Abstract
Iron and steel slag (ferrous slags) are a potential heat/energy source. The currently wasted heat of liquid slag during solidification in the range between more than 1600 and 1000°C should be used to generate hot air, steam or electricity. The main challenge is to solidify the liquid ferrous slag to achieve a good quality product while recovering the heat. The authors describe both the historical failures and the latest research efforts of the FEhS-Institute to recover heat from blast furnace (BF) slag as well as from steel slags.
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