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Accelerated Mineral Carbonation Of Stainless Steel Slags For Co2 Storage And Waste Valorization: Effect Of Process Parameters On Geochemical Properties, Rafael M. Santos, Jens Van Bouwel, Ellen Vandevelde, Gilles Mertens, Jan Elsen, Tom Van Gerven
Accelerated Mineral Carbonation Of Stainless Steel Slags For Co2 Storage And Waste Valorization: Effect Of Process Parameters On Geochemical Properties, Rafael M. Santos, Jens Van Bouwel, Ellen Vandevelde, Gilles Mertens, Jan Elsen, Tom Van Gerven
Faculty Publications and Scholarship
This work explores the mineral carbonation of stainless steel slags in search for a technically and economically feasible treatment solution that steers these waste residues away from costly disposal in landfills and into valuable applications. Argon Oxygen Decarburization (AOD) and Continuous Casting (CC) slags prove ideal for mineral carbonation as their powdery morphology forgoes the need for milling and provides sufficient surface area for high reactivity towards direct aqueous carbonation. Experiments were undertaken using two methodologies: unpressurized thin-film carbonation, and pressurized slurry carbonation. The influence of process parameters (temperature, CO2 partial pressure, time, solids loading) on the slag carbonation conversion …
Stabilization Of Basic Oxygen Furnace Slag By Hot-Stage Carbonation Treatment., Rafael M. Santos, Da Ling, Amin Sarvaramini, Muxing Guo, Jan Elsen, Faïçal Larachi, Georges Beaudoin, Bart Blanpain, Tom Van Gerven
Stabilization Of Basic Oxygen Furnace Slag By Hot-Stage Carbonation Treatment., Rafael M. Santos, Da Ling, Amin Sarvaramini, Muxing Guo, Jan Elsen, Faïçal Larachi, Georges Beaudoin, Bart Blanpain, Tom Van Gerven
Faculty Publications and Scholarship
Treatment and disposal of Basic Oxygen Furnace (BOF) slag, a residue of the steel production process characterized by high basicity and propensity for heavy metal leaching, is a costly burden on metallurgical plants; a sustainable valorization route is desired. The stabilization of BOF slag utilizing hot-stage carbonation treatment was investigated; this approach envisions carbonation during the hot-to-cold pathway followed by the material after the molten slag is poured and solidified. Three experimental methodologies were employed: (i) in-situ thermogravimetric analyzer (TGA) carbonation was used to assess carbonation reaction kinetics and thermodynamic equilibrium at high temperatures; (ii) pressurized basket reaction carbonation was …