Metal Metallurgy Casting Foundry refining flux
Metallurgy is to remove impurities (non-intentional elements) in the metal solution by melting (heating above the melting point) for slag formation and slag removal, while certain chemical components are relatively pure by slag removal, decarburization, deoxidation, etc. The process of alloy composition. The finer refining process is generally a metal foundry.
refining flux has always been the subject of research on aluminum alloy casting and rolling, and the purity of the nitrogen used for refining in the purification device is a key factor that directly affects the purification effect.
refining flux is the purpose of spraying Nitrogen into molten aluminum to remove hydrogen.
In addition, degassing is also considered to be a very effective way to float impurities.
Two main theoretical modes have been proposed to explain the principle of degassing. The macro mode considers that the removal of each impurity is similar in nature. The microscopic mode, that is, according to this theory, due to the higher vapor pressure of hydrogen, the dissolved hydrogen diffuses into the gas in the injected aluminum liquid.
Theoretically, an inclusion having a diameter of 10 microns contacts a bubble and is adsorbed on the bubble and floats up to the surface of the liquid.
refining flux breaks up the Nitrogen large bubble into a very fine small bubble by rotating the Nitrogen rotor at a high speed and uniformly disperses it in the molten metal.
By reducing the diameter of the bubbles, the total surface area of ??these bubbles increases sharply, which causes more Nitrogen bubble surfaces to come into contact with hydrogen and impurities in the molten metal to bring these harmful substances to the surface of the liquid.