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VERSION:2.0
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METHOD:PUBLISH
BEGIN:VEVENT
DTSTAMP:20260626T112502Z
UID:https://www.mpie.de/events/46091/2768772
DTSTART:20260708T130000Z
DTEND:20260708T140000Z
CLASS:PUBLIC
CREATED:20260625T110000Z
DESCRIPTION:The growing demand for sustainable ironmaking and steel refinin
 g technologies has intensified the need for efficient utilization of indus
 trial fines and low-grade resources. In the present study\, waste iron ore
  fines and lime fines were utilized to produce highly fluxed iron ore pell
 ets and their potential application in molten pig iron refining was system
 atically investigated. Pellets with varying basicity were prepared and har
 dened at elevated temperatures to evaluate their phase evolution\, mechani
 cal properties\, reducibility\, and refining performance.Mineralogical cha
 racterization revealed hematite as the dominant phase in the iron ore\, wh
 ile increasing pellet basicity promoted the formation of calcium ferrite a
 nd dicalcium ferrite phases. The development of calcium ferrite significan
 tly enhanced pellet strength\, with pellets fired at 1200°C exhibiting st
 rengths exceeding 500 kg/pellet. Reduction studies carried out under both 
 carbonaceous and hydrogen atmospheres demonstrated that pellet basicity st
 rongly influenced reduction kinetics and metallization behavior. Hydrogen 
 reduction resulted in superior reducibility\, achieving up to 90% reductio
 n\, and produced characteristic iron whisker morphologies that facilitated
  rapid oxygen removal.The performance of partially and highly reduced flux
 ed pellets was further evaluated for impurity removal from molten pig iron
  during electric arc\, induction\, and plasma-assisted melting operations.
  Thermodynamic and kinetic analyses revealed that the removal efficiencies
  of silicon\, manganese\, phosphorus\, sulfur\, and carbon were strongly d
 ependent on the reduction degree of the fluxed pellets. Highly reduced pel
 lets exhibited enhanced desulfurization capability\, while partially reduc
 ed pellets were found to be more effective for phosphorus removal. Plasma-
 assisted refining under hydrogen atmosphere demonstrated remarkable impuri
 ty removal efficiencies\, particularly for carbon\, silicon\, and sulfur.T
 he study establishes a sustainable pathway for the valorization of iron or
 e and lime fines through the production of highly fluxed direct reduction 
 pellets. The findings demonstrate that appropriately engineered fluxed pel
 lets can serve not only as iron-bearing feedstock but also as multifunctio
 nal refining agents for efficient impurity removal during secondary steelm
 aking operations\, contributing to resource conservation and low-carbon ir
 onmaking.\nSpeaker: Dr Raj Kumar Dishwar 
LAST-MODIFIED:20260625T110623Z
LOCATION:Max Planck Institute for Sustaianble Materials \, Room: Big semina
 r room
ORGANIZER;CN=on invitation of Prof. Dierk Raabe:mailto:
SUMMARY:Hydrogen Plasma Refining Coupled with Solid-State Reduction for Sus
 tainable Ironmaking: Hydrogen Plasma Refining Coupled with Solid-State Red
 uction for Sustainable Ironmaking
URL;VALUE=URI:https://www.mpie.de/events/46091/2768772
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