Patent ID: 8167970

Claim:
A method for purifying Al(aluminum)—Ti(titanium)—B(boron) alloy melt comprising: a. putting an industrial aluminum ingot in an electromagnetic induction smelting furnace and melting the ingot, the melt of Al being covered by a high-temperature covering agent, and its temperature up to about 670˜900° C.; b. adding material of K 2 TiF 6 and KBF 4 into the smelting furnace and then stirring the material and the melt of Al to react in accordance with reaction formula of to form a mixture including an alloy of Al(TiB 2 +TiAl 3 ); wherein in the alloy of Al (TiB 2 +TiAl 3 ), a proportion of Ti is about 1˜10%, a proportion of B is about 0.001˜5%, and the rest is Al; and c. adding compound comprising Mg(magnesium), Li(lithium), Na(sodium) and F(fluorine) to the mixture, the compound having an amount about 0.01%˜1% of a sum weight of total K 2 TiF 6 and KBF 4 , and uniformly stirring for about 15˜60 minutes under a reaction temperature being constantly at about 670˜900° C., removing dregs from the alloy, and casting molding the Al alloy.