The following describes operations at the National Steel Pellet Company, an iron ore mining and. processing facility located on the Mesabi Iron Range of Minnesota. Creating steel from lowgrade iron ore requires a long process of mining, crushing, separating, concentrating, mixing, pelletizing, and. shipping.
Limonite: an iron oxide used as pigment and iron ore Geology. Limonite has been used as a lowquality iron ore for thousands of years. Commercial mining of limonite as a source of iron is no longer done in areas where reasonable deposits of hematite and magnetite are present or readily imported.