The difference between pig iron powder and reduced iron powder

Reducing iron powder popular is the use of iron powder reduction method, also called reduced iron powder (pure iron), a highly reactive iron powder, because of strong reducibility, oxidizing reaction easily, even slightly heating in air will burn, because this kind of its features, often used in welded rails chemical reduction to prevent the oxidation of iron powder, refers to the pig iron grinding into powder, and pig iron is the carbon content is more than 2% of ferroalloys.