K1-MET ǀ 2020-11-13 ǀ 1 Johannes Rieger, K1-MET 2020-11-13 ESTEP workshop “Resi4Future” Co-authors: Wolfgang Reiter (K1-MET), Harald Raupenstrauch (Montanuniversität Leoben), Laura Lohmeier, Hans-Werner Schröder (both TU Bergakademie Freiberg), Christoph Thaler (voestalpine Stahl) Solutions for internal recycling of steelmaking dusts and sludges
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K1-MET ǀ 2020-11-13 ǀ 1
Johannes Rieger, K1-MET
2020-11-13
ESTEP workshop “Resi4Future”
Co-authors: Wolfgang Reiter (K1-MET), Harald Raupenstrauch (Montanuniversität Leoben), Laura Lohmeier, Hans-Werner Schröder (both TU Bergakademie Freiberg), Christoph Thaler (voestalpine Stahl)
Solutions for internal recycling of steelmaking dusts and sludges
K1-MET ǀ 2020-11-13 ǀ 2
(1) K1-MET in a glance
• Research on residue treatment and recycling solutions
(2) Treatment of BOF dust for internal recycling
• Project partners and methodology
(3) Treatment of DR dusts and sludges for internal recycling
• Project partners and methodology
• Process concept
(4) Summary and outlook
• Next steps in the process developments
Agenda
K1-MET ǀ 2020-11-13 ǀ 3
K1-MET in a glance
Research Areas
Four symbiotic areas:
➢ Area 1: Raw Materials and Recycling
• Endeavours the best possible utilisation of all resources and
searches for residue treatment and recycling solutions
➢ Area 2: Metallurgical Processes
• Unites the core topics of metallurgical process
developments.
➢ Area 3: Low Carbon Energy Systems
• Is dedicated to the developments of carbon-lean steal
production.
➢ Area 4: Simulation and Analyses
• Represents the enveloping area for numerical developments
and data analyses.
K1-MET ǀ 2020-11-13 ǀ 4
K1-MET Research Area 1
Recycling of residues from primary steelmaking
Blast Furnace –
Basic Oxygen Furnace
MIDREX® Direct
Reduction Process
K1-MET ǀ 2020-11-13 ǀ 5
(1) K1-MET in a glance
• Research on residue treatment and recycling solutions
(2) Treatment of BOF dust for internal recycling – RecoDust process
• Project partners and methodology
(3) Treatment of DR dusts and sludges for internal recycling
• Project partners and methodology
• Process concept
(4) Summary and outlook
• Next steps in the process developments
Agenda
K1-MET ǀ 2020-11-13 ǀ 6
Treatment of BOF dust for internal recycling
RecoDust (Flash-Reactor)
K1-MET ǀ 2020-11-13 ǀ 7
Small-scale lab trials [1]
- Conveying behaviour of BOF dust
Computational Fluid Dynamics [2]
- Gas-solid reaction kinetics
- Design studies for reactor and burner
Pilot plant operation [1]
(Flash-Reactor)
- BOF dust treatment
- Definition of process
parameters
RecoDust Process
Project partners and methodology
[1] Montanuniversität Leoben, Chair of Thermal Processing Technology
[2] K1-MET
Project
partners
K1-MET ǀ 2020-11-13 ǀ 8
Reduction/slaggingT ~ 1,700 °C
λ = 0.7
DosingT ~ 40 °C
Steps of the RecoDust process Way of BOF dust within the