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Patent Searching and Data


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 (6-1 Marunouchi 2-chome, Chiyoda-k, Tokyo 71, 〒1008071, JP)
ONO, Shinpei (6-1 Marunouchi 2-chome, Chiyoda-k, Tokyo 71, 〒1008071, JP)
Application Number:
JP2018/029747
Publication Date:
February 28, 2019
Filing Date:
August 08, 2018
Export Citation:
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Assignee:
NIPPON STEEL & SUMITOMO METAL CORPORATION (6-1 Marunouchi 2-chome, Chiyoda-ku Tokyo, 71, 〒1008071, JP)
International Classes:
C21C5/46; C21C5/35
Domestic Patent References:
WO2013094634A12013-06-27
Foreign References:
JP2012117126A2012-06-21
JP2001316714A2001-11-16
JP2003328027A2003-11-19
JP2017057468A2017-03-23
JP2017057469A2017-03-23
Attorney, Agent or Firm:
KOKUBUN, Takayoshi (5th Floor, NBF Ikebukuro City Building 17-8, Higashi-Ikebukuro 1-chome, Toshima-k, Tokyo 13, 〒1700013, JP)
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