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.

Date of Patent:
Dec. 16, 2025

Filed:

Mar. 07, 2023
Applicants:

Midrex Technologies, Inc., Charlotte, NC (US);

Kobe Steel, Ltd., Kobe, JP;

Inventors:

Haruyasu Michishita, Charlotte, NC (US);

Koji Tokuda, Kobe, JP;

Tsuyoshi Mimura, Kobe, JP;

Katsuma Fujiwara, Kobe, JP;

Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C21B 13/12 (2006.01); C21B 13/00 (2006.01);
U.S. Cl.
CPC ...
C21B 13/12 (2013.01); C21B 13/002 (2013.01); C21B 2100/60 (2017.05); C21B 2300/02 (2013.01);
Abstract

According to embodiments, disclosed is a method and system to maintain the soft and sparse slag characteristic favorable for an electric arc to efficiently transfer the energy to molten iron with the power input per furnace area higher than 600 KW/m2 while keeping FeO amount less than 5% in the slag and carbon amount higher than 2.5% in the product hot metal at a DRI melting furnace.


Find Patent Forward Citations

Michishita, Haruyasu. (2025). Hot metal production from dri with electric arc heating (U.S. Patent No. 12497668). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12497668

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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