Carbon Dioxide Sequestration with Steelmaking Slag: Process Feasibility and Reactor Design


The goal of this research is to develop a functional sequestration process using steelmaking slag for permanent capture of carbon dioxide emitted from steelmaking offgas. A parallel benefit of this process is rapid chemical stabilization of the slag minerals with reduced swelling or leaching potential. This paper summarizes the results of the project including mineralogical features of carbonate formation in steelmaking slag, study of the reaction mechanisms, thermogravimetric analysis of the reaction between solid-state slag and CO2, design and testing of a two-stage lab scale reactor system, METSIM modeling of possible reactor designs, and exploration of the economic feasibility of the process based on operating costs, metals recovery and credit for CO2 sequestration.

Meeting Name

AISTech 2008 (2008: May 5-8, Pittsburgh, PA)


Materials Science and Engineering

Research Center/Lab(s)

Peaslee Steel Manufacturing Research Center

Keywords and Phrases

CO2; Metal Recovery; Metallurgy; Reactor

Document Type

Article - Conference proceedings

Document Version


File Type





© 2008 Association for Iron & Steel Technology (AIST), All rights reserved.

Publication Date

08 May 2008

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