METHOD OF REFINEMENT OF THE ALUMINUM ALLOYS Russian patent published in 2008 - IPC C22B9/10 C22C1/06 C22B21/06 

FIELD: nonferrous metallurgy industry; other industries; ecological protection; methods of refinement of aluminum alloys.

SUBSTANCE: the invention is pertaining to the method of refinement of aluminum alloys. The method includes treatment of the molten bath with the flux containing chlorides, fluorides and the refractory filling agents in the form of the dispersion particles of the refractory aluminum and silicon oxides. At that the flux is admixed in the alloy, which is in the solid-liquid state, and then it is heated up to the temperature of 720-730°С. In the capacity of the basic refinement reactant in the flux is used silicon dioxide SiO₂ or the metakaolinite Al₂О₃·2SiO₂ at the following components ratio(in mass %): KCl - 1.9-9.4, NaCl - 1.2-6.0, Na₃AlF₆ - 0.9-4.6, SiO₂ or - Al₂O₃·2SiO₂ - the rest. The invention ensures the ecological protection, the heightened refinement capability, the low net cost.

EFFECT: the invention ensures the ecological protection, the heightened refinement capability, the low net cost.

2 cl, 1 tbl, 5 ex