Title:
TOP-BLOWING LANCE FOR CONVERTER BLOWING AND MOLTEN IRON REFINING METHOD
Document Type and Number:
WIPO Patent Application WO/2019/039285
Kind Code:
A1
Abstract:
The present invention satisfies 0.19 ≤ L/L0 ≤ 0.82, where L0, given a cross section including the center axis of a lance and bisecting a boundary plane between a flow path of a lance inner tube and a nozzle hole, is the length of a line segment which passes through the most downstream point of the lance on the boundary plane and traverses the nozzle hole on a straight line perpendicular to the lance center axis, and L is the length of said traversing line segment when projected within the range of the flow path of the lance inner tube on a horizontal cross section taken perpendicular to the lance center axis.
Inventors:
TAMURA TEPPEI (JP)
ONO SHINPEI (JP)
ONO SHINPEI (JP)
Application Number:
PCT/JP2018/029747
Publication Date:
February 28, 2019
Filing Date:
August 08, 2018
Export Citation:
Assignee:
NIPPON STEEL & SUMITOMO METAL CORP (JP)
International Classes:
C21C5/46; C21C5/35
Domestic Patent References:
| WO2013094634A1 | 2013-06-27 |
Foreign References:
| JP2012117126A | 2012-06-21 | |||
| JP2001316714A | 2001-11-16 | |||
| JP2003328027A | 2003-11-19 | |||
| JP2017057468A | 2017-03-23 | |||
| JP2017057469A | 2017-03-23 |
Attorney, Agent or Firm:
KOKUBUN, Takayoshi (JP)
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