FIELD: nonferrous metallurgy; ferrous metallurgy; methods of aluminum purification from the impurity metals oxides.
SUBSTANCE: the invention is pertaining to metallurgy industry and man be used for purification of the various aluminum wastes from the impurity metals oxides with production the aluminum used for the anticorrosion coating of the steel strips, for the steel deoxidation in the open-hearth furnaces, manufacture of the various products from aluminum, production of the various alloys on the basis of the aluminum. The method provides for the loading of the aluminum in the stand into the melt of the mixture of the salts of the sodium chloride, sodium fluoride, potassium chloride containing 5-7 mass % of borax, at the temperature of 750-850°С. The melt of the admixture of the salts has the following composition (in mass %): NaCl - 63, NaF - 25, KCl - 12. The method may be exercised in the continuous mode. The technical result of the invention is the increased productivity of the furnace, the contents of aluminum in the purified aluminum is not less than 99.35 mass %, elimination of the incrustation on the walls of the crucible of the furnace and reduction of the power inputs.
EFFECT: the invention ensures the increased productivity of the furnace, the contents of the aluminum in the purified aluminum is close to one hundred mass percent, elimination of the incrustation on the walls of the crucible of the furnace, reduction of the power inputs.
2 cl, 1 dwg, 1 tbl
