The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 05, 2022
Filed:
Sep. 27, 2017
Jfe Steel Corporation, Tokyo, JP;
Yoshihiro Miwa, Tokyo, JP;
Koichi Tsutsumi, Tokyo, JP;
Sumito Ozawa, Tokyo, JP;
Ikuhiro Sumi, Tokyo, JP;
JFE STEEL CORPORATION, Tokyo, JP;
Abstract
Provided is an auxiliary burner for an electric furnace that has high iron scrap heating effect by appropriately and efficiently burning a solid fuel such as coal together with a gas fuel. An auxiliary burner for an electric furnacehas a structure in which a solid fuel injection tube, a gas fuel injection tube, and a combustion-supporting gas injection tubeare coaxially arranged in order from the center. The front end of the solid fuel injection tubeis located inside the gas fuel injection tubeto form, between the front end of the solid fuel injection tubeand the front end of the gas fuel injection tube, a first spacefor solid fuel and gas fuel premixing surrounded by the front end portion of the gas fuel injection tube