent.
Foam filtration can effectively remove all kinds of inclusions in the aluminum melt, greatly improving the cleanliness of the metal. The foam ceramic filter plate has a great advantage in purifying the aluminum melt to reduce production costs and improve product quality. The foam ceramic filter plate has great benefits for strip foil and its products (such as can blanks, car decorative materials, PS printing plates, etc). Foam ceramic filter plates have a variety of pore sizes and are suitable for almost all aluminum processing industries.