|FELICIANO-BRUZUAL Cristobal||Macquarie University|
|Spoluautoři MATTHEWS John A.|
The global iron and steel industry is currently under great pressure to reduce its emissions of greenhouse gases, and in particular CO2, which arise from the use of large quantities of coking coal in the standard process. In the medium and long term, the injection of small particles of charcoal produced from biomass (biochar) through the tuyerees in blast furnaces, here called Bio-PCI (Bio-Pulverized Carbon Injection), offers attractive features from the environmental and metallurgical point of view. Biochar presents advantages based on its being a renewable, carbon-neutral reductant and on its imparting fewer impurities to the finished product than coke derived from fossil fuel. Its widespread dissemination is at present restricted by the low price paid by iron and steel producers for conventional coke, in the absence of any carbon price – but this situation could change soon, as the costs of the principal processing inputs increases (coal, coke and iron ore) increase, and the prospects for a carbon tax (or price on carbon) are enhanced. In this paper, we give a technological and metallurgical summary of the potential benefits of Bio PCI in the iron and steel industry and key limitations to its deployment from the technical and economic point of view.