The Important Factors to Consider When Investing in Iron Ore .
Apr 10, 2011 . Generally, iron ore falls into two categories, hematite and magnetite. . The beneficiation process for taconite requires crushing, screening, . This higher grade product, in turn, can fetch a significant premium .. These impurities are typically phosphorus "P", silica "SiO2", and aluminum sulfate "AL2SO4".Live Chat