PREVENTION METHOD OF CLOGGING OF MOLTEN METAL CHARGING NOZZLE IN CONTINUOUS CASTING

摘要

PURPOSE:To prevent surely clogging of a charging nozzle owing to solidification of a molten metal by impressing a voltage between the molten metal in a tundish and the molten metal in a casting mold and heating the molten metal in the charging nozzle. CONSTITUTION:The molten metal 2 in a tundish 1 is charged via a charging nozzle 4 into a casting mold 5, by which a billet is cast. An electrode 7 is immersed into the metal 6 in the mold 5 to provide a cathode, and an electrode 3 is immersed in the metal 2 in the tundish 1 to provide an anode. Electricity is conducted to said electrodes to pass the current from the electrode 3 through the nozzle 4 and the molten metal 8 in the charging nozzle to the electrode 7. The max. calorific value is thus obtd. in the nozzle 4 part to heat the nozzle 4 and the metal 8 by which the formation of the solidified metal and the clogging of the nozzle 4 are prevented.