F - Mech Eng,Light,Heat,Weapons – 27 – D
Patent
F - Mech Eng,Light,Heat,Weapons
27
D
39/108, 53/357
F27D 27/00 (2010.01) B01F 5/10 (2006.01) B01F 11/00 (2006.01) C21C 7/00 (2006.01) C21C 7/10 (2006.01) C22B 9/00 (2006.01) C22B 9/02 (2006.01) C22B 21/00 (2006.01)
Patent
CA 1196196
Abstract of the Disclosure A method of stirring molten metal by repeatedly sucking and rapidly discharging part of the molten metal into and out of a refractory cylinder having a lower opening end immersed in the molten metal in a ladle, comprises operating the stirring under a condition that an inner diameter (d) of the refractory cylinder is less than 1,000 mm, a relation between the inner diameter (d, mm) of the refractory cylinder and weight (W, ton) of the molten metal in the ladle is d/W° ? 5 > 30, and an immersed depth of the refractory cylinder is within 200-700 mm. A pressurized gas for discharging the sucked molten metal out of the cylinder is introduced thereinto in an inclined direction relative to a vertical line against a point on an opposite inner wall of the cylinder at least 500 mm above the maximum suction level of the molten metal in the cylinder. A refractory cylinder operated in the above manner according to the invention comprises a flange connection between an uppermost and an intermediate cylinder parts of the cylinder at a location higher than the maximum suction height of the molten metal and a further flange connection between the intermediate cylinder part and a lowermost cylinder part. The refractory cylinder comprises at its immersed end a flow restricting opening to obtain more strong stirring the molten metal.
414943
Emi Toshihiko
Fujii Tetsuya
Fujimura Toshio
Oguchi Yukio
Sumida Norio
Kawasaki Steel Corporation
Smart & Biggar
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