METHOD FOR CONTROLLING SLIDING NOZZLE DEVICE, AND METHOD FOR MANUFACTURING SLAB

WIPO Patent Application WO/2020/158465

A1

Provided are a method for controlling a sliding nozzle device and a method for manufacturing a slab, with which it is possible to suppress the occurrence of a non-opening hole when molten steel in a ladle is to be re-poured. The method includes a gas blowing step in which, in a state in which molten steel (4) is accommodated in a ladle (1), a sliding plate (32) is set to an open position, and a portion of the molten steel (4) is poured out from the ladle (1) through a first nozzle hole (311) and a second nozzle hole (321), after which the sliding plate (32) is moved to a closed position and an inert gas is blown from a gas blowing hole (322) into the molten steel (4) in the ladle (1) through the first nozzle hole (311), and, after the gas blowing step, a re-pouring step in which the sliding plate (32) is set to the open position, and molten steel (4) is poured out from the ladle (1) through the first nozzle hole (311) and the second nozzle hole (321), wherein the amount of inert gas blown in in the gas blowing step is at least equal to 3.9 Nm3/(min∙m2) and at most equal to 26.0 Nm3/(min∙m2).

MIHARA RYOSUKE (JP)
KUMAGAI ATSUSHI (JP)
HASEGAWA TAKASHI (JP)
WATANABE YUSUKE (JP)
YAMAUCHI TAKASHI (JP)
UEHARA HIROHIDE (JP)

PCT/JP2020/001590

August 06, 2020

January 17, 2020

Click for automatic bibliography generation  

JFE STEEL CORP (JP)

B22D11/10; B22D11/18; B22D41/42

JP2017177109A	2017-10-05
JP2013107100A	2013-06-06
JP2000202599A	2000-07-25
JPH0947862A	1997-02-18
JP2012161830A	2012-08-30
JPH06218530A	1994-08-09

TANAKA Hidetetsu et al. (JP)

View/Download PDF      PDF Help

Previous Patent: LASER ANNEALING METHOD AND LASER ANNEALING APPARATUS

Next Patent: SUPPORT DEVICE, SUPPORT METHOD AND SUPPORT PROGRAM