Different Types of Iron Ore - Mineral Processing / MetallurgyOct 5, 2016 . Ankerite is a carbonate of lime, magnesia, manganese, and iron. It is of valuable composition, carries only 14 or 15% of iron, and is used more.classification and types of iron ores,Iron ore - WikipediaIron ores are rocks and minerals from which metallic iron can be economically extracted. . Iron-ore mining methods vary by the type of ore being mined.