Recycling and environmental issues of metallurgical slags and salt fluxes (original) (raw)

In general, steel production has the following two routes: using iron ore as raw material in Blast Furnace(BF) for ironmaking, basic oxygen steelmaking (BOF) for steel converting, and secondary metallurgical process (SMP) for steel refining; using scrap based material in electric arc furnace (EAF) for steel making and secondary metallurgical process (SMP) for refining. Correspondingly, slags can be classified as three major types: BF slag, BOF slag and SMP slag. The BF slag accounts for about twice the amount of BOF slag, and the SMP slag is relatively less significant in terms of utilization due to the lower generated amount. Roughly BOF slag, EAF slag and SMP slag can be defined as steel slags.