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ORGANIZER;CN=ESTAD 2023:mailto:info@metec-estad.com
LOCATION:Room 14b
SUMMARY:Tenova’s iBlue open slag bath furnace design: Fundamental design decisions for a DRI melter
DESCRIPTION:With the global steelmaking industry’s focus on the decarburization of the steel making process, Tenova has developed iBlue®, a novel technology that combines conventional smelting furnaces with the Energiron® Direct Reduction technology - jointly developed by Tenova and Danieli - to replace the blast furnace process, using low grade pellets (± 62% FeO) as virgin iron sources.
To maximize the yield of the hot metal produced, and provide operators with a flexible plant design that can cater for a wide range of inputs, key design decisions are required to ensure an optimal flow sheet.

This paper explains in detail the decision making process in the DRI melter design, touching on raw material feed requirements, metal handling, carbon balancing, electrical system design and management of the off gasses produced in the reducing atmosphere. These concepts will be evaluated from both a control volume and process design point of view.
The conduction of the melter process is closely connected to the DRI production process and there are substantial benefits in the interconnection of the ENERGIRON® plant and the melter from an overall quality and efficiency perspectives.
The paper analyzes the benefits of a closed furnace design for this application, as it operates in a reducing environment, allowing for minimal losses of FeO to the slag. Lastly, slag conditioning and management is described: matching the chemical composition requirements for the cement industry (not possible using an EAF) is a key benefit of this solution which can be truly considered as the evolution of the blast furnace technology.

Key Words

Hydrogen, DRI, HBI, BF, BOF, EAF, FMF, H2, reducing gas, carbon footprint, decarburization, ENERGIRON ZR, CCS, CCU, smelting reduction furnace, OSBF, ENERGIRON

CLASS:PUBLIC
DTSTART:20230614T153000
DTEND:20230614T155000
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