Iron processing - Ores , Smelting, Refining: Iron ores occur in igneous, metamorphic (transformed), or sedimentary rocks in a variety of geologic environments. Most are sedimentary, but many have been changed by weathering, and so their precise origin is difficult to determine. The most widely distributed iron -bearing minerals are oxides, and iron ores consist mainly of hematite (Fe2O3), which is red; magnetite (Fe3O4), which is black; limonite or bog- iron ore (2Fe2O3·3H2O), which is brown ... The iron ore group of rocks are broadly classified into three based on their mode of origin as: (i) Iron Ore Group of clastic facies, (ii) Iron Ore Group of Transitional chemogenic facies and (iii) Iron Ore Group of volcanogenic facies. What is Iron Ore ? Iron Ore being excavated from an open pit mine. 5. Description Iron ore refers to rocks or minerals from which metallic iron is extracted for commercial use. These minerals appear dark grey to rusty red in color, and are usually rich in iron oxides. Iron occurs in these ores in the form of such chemical compounds as hematite, magnetite, siderite, limonite, or geothite. Even though iron is the fourth most common element within the earth’s crust, most of it is bound in the ... Iron Ore Prices: Iron ore futures experience a drop due to decreasing steel production in China, increased port inventories, and concerns over weak demand. Discover the latest impacts on the iron ...
