METHOD FOR DESULFURIZING MOLTEN STEEL

Japanese Patent JP3404760

B2

PURPOSE: To provide a method, in which high efficient desulfurization can be obtd. even if flux powder quantity injected on molten steel surface is little in a vacuum vessel of an RH vacuum degassing device.
CONSTITUTION: At the time of executing the desulfurization of the molten steel by blowing the flux powder together with carrier gas against the circulated molten steel surface from a ladle in a vacuum vessel of the RH vacuum degassing device, the total concn. of FeO and MnO in the slag on the molten steel in the ladle is made to be ≤5wt.% and Al concn. in the molten steel in the ladle is adjusted to ≥0.02wt.%.

WO/2018/201552	METHOD AND APPARATUS FOR HIGH-EFFICIENCY DEPHOSPHORIZATION BY MASS-ENERGY CONVERSION CYCLING AND MULTI-COMPONENT BLOWING FOR DEPHOSPHORIZATION CONVERTER GAS
WO/2003/085141	METHOD AND DEVICE FOR PRODUCING CARBON STEELS OR STAINLESS STEELS BY BLOWING HIGH-PHOSPHORUS PIG IRON IN AN ELECTRIC ARC FURNACE OR IN A CONVERTER VESSEL

Tetsuya Fujii
Yoshihide Kato
Osamu Kirihara
Shigeru Ohmiya
Masato Suito

JP1906592A

May 12, 2003

February 04, 1992

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Kawasaki Steel Co., Ltd.

C21C7/064; C21C7/072; C21C7/076; (IPC1-7): C21C7/064; C21C7/072; C21C7/076

Junzo Ogawa (1 person outside)

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