Title:
転炉の精錬方法
Document Type and Number:
Japanese Patent JP5686091
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a converter refining method capable of speeding up a decarburization treatment of the converter in steel making while reducing the generation of spitting and slopping.SOLUTION: The converter refining method includes: a step S1 for calculating an in-furnace residual oxygen concentration per 1 ton of slag from operational actual results in a prior converter decarburization treatment; a step S2 for comparing the concentration with an actual value after the treatment to obtain the correction factor of an exhaust gas flow rate from the difference; a step S3 for sequentially calculating the in-furnace residual oxygen concentration from the amount of oxygen supply in the current converter decarburization treatment, the exhaust gas flow rate corrected by using the obtained exhaust gas correction factor, an exhaust gas composition, a molten iron component, and an auxiliary material consumption to understand the absolute value of slag properties; and an adjustment step S4 for adjusting at least one of the amount of oxygen supply, a lance height, and a bottom-blowing gas flow corresponding to the value of the in-furnace residual oxygen concentration.
Inventors:
佐藤 晶
岩村 健
古庄 隆浩
佐藤 良雄
岩村 健
古庄 隆浩
佐藤 良雄
Application Number:
JP2011256135A
Publication Date:
March 18, 2015
Filing Date:
November 24, 2011
Export Citation:
Assignee:
新日鐵住金株式会社
International Classes:
C21C5/30; C21C5/35; C21C5/46
Attorney, Agent or Firm:
Yamamoto 典輝
Akihiko Yamashita
Kishimoto Expert
Akihiko Yamashita
Kishimoto Expert