Title:
LANCE NOZZLE
Document Type and Number:
WIPO Patent Application WO/2020/209173
Kind Code:
A1
Abstract:
Provided is a top-blown lance nozzle whereby the correct-expansion condition is arbitrarily switched and an oxygen feed rate and jetting velocity are controlled independently, without the need for a plurality of lance nozzles or a mechanical movable part. The present invention provides a lance nozzle 1 for blowing gas from a top-blown lance onto molten iron charged into a reaction container and blowing refining oxygen onto the molten iron, wherein one or more air blowing holes 4 for blowing a working gas are provided in the inner-wall-side surface of the lance nozzle, in or near the region in the axial direction of the nozzle having the smallest transverse cross-sectional area.
Inventors:
MURAKAMI YUMI (JP)
ODA NOBUHIKO (JP)
FUJII YUSUKE (JP)
OKUYAMA GORO (JP)
AMANO SHOTA (JP)
KOSEKI SHINJI (JP)
SATO SHINGO (JP)
TAKAHASHI YUKIO (JP)
KAWABATA RYO (JP)
KIKUCHI NAOKI (JP)
YUASA ATSUO (JP)
ODA NOBUHIKO (JP)
FUJII YUSUKE (JP)
OKUYAMA GORO (JP)
AMANO SHOTA (JP)
KOSEKI SHINJI (JP)
SATO SHINGO (JP)
TAKAHASHI YUKIO (JP)
KAWABATA RYO (JP)
KIKUCHI NAOKI (JP)
YUASA ATSUO (JP)
Application Number:
PCT/JP2020/015189
Publication Date:
October 15, 2020
Filing Date:
April 02, 2020
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
C21C5/46; C21C7/072
Foreign References:
| JP2004156083A | 2004-06-03 | |||
| JP2000234116A | 2000-08-29 | |||
| JP2019077934A | 2019-05-23 | |||
| JPH1030110A | 1998-02-03 | |||
| JP2000234115A | 2000-08-29 |
Other References:
See also references of EP 3954789A4
Attorney, Agent or Firm:
GINZA MARONIE P.C. (JP)
Download PDF:
Previous Patent: WORK MACHINE AND CONTROL METHOD
Next Patent: STEAM PROCESSING METHOD FOR STEEL-MAKING SLAG
Next Patent: STEAM PROCESSING METHOD FOR STEEL-MAKING SLAG