公开(公告)号：US3925061A

公开(公告)日：1975-12-09

申请号：US33347673

申请日：1973-02-20

Applicant: ASEA AB

Inventor： CARLSSON LARS ERIK ,  GREVILLIUS NILS FREDRIK ,  HELLNER LARS IVAR

IPC: C21C7/00 ,  C21C7/06 ,  C21C7/064 ,  C21C7/10 ,  C21C7/02

CPC classification number: C21C7/06 ,  C21C7/0075 ,  C21C7/064 ,  C21C7/10

Abstract: A method for desulphurizing steel in heats over 1 metric ton in a container, such as a ladle furnace. The container is provided with a basic slag line and additionally with a lining which substantially prevents oxygen from leaking in through or from the lining. Basic slag-formers such as lime are added to the steel melt in the container in order to obtain highly basic slag and other desulphurizing agents such as misch metal may be added. The melt is well deoxidized by means of vacuum degassing or precipitation deoxidation, and subjected to vigorous stirring and heating during the process.