Science Target Conference Systems, Ajman 4th International Environment Conference 2016

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Sustainable Low Emission Iron And Steel Production In Ghana
Crentsil Kofi Bempah, Juliana Bempah

Last modified: 2015-11-19

Abstract


The iron and steel sector is the largest industrial energy consumer and largest emission source of greenhouse gases (GHGs) and primary air pollutants. With the growing concern over climate change, steel makers are faced with the challenge of finding ways of lowering CO2 emissions without seriously undermining process efficiency or considerably adding to costs. In this paper we analyze the cost effectives of implementing low emission measures that jointly reduce greenhouse gas emissions and primary air pollutants. For this purpose we construct MACCs (marginal abatement cost curves) that contain potentials and costs of low emission measures. Two major iron-making technologies, the induction melting furnace (IMF) and electric arc furnace (EAF) are comparatively assessed in this work. The cost effectiveness was conducted by: estimating the annual CO2 reduction capacity of each measure; estimation of the total operational costs or investment for each pollution abatement measure and calculating and ranking of possible pollution abatement measures based on their cost-effectiveness ($ per year reduced kg CO2). The result was used to construct marginal abatement cost curves (MACCs). The results revealed that, near net shape casting thin slab was the most cost effective alternative climate and air pollution abatement measure. For the assessment of the current cost effective CO2 abatement measures, IMF was found to be the most cost-effective production route compared to EAF. Hence, the implementation of these measures will be critical to reach the environmental objectives of low emission iron and steel production.