Modelling Research of Hydrogen Desorption from Liquid Aluminium and Its Alloys

Barbotage is one of the most universal methods used for refining process of aluminium and its alloys. In this process tiny gas bubbles are generated and during their rising up to the surface the hydrogen is removed. In the same time some inclusions such as sodium, calcium and non-metallic particles, like oxides or borides can be also eliminated from the liquid metal due to flotation 1 . There are several technological solutions of the barbotage process. The method of gas introduction to the metal such as lance, ceramic porous plugs, nozzles or rotary impellers plays an important role in these solutions. Nowadays many batch reactors are replaced by continuous reactors and the continuous refining process becomes more and more popular 2 .