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Lebedinsky iron ore deposit is an iron ore deposit in the Belgorod Oblast, near the city of Gubkin, on the territory of the Staro-Oskolsky iron ore region of the Kursk Magnetic Anomaly, which is on the balance sheet of Lebedinsky GOK OAO. It was discovered in 1956, the development of rich iron ores has been carried out since 1959, since 1973 a ...
Siderite is a mineral composed of iron(II) carbonate (FeCO 3).Its name comes from the Ancient Greek word σίδηρος (sídēros), meaning "iron".A valuable iron ore, it consists of 48% iron and lacks sulfur and phosphorus.
Although channel iron deposits are typically low-grade at 53% to 57% Fe in-situ, they are composed of goethite-limonite which are hydrated iron oxide species. Ore typically contains around 8% to 12% water, and <5% SiO 2, and <3% Al 2 O 3. The hydrous iron oxides can be calcined, and the CID ore on a volatile-free basis is around 63% Fe or more.
The above classification scheme is the most commonly used and accepted, though sometimes an older system is used which divides iron-rich sedimentary rocks into three categories: bog iron deposits, ironstones, and iron formations. A bog-iron deposit is iron that formed in a bog or swamp through the process of oxidation.
This was necessary as naturally rich iron ores (containing over 50% iron) were being depleted. The development of pelletizing fine magnetite ores, which typically have less than 44 mm in size and are around 85% iron, began around 1943 with support from the University of Minnesota. The process was later adopted in Europe, particularly in Sweden ...
Martian spherules (also known as hematite spherules, blueberries, & Martian blueberries) are small spherules (roughly spherical pebbles) that are rich in an iron oxide (grey hematite, α-Fe 2 O 3) and are found at Meridiani Planum (a large plain on Mars) in exceedingly large numbers.
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Cast iron development lagged in Europe because wrought iron was the desired product and the intermediate step of producing cast iron involved an expensive blast furnace and further refining of pig iron to cast iron, which then required a labor and capital intensive conversion to wrought iron.
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