19 7月 Aluminium Foundry Purify
Aluminium Foundry Purify mainly removes lining fragments, various forms of non-metallic slag inclusions such as chlorides and carbides in the flux, and coarse intermetallic particles.
The quality of the aluminum melt is very important, it affects the subsequent processing performance and the quality of the final product to a large extent. Therefore, countries all over the world wish very much for the purification of aluminum melt.
The aluminum alloy ceramic foam filter has great benefits to the strip foil and its products (such as can blanks, car finishing materials, PS printing plates, etc.) after purifying the aluminum liquid.
The application of ceramic foam filter plates in China’s aluminum processing industry has become popular. Aluminium Foundry Purify mainly has 2 modes
In the aluminum alloy semi-continuous casting line, the melt is refined with the flux spray in the furnace, and the foam ceramic plate is used outside the furnace to filter. The aluminum alloy ceramic filter plate is replaced every time the casting, and there are also aluminum processing plants today. Add a trough-type online deaerator before filtering to improve the purification effect
The first one is to determine the replacement cycle based on the pressure difference between the front and rear of the aluminum alloy filter plate in the continuous casting and rolling line. As for the size of the aluminum alloy filter plate to be selected, it is determined according to the unit time flow of the aluminum liquid and the total amount of the aluminum liquid.
The choice of aluminum alloy foam ceramic filter plate with a large number of meshes and pores is determined according to the cleanliness requirements of the final molten aluminum. The higher the cleanliness requirements of the molten aluminum, the smaller the pore size selected.
Foam ceramic filtration purification is the last process of aluminum liquid purification. Before this process, flux spraying refining or on-line rotary degassing treatment has been used, so the impurity phase hydrogen particles in the aluminum liquid that have not been removed are more fine and dispersed.
During the transportation and use of the aluminum alloy filter plate, the aluminum alloy filter plate has to withstand the impact of a certain external pressure, so we have also introduced the index of compressive strength as a measure of the aluminum alloy filter plate during the development of the standard. One of the basis for good or bad quality. The higher the compressive strength, the more the product is used, the better the quality, and vice versa.
When the flow is released for casting, the high-temperature aluminum liquid suddenly comes into contact with the surface of the aluminum alloy filter plate, and the filter plate is heated in a few tenths of a second. The heat of the aluminum liquid makes the aluminum alloy filter plate quickly rise to close to the metal temperature, and the aluminum alloy filter plate is Instantaneous thermal expansion, which requires that the aluminum alloy filter plate should have a small thermal expansion coefficient and will not crack after being heated; and because the aluminum alloy filter plate soaked in the aluminum liquid will last for a certain period of time, it is not allowed to be washed out and softened during work. Deformed.