System and method for feeding an electric furnace

EP4662450A1Pending Publication Date: 2025-12-17HATCH LTD
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Patent Information

Application Number
EP2024752605
Authority / Receiving Office
EP · EP
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-02-08
Filing Date
2024-02-08
Publication Date
2025-12-17

AI Technical Summary

Technical Problem

Current electric furnace feeding systems face inefficiencies due to the separate charging of direct reduced iron (DRI), reductants, and fluxes, which can lead to oxidation, excess materials, and inconsistent reactions, affecting the carbon intensity and overall efficiency of the iron reduction process.

Method used

A method and system for combining DRI, reductants, and fluxes into a homogeneous mixture upstream of the electric furnace, using a feed collection and mixing unit to create a thermally and compositionally uniform feed, which is then charged to the furnace, reducing excess materials and oxidation, and allowing for less carbon-intensive iron reduction processes.

Benefits of technology

The homogeneous feed mixture ensures consistent composition and thermal distribution across the furnace, minimizing variations in reactions and reducing carbon intensity, thereby enhancing the efficiency and stability of the iron reduction process.

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Abstract

A method and system are provided for feeding a feed mixture into an electric furnace. The method comprising producing a homogeneous feed mixture and charging the furnace with the homogeneous feed mixture. The homogeneous feed mixture, being one or both of compositionally and thermally homogeneous, includes DRI, and one or more of fluxes, scrap, reductants and reverts, used to charge electric furnaces. The system comprises a mixing unit for combining feed components into a homogeneous mixture. The mixing unit may be a screw conveyor. The mixing unit is connected to the furnace to charge the furnace with the homogeneous feed mixture.
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