Ironmaking Feedstock
By converting magnetite to a CaFe3O5 phase, the challenges of using magnetite in ironmaking are addressed, resulting in a stable, reactive, and compressively strong feedstock for efficient iron production with reduced CO2 emissions.
Patent Information
- Authority / Receiving Office
- AU · AU
- Patent Type
- Applications
- Current Assignee / Owner
- COMMONWEALTH SCI & IND RES ORG
- Filing Date
- 2019-05-03
- Publication Date
- 2026-07-16
AI Technical Summary
The current ironmaking processes face challenges in utilizing magnetite ores due to their high gangue mineral impurities and the need for carbon-intensive oxidation roasting, which results in inefficient reduction and high CO2 emissions, while hematite ores are becoming scarce and goethite ores are problematic for processing and transportation.
The production of an ironmaking feedstock comprising a solid CaFe3O5 phase (CWF) is achieved by reacting magnetite with a calcium source at elevated temperature under reducing conditions, which converts magnetite into the CWF phase, which avoids the need for the oxidation of magnetite to hematite prior to reduction, thereby improving the efficiency and reducing CO2 emissions.
The CWF phase provides a stable, reactive, and compressively strong feedstock suitable for ironmaking processes, with reduced friability and improved reducibility, enabling efficient iron production with lower carbon emissions.
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