Table 1: Chemical composition of iron and steel slag (wt. %) [63].

Furnace Type CaO SiO2 Al2O3 MgO MnO TiO2 FeO P2O5 Cr2O3 Fe2O3
BFS 30-56 28-38 8-24 1-18 0.5-2 na 0.5-1 na na na
BOFS 30-55 8-20 1-6 5-15 2-8 0.4-2 10-35 ≤ 2 ≤ 0.73 na
EAFS 30-50 11-20 10-18 8-13 5-10 na 8-22 2-5 na 5-6
LFS 30-60 2-35 5-35 1-10 0-5 na 0.1-1.5 ≤ 0.9 ≤ 0.73 na