Characterization of Hydrogen DRI Samples From ZESTY Process

The ZESTY ironmaking process involves the use of Calix’s flash calcination technology to reduce iron ore fines to iron in a hydrogen atmosphere between 600 and 1,050°C. In 2022, Calix ran a series of proof-of-concept campaigns at their pilot plant facility using a range of iron ores, particle sizes, temperatures and hydrogen flowrates at throughputs up to 100 kg/h in semi-continuous mode. Detailed XRD, SEM-EDS, optical microscopy and chemical analysis of the samples revealed key aspects of the process, showing that Hematite-Goethite ores could be readily metallized. Calix successfully made a DRI product close to commercial grade.

Authors:

Dr Bintang Nuraeni | Swinburne University of Technology
 

Ms Isis Ignacio | Swinburne University of Technology
 

Professor Geoffrey Brooks | Swinburne Univesity of Technology
 

Mr Deddy Nababan | Swinburne University of Technology
 

Professor M. Akbar Rhamdhani | Swinburne Univesity of Technology
 

Dr Matt Boot-Handford | Calix Ltd.
 

Dr Yun Xia | Calix Ltd.
 

Mr Tom Dufty | Calix Ltd.
 

Dr Mark Sceats | Calix Ltd.
 

Session Chairs:

Chris Pistorius | Carnegie Mellon University
 

Sara Hornby | Global Strategic Solutions, Inc. (GS2i)