... Specification of Dark Grey Spherical Passivation Mg Powder:2-0.21mm(10-65 meshes), 0.85-0.18mm ... 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 ... CaO based desulfuration agent, the mixing proportion is: 10-25%, 90-75%, a small quantity of ...