| 摘要 |
PURPOSE:To improve strength and quality of a strip by arranging cooling device at outside of stirring device and also rotary stirring rod and temp. detector for molten metal in the inner part of the stirring device and controlling coolings of the cooling device and the stirring rod based on the molten metal temp. CONSTITUTION:Two stirring chambers 12, 13 are formed in a casting 14 of the stirring device 10 and also the cooling device 21 providing cooling pipes at outside of the stirring device 10 is arranged. The non-contacting type detector is arranged at downstream side of the stirring chambers 12, 13 and the stirring rods 15, 16 cooled in inner part thereof are rotatably arranged in the stirring chamber. After exhausting air for vacuum in a vacuum chamber 11, the molten metal 4 is supplied in a tundish 9 and casting is executed into endless mold of rolls 1, 2, etc. Then, based on the detected temp. of the temp. detector 18, the coolings of the cooling device 21 and the stirring rods 15, 16 are controlled and the crystal grain 59 in semi-solidified slurry 60 is made to fine. By this method, the strength and quality of the strip are improved. |
