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1. (WO2018021248) AUXILIARY BURNER FOR ELECTRIC FURNACE

Pub. No.:    WO/2018/021248    International Application No.:    PCT/JP2017/026715
Publication Date: Fri Feb 02 00:59:59 CET 2018 International Filing Date: Tue Jul 25 01:59:59 CEST 2017
IPC: F23D 14/24
F23C 1/12
F23D 17/00
F27B 3/08
F27D 3/16
F27D 7/02
Applicants: JFE STEEL CORPORATION
JFEスチール株式会社
CHUGAI RO CO., LTD.
中外炉工業株式会社
Inventors: TSUTSUMI Koichi
堤 康一
MIWA Yoshihiro
三輪 善広
OZAWA Sumito
小澤 純仁
SUMI Ikuhiro
鷲見 郁宏
TOMOZAWA Kenichi
友澤 健一
ITO Takayuki
伊藤 貴之
Title: AUXILIARY BURNER FOR ELECTRIC FURNACE
Abstract:
Provided is an auxiliary burner for an electric furnace, the burner being capable of increasing and homogenizing the heating effect of iron scrap by suitably and efficiently burning solid fuel along with gas fuel. This auxiliary burner 100 for an electric furnace comprises, in the stated order from the center side, a solid fuel injection tube 1, a gas fuel injection tube 2, and a combustion-supporting gas injection tube 3, all arranged coaxially, and is characterized in that: a flow path 30 of the combustion-supporting gas injection tube 3 is provided with a plurality of turning blades 4 for turning the combustion-supporting gas, and a flow path 20 of the gas fuel injection tube 2 is provided with a plurality of turning blades 5 for turning the gas fuel; and the angle θ1 of the turning blades 4 and the angle θ2 of the turning blades 5 satisfy the relationship θ1<θ2.