Title:
METHOD FOR EXTREMELY REDUCING PHOSPHORUS IN LOW SILICON MOLTEN IRON
Document Type and Number:
Japanese Patent JPS5913008
Kind Code:
A
Abstract:
PURPOSE: To reduce effectively the concn. of P in low Si molten iron to a very low level with a small amount of a refining agent by dephosphorizing the molten iron twice.
CONSTITUTION: When molten iron kept at 1,200W1,450°C is dephosphorized with a CaO-base refining agent, the molten iron is adjusted to ≤0.2% concn. of Si and roughly dephosphorized in the 1st stage. The roughly dephosphorized molten iron is subjected to finish dephosphorization with said refining agent in the 2nd stage. Thus, the concn. of P in the molten iron can be effectively reduced to ≤50ppm.
Inventors:
HARASHIMA KAZUMI
MUKAI TATSUO
GOTOU HIRONORI
FUKUDA YOSHIMORI
SUMITA MORIHIRO
MUKAI TATSUO
GOTOU HIRONORI
FUKUDA YOSHIMORI
SUMITA MORIHIRO
Application Number:
JP12055482A
Publication Date:
January 23, 1984
Filing Date:
July 13, 1982
Export Citation:
Assignee:
NIPPON STEEL CORP
International Classes:
C21C1/04; C21C1/00; (IPC1-7): C21C1/02
Attorney, Agent or Firm:
Kazuo Ozeki