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VERSION:2.0
METHOD:PUBLISH
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ORGANIZER;CN=ESTAD 2023:mailto:info@metec-estad.com
LOCATION:Room 14a
SUMMARY:Monitoring the H2-plasma reduction of iron ores with optical emission spectroscopy
DESCRIPTION:Hydrogen plasma smelting reduction (HPSR) has the potential to be a viable solution for both reducing metal-bearing oxides and treatment of metallurgical sidestreams for metal recovery. However, thermal plasmas are known for their erratic and sometimes unpredictable behavior where the plasma may e.g. jump from place to place or have circular movement from side to side around the furnace. Furthermore, plasmas are highly dynamic entities, as their properties change rapidly depending on, to name a few, the plasma composition, electron density, and length. Since the composition of the ore will change in the reduction process, the plasma’s properties will also change during the smelting reduction. The need for online in situ process control is evident to keep the metallurgical process and the application of plasma aligned with the desired end-product reduction degree, composition, and quality.

To address the demand for process control, the reduction of iron ore was studied at two lab-scale HPSR set-ups at the Montanuniversität Leoben and Max Planck Institute for Iron Research together with a demonstration-scale facility at K1-MET GmbH. Optical emission spectroscopy (OES) was used to provide a qualitative outlook on the HPSR process from an OES point of view by looking at the radiating species within the plasma and linking them to what is happening inside the furnace. As a measurement method, OES offers a way to monitor the plasma's composition, temperature, electron density, and other characteristics from a distance so that the plasma is not affected by the measurement itself. Since the focus is on process control, the aspects of OES as a process control tool to monitor the plasma are discussed.

CLASS:PUBLIC
DTSTART:20230615T100000
DTEND:20230615T102000
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