Dry slag granulation is destined to replace conventional water granulation of molten slags in the not too distant future, creating a paradigm shift in the history of slag treatment. In this dry process, molten slag is atomised under centrifugal forces on a spinning disc and the slag droplets generated are quenched and solidified quickly using air. The process produces solid slag granules with added value (eg granulated blast furnace slag for cement) and could potentially recover high grade waste heat as hot air at 500 - 600C for on-site utilisation (such as drying, preheating, or steam generation). Compared with conventional wet granulation, the dry slag granulation process offers a more sustainable approach for processing molten slags through saving water, reducing pollution, as well as recovering waste heat to reduce energy consumption, hence GHG emissions._x000D_
FORMAL CITATION:Xie, D, Jahanshahi, S and Norgate, T, 2010. Dry granulation to provide a sustainable option for slag treatment, in Proceedings Sustainable Mining 2010, pp 22-28 (The Australasian Institute of Mining and Metallurgy: Melbourne).