Carbstone: Sustainable Valorisation Technology for Fine Grained Steel Slags and CO2*
Revision
Volume 2, Issue 2, Pages 75-79
Abstract
A technology was developed to produce high strength building materials by treating slags with CO2 at elevated pressure (20 bar) and temperature (140 °C) without addition of binders. The carbonated materials can compete with concrete products (C35/C45) and have excellent environmental and technical properties. The materials have the additional advantage of sequestering 180 – 200 g CO2/kg slag. The process makes use of a unique combination of existing technologies commonly used in the construction industry. Building of a pilot installation for treatment of 10 000 t of slag per year is planned for the near future.
Keywords
Carbonation, steel slag, CO2, recycling
References
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© 2010 Göller Verlag
