It is suitable to be used as the additive in steelmaking and iron-casting, or as the intermediate alloy of rare earth. It can also serve as the inoculant of gray casting iron, ductile casting iron and vermicular casting iron. It is the important additive in all kinds of inoculant, nodulizing and vermiculazing agent. Nodulizers are added in liquid cast iron to promote the formation of spheroidal graphite. Nodulizers are ferro-silicon alloys containing magnesium with, when needed, rare-earth elements.