(19)
(11) EP 4 824 294 A1

(12)

(43) Date of publication:
21.10.2026 Bulletin 2026/43

(21) Application number: 24904592.3

(22) Date of filing: 24.10.2024
(51) International Patent Classification (IPC): 
C21B 13/02(2006.01)
C21B 13/14(2006.01)
 C21B 13/00(2006.01)
(52) Cooperative Patent Classification (CPC):
C21B 13/0073; C21B 13/02; C21B 2100/26; C21B 2100/66; C21B 2100/64; Y02P 10/134
(86) International application number:
PCT/US2024/052711
(87) International publication number:
WO 2025/128211 (19.06.2025 Gazette 2025/25)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA
Designated Validation States:
GE KH MA MD TN

(30) Priority: 14.12.2023 US 202363610007 P
22.10.2024 US 202418922572

(71) Applicant: Midrex Technologies, Inc.
Charlotte, North Carolina 28208 (US)

(72) Inventors:
  • MICHISHITA, Haruyasu
    Charlotte, NC 28208 (US)
  • HATAKEYAMA, Taiji
    Charlotte, NC 28208 (US)

(74) Representative: dompatent 
Partnerschaft von Patentanwälten und Rechtsanwälten mbB Deichmannhaus am Dom Bahnhofsvorplatz 1
50667 Köln
50667 Köln (DE)

   


(54) METHOD AND SYSTEM FOR REMOVING CARBON DEPOSIT AT ELECTRIC HEATING SYSTEM IN A DIRECT REDUCTION PLANT UTILIZING HYDROGEN OR NATURAL GAS