... steel.Specification of Dark Grey Spherical Passivation Mg Powder:2-0.21mm(10-65 meshes), 0.85 ... passivation magnesium powder.Content of granularity, loose density, Mg, CaO, CaF2, MgO, P, S and H2O ... of magnesium based desulfuratioin agent must be provided.Mg based desulfuration agent is generally mixed used ... is around 1280±30°C.After blowing in Mg based desulfuration agent, temperature of molten iron ...