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:
Nov. 18, 2025
Filed:
Feb. 16, 2021
Jfe Steel Corporation, Tokyo, JP;
Jfe Mineral & Alloy Company, Ltd., Tokyo, JP;
Nobuhiko Oda, Tokyo, JP;
Yusuke Fujii, Tokyo, JP;
Shingo Sato, Tokyo, JP;
Ryo Kawabata, Tokyo, JP;
Naoki Kikuchi, Tokyo, JP;
Toshio Shiota, Tokyo, JP;
Ippei Higuchi, Tokyo, JP;
JFE STEEL CORPORATION, Tokyo, JP;
JFE MINERAL & ALLOY COMPANY, LTD., Tokyo, JP;
Abstract
A method for producing low-carbon ferromanganese capable of achieving a high Mn yield. In producing low-carbon ferromanganese by blowing an oxidizing gas from a top-blowing lance onto a bath face of high-carbon ferromanganese molten metal accommodated in a reaction vessel provided with a top-blowing lance and bottom-blowing tuyere to perform decarburization, the slag composition during the blowing is adjusted so that a value of (CaO+MgO)/(AlO+SiO) on a mass basis in the slag composition is not less than 0.4 but not more than 5.0. Also, agitation is performed under a condition that an agitation power density ε of an agitation gas blown through the bottom-blowing tuyere is not less than 500 W/t.