CONTINUOUS CASTING METHOD OF THIN METALLIC PLATE

摘要

PURPOSE:To use a nozzle of a conventional size and to cast a thin-walled steel plate continuously and stably in the stage of producing the thin-walled steel plate by continuous casting by utilizing molten slag in a casting mold of a specific shape and drawing the steel plate from the casting mold. CONSTITUTION:Molten steel 2 in a tundish 1 is charged into a water-cooled casting mold 10 for continuous casting with a nozzle 3 of an oridinary size in the stage of casting a thin-walled steel plate continuously. The upper part of the mold 10 in this case is formed of a broad part 10a lined with a refractory material 11 and a narrow mold part 10b of the same thickness as the thickness of the thin steel plate. Molten slag 12 is put into the mold and plural nonconsumable electrodes 7 are inserted into the slag 12. Electric conduction is performed between the electrodes 7 and the continuous casting ingot 5 drawn from the mold 10 to heat the slag 12 with Joule heat and to maintain the slag always in the molten state of a specified temp. The molten steel charged through the nozzle 3 immersed in the slag 12 is cleaned while the same passes through the slag 2, and is insulated in terms of heat, whereby the molten steel is drawn stably and continuously as a thin-walled steel ingot 5 without sticking on the inside wall of the mold 10.