Title:
溶鋼の昇温方法
Document Type and Number:
Japanese Patent JP6766673
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method for heating molten steel that can control the local flow of molten steel in a vacuum tank and can easily and stably suppress the formation of a lower oxide at the time of oxygen blowing.SOLUTION: There is provided a method for heating molten steel in which oxygen is blown onto the surface of the molten steel from the top-blown lance set inside a vacuum chamber so as to react with Al in the molten steel in an RH vacuum degassing system. By controlling the relationship between the surface flow velocity of the molten steel in the vacuum chamber, the top-blown oxygen flow rate and the Al concentration in the molten steel after the oxygen blowing to predetermined conditions, local flow of the molten steel in the vacuum chamber is controlled.SELECTED DRAWING: Figure 1
Inventors:
Kushimoto Atsushi
Shuhei Kasahara
Shuhei Kasahara
Application Number:
JP2017022029A
Publication Date:
October 14, 2020
Filing Date:
February 09, 2017
Export Citation:
Assignee:
Nippon Steel Corporation
International Classes:
C21C7/10
Domestic Patent References:
| JP9235612A | ||||
| JP10168511A | ||||
| JP2008255421A | ||||
| JP2016037615A |
Attorney, Agent or Firm:
Takayoshi Kokubun