Title:
溶鋼の昇温方法
Document Type and Number:
Japanese Patent JP6953714
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method for increasing temperature of molten iron for largely reducing inclusion amount in the molten iron and FeO concentration in a slag in a temperature increasing treatment of the molten iron for spraying oxidizable gas such as oxygen gas to a molten iron surface in a vacuum tank containing Al with a vacuum degassing device.SOLUTION: In a temperature increasing treatment for praying oxidizable gas such as oxygen gas to a molten iron surface in a vacuum tank containing Al by using a vacuum degassing device, spraying or blowing of CaO-based flux to the molten iron is initiated before completion of oxidizable gas spraying, and spraying or blowing of the flux is stopped after completion of oxidizable gas spraying.SELECTED DRAWING: Figure 3
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Inventors:
Mitsuhiro Numata
Application Number:
JP2016255807A
Publication Date:
October 27, 2021
Filing Date:
December 28, 2016
Export Citation:
Assignee:
Nippon Steel Corporation
International Classes:
C21C7/10
Domestic Patent References:
| JP10168511A | ||||
| JP9053109A | ||||
| JP2002030330A |
Attorney, Agent or Firm:
Intellectual Property Office