Molten steel denitrification method and steel production method
Number of patents in Portfolio can not be more than 2000
United States of America
Stats
-
Mar 18, 2025
Grant Date -
Jul 25, 2024
app pub date -
May 12, 2022
filing date -
May 12, 2022
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A molten steel denitrification method, wherein an extremely low nitrogen concentration range is stably reached in a short time without use of a top-blown gas, is a denitrification process wherein CaO—and—Al2O3-containing slag formed by a combination of an Al addition step of adding a metal—Al-containing substance to molten steel to deoxidize and turn the molten steel into Al-containing molten steel and a CaO addition step of adding a CaO-containing substance to the molten steel is brought into contact with the Al-containing molten steel to remove nitrogen in the molten steel, in which the molten steel is stirred at a stirring power density ε of 60 W/t or higher. In the denitrification process, a surface of the molten steel or the slag is subjected to an atmosphere of 1.0×105 Pa or lower. In a steel production method, the obtained molten steel is cast after the components are adjusted.
First Claim
Family
International Classification(s)
- [Classification Symbol]
- [Patents Count]
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully