Title:
METHOD FOR PROTECTING BOTTOM-BLOWN DOUBLE-TUBE TUYERE IN MOLTEN METAL REFINING FURNACE
Document Type and Number:
Japanese Patent JP3909589
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method for effectively preventing the wear of a tuyere caused by blowing-away of mushroom by suitably keeping the mushroom in a molten metal refining furnace having a double-tube tuyere at the furnace bottom.
SOLUTION: When the molten metal is refined by supplying refining gas from the inner tube of the tuyere and gas for cooling the tuyere from a gap between the inner tube and an outer tube, into the molten metal held in the molten metal refining furnace from the double tube type gas blowing tuyere arranged at the bottom of the molten metal refining furnace, a linear flowing velocity of the gas for cooling the tuyere in the gap between the inner tube and the outer tube of the tuyere, is made to be ≤ 220 Nm/sec.
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Inventors:
Shoichi Watanabe
Hiroyasu Morioka
Shigeyuki Nabeshima
Seiji Hosohara
Seiji Nabeshima
Hiroyasu Morioka
Shigeyuki Nabeshima
Seiji Hosohara
Seiji Nabeshima
Application Number:
JP2002333809A
Publication Date:
April 25, 2007
Filing Date:
November 18, 2002
Export Citation:
Assignee:
jfe Steel Corporation
International Classes:
C21C5/48; (IPC1-7): C21C5/48
Domestic Patent References:
| JP4268009A |
Attorney, Agent or Firm:
Eiichi Kobayashi
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