| 摘要 |
PURPOSE:To reduce the length of a shrinkpipe in the terminal part of a continuous casting ingot and to improve the yield of the continuous casting ingot by covering the surface of the molten metal in a casting mold for continuous casting with a specific refractory heat insulating material. CONSTITUTION:Upon ending of charging of molten metal 2 from an immersion nozzle 4 of a tundish into a casting mold 1 for continuous casting, powder of refractories such as lime, alumina, dolomite or the like and an oil 7 are packed on the surface of said molten metal so as to provide a lubricant in the stage of taking off a cast ingot 2' from the mold 1. A refractory heat insulating material 8 consisting of a thermit heating material as refractories such as line, silica, alumina, dolomite or the like, or a mixture of powder of metallic aluminum and metallic oxides is covered thereon. Since the final end part of the ingot 2 is heated or insulated with the above-described material 8, the length of a pipe 3 is made shorter, and the yield of the continuous casting ingot is improved. |
