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Basic oxygen furnace slag (BOF slag) is an unavoidable by-product of steelmaking process of basic oxygen furnace. The main chemical constituents of BOF slag are CaO, FeO, Al 2 O 3 , SiO 2 and MgO. Due to its high metallic value (FeO: 16-20%) and lime content (CaO: 45-50%), it is possible to use in iron making and steelmaking process to replace lime and recover iron and CaO. But it also contains some P 2 O 5 around 2 -3% which is too high for recycling. The objective of this study is todoi:10.3390/su10020284 fatcat:zwvdet67zjendptmtpnu5qii2i