METHOD FOR COOLING IMMERSION TUBE

Japanese Patent JP3256275

B2

PURPOSE: To safely and effectively cool an immersion tube and to extend the service life of the immersion tube by arranging a passage around a core metal in the immersion tube for treating molten steel and flowing gas mixing fine water drips.
CONSTITUTION: The immersion tube 1 for circulating the molten steel into a ladle and a treating vessel in order to execute degassing refining, component adjustment, etc., to the molten steel is constituted by arranging a refractory 3 around the core metal 2. In order to prevent the erosion of the core metal 2 caused by heating with the high temp. molten steel, the development of longitudinal crack to the refractory 3 caused by heat expansion of the core metal 2 and the breakage of the immersion tube 1 caused by contacting with the molten steel, a cooling furnace 4 composed of a half-cutting pipe is formed around the core metal 2, and by introducing cooling medium 5 from an inlet 4a and discharging from an outlet 4b, the immersion tube 1 is cooled. As the cooling medium 5, the gas 10 such as air, etc., and the clean water 9 are supplied into the water drip classifier 7 and the clean water is supplied as the fine water drips having ≤30μm together with the air 10 into the cooling passage 4 from a fog generating nozzle 8 through a carrying pipe 6. Apparent sp. heat of the colling medium 5 is increased by mixing the water drips and also, the immersion pipe 1 is effectively cooled with large vaporizing latent heat of the water drips.

Kanji Aizawa
Kiyoshi Takahashi
Nobumoto Takashiba
Michihiro Kuwayama
Masato Suito

JP13825992A

February 12, 2002

May 29, 1992

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Kawasaki Steel Co., Ltd.

C21C7/10; F27D9/00; (IPC1-7): C21C7/10; F27D9/00

JP5896813A

Akihide Sugimura (5 outside)

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