The behaviors of inclusions and hydrogen in molten aluminium were analysed

and the mechanism between inclusions and hydrogen in molten aluminium which had been testified by means of the study on the purification of aluminium scraps was advanced.The authors held that hydrogen parasitized on inclusions and inclusions absorbed hydrogen

removing inclusions form molten aluminium is the fundamental step of eliminating hydrogen.The effect of the technique of the purifiction of flux filtration is remarkable

so we should attach great importance to the techmque.