Method for heating a steel coil and installation thereof
Induction heating of inert gas within a pipe to heat steel coils addresses inefficiencies and emissions in existing methods, providing faster and more efficient heating with reduced CO2 output.
WO2026104871A1PCT designated stage Publication Date: 2026-05-21ARCELORMITTAL SA
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Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- ARCELORMITTAL SA
- Filing Date
- 2024-11-13
- Publication Date
- 2026-05-21
AI Technical Summary
Technical Problem
Existing steel coil heating methods in batch annealing furnaces are inefficient, slow due to thermal inertia, and result in high CO2 emissions from combustion gases, necessitating a faster, more energy-efficient, and environmentally friendly alternative.
Method used
Induction heating using an electrically conductive insert within a pipe to heat an inert gas, which is then used to heat the steel coil, reducing the need for a protective cover and allowing for gas recycling and reuse.
Benefits of technology
The method achieves faster, more efficient heating with reduced CO2 emissions by using induction-heated inert gas, enhancing energy efficiency and homogeneity of heating.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure IB2024061265_21052026_PF_FP_ABST
Abstract
The invention relates to a method for heating a steel coil that comprises the following steps: - putting at least one steel coil to be heated inside a furnace, - introducing an entry gas flow into a device for heating gas, being connected to said furnace and comprising: o a pipe allowing gas to flow inside of it, o an insert located inside said pipe, being electrically conductive, o an inductor located in the vicinity of said pipe, - feeding energy into said insert using said inductor of said device for heating gas so that said energy fed into the insert is transferred to the gas introduced into said device for heating gas, to heat said gas to a temperature from 500°C to 1500°C, - releasing said heated gas into the furnace so that said steel coil is heated, - removing the heated steel coil from the furnace.
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