粒鉄製造装置および粒鉄製造方法

Japanese Patent JP7444147

B2

To manufacture granular irons with proper grain diameter stably and continuously over a long term.SOLUTION: The present invention relates to: a granular iron manufacturing apparatus comprising a tundish 1 including a nozzle 2 for molten iron discharge, a molten iron receiver 3 which causes molten iron, which is discharged from the nozzle 2 and flows down, to collide with a liquid column of the molten iron, and a cooling water tank 4 which drops droplets of the molten iron, which have collided with the molten iron receiver 3 and dispersed around the same, in cooling water to cool the same; and a grain iron manufacturing method with use of this apparatus. A nozzle diameter d0 of the nozzle 2, a discharge speed v0 of the molten iron from the nozzle 2, and a vertical distance hd from a tip of the nozzle 2 to a top face of the molten iron receiver 3 are configured so that a collision Reynolds number I satisfies 3000≤I≤7500, and are set in the discharge speed v0 and the nozzle vertical distance hd so that the collision Reynolds number I satisfies 3000≤I≤7500 when the nozzle diameter is so made as to be a nozzle diameter at a use limit time of the nozzle 2 (herein, a nozzle when the nozzle 2 becomes use limit due to expansion of the nozzle diameter caused by nozzle wear).SELECTED DRAWING: Figure 4

Shunsuke Mori
Hiroomi Miyata
Takehiro Tsuchida
Yuta Hoku
Satoshi Kawabata

JP2021137994A

March 06, 2024

August 26, 2021

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JFE Steel Corporation

B22D23/00; B22D5/00; B22F9/08

JP2018512499A
JP52020948B1
JP2022181262A
JP2022159667A
JP2022149432A
JP2021127510A
JP2021161465A
JP2009221550A

Masatoshi Tomabechi

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