Title:
LADLE FOR MOLTEN METAL AND METHOD FOR REFINING MOLTEN METAL
Document Type and Number:
Japanese Patent JP3589075
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain a ladle which can execute mechanical stirring of molten metal by forming the horizontal cross section at least near the statical bath surface height of stored molten metal to non-circular shape.
SOLUTION: Relating to the ladle, preferably the non-circular shape is made to an elliptic shape having 0.75-0.95 in the range of the ratio of minor axis/major axis and the vicinity of the statical bath surface height is at least 200 mm in the vertical range of the statical bath surface, and the mechanical stirring means is provided in the inner part where the molten metal is contained. When the molten iron 5 is stirred with an impeller, the vertical stream (a) is generated and the larger the number of the rotation is, the stronger the stream (a) is, and the bath surface 10 is raised near the recessed side wall at the center part and becomes the max. near the side wall on the minor axis. However, since the space, in which the stream is run away by the difference between the minor axis side at the wall side on the major axis exists, the stream (a) is separated and the stream (b) is generated and the raising of the bath surface is lost in the stream (b) direction and reduced. In this way, the over-flow of molten metal from the ladle during refining is eliminated and the refining can stably and smoothly be executed to improve the refining effect.
Inventors:
Nozomi Tamura
Tomoaki Tadama
Shigeru Ogura
Tomoaki Tadama
Shigeru Ogura
Application Number:
JP5989699A
Publication Date:
November 17, 2004
Filing Date:
March 08, 1999
Export Citation:
Assignee:
jfe Steel Corporation
International Classes:
B22D11/10; B22D1/00; B22D41/00; C21C7/00; C21C7/04; C22B9/00; (IPC1-7): C21C7/00; B22D1/00; B22D11/10; B22D41/00; C21C7/04; C22B9/00
Domestic Patent References:
| JP51112416A | ||||
| JP46008084B1 |
Attorney, Agent or Firm:
Yoshio Kosugi
Masaki Yamada
Masaki Yamada