Title:
BLOWING LANCE FOR REFINING, BLOWING LANCE APPARATUS FOR REFINING, METHOD OF DESILICONIZING OF MOLTEN IRON, AND METHOD OF PRETREATMENT OF MOLTEN IRON
Document Type and Number:
WIPO Patent Application WO/2007/100113
Kind Code:
A1
Abstract:
A gas blowing lance (1) for blowing oxygen gas into a molten metal. It has a double-tube
structure comprising an inner tube (2) and an outer tube (3). Oxygen gas is blown
through the inner tube, and a hydrocarbon gas is blown through the space between
the inner tube and the outer tube. An Al2O3-MgO monolithic
refractory having an MgO content of 5-30 mass% is used as a refractory coating
layer for at least a blowing end part of the outer periphery of the outer tube. The
lance hence has high durability and can be used more times than conventional ones.
It contributes to a reduction in production cost. Also provided is a method of
the desiliconizing of molten iron which uses the blowing lance.
Inventors:
KIKUCHI NAOKI (JP)
HINO YUTA (JP)
NABESHIMA SEIJI (JP)
TAMIYA KENICHIRO (JP)
YAMAUCHI TAKASHI (JP)
OKADA KOJI (JP)
TANAKA YOSHIYUKI (JP)
SHIMIZU HIROSHI (JP)
HINO YUTA (JP)
NABESHIMA SEIJI (JP)
TAMIYA KENICHIRO (JP)
YAMAUCHI TAKASHI (JP)
OKADA KOJI (JP)
TANAKA YOSHIYUKI (JP)
SHIMIZU HIROSHI (JP)
Application Number:
PCT/JP2007/054109
Publication Date:
September 07, 2007
Filing Date:
February 26, 2007
Export Citation:
Assignee:
JFE STEEL CORP (JP)
KIKUCHI NAOKI (JP)
HINO YUTA (JP)
NABESHIMA SEIJI (JP)
TAMIYA KENICHIRO (JP)
YAMAUCHI TAKASHI (JP)
OKADA KOJI (JP)
TANAKA YOSHIYUKI (JP)
SHIMIZU HIROSHI (JP)
KIKUCHI NAOKI (JP)
HINO YUTA (JP)
NABESHIMA SEIJI (JP)
TAMIYA KENICHIRO (JP)
YAMAUCHI TAKASHI (JP)
OKADA KOJI (JP)
TANAKA YOSHIYUKI (JP)
SHIMIZU HIROSHI (JP)
International Classes:
C21C7/072; C04B35/66; C21C1/04
Foreign References:
JPH1112637A | 1999-01-19 | |||
JPH07242926A | 1995-09-19 | |||
JPH07223874A | 1995-08-22 | |||
JPH11171656A | 1999-06-29 | |||
JPH0499115A | 1992-03-31 | |||
JPH10140224A | 1998-05-26 | |||
JPH08209220A | 1996-08-13 |
Attorney, Agent or Firm:
OCHIAI, Kenichiro (JFE TECHNO-RESEARCH CORPORATION 7th Floor Yanagiya Building, 1-10, Nihonbashi 2-chom, Chuo-ku Tokyo 27, JP)
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