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sedimentary rock shale containing cubes of pyrite and veins of quartz. width of sample 8 cm. tug 1608 2799. pyrite is an iron sulfide. sulfur managed to combine with iron because its strongest competitor oxygen was nowhere to be found. oxygen was consumed by decomposing organic matter or maybe we should say it the other way 2020. 3. 26. Magnetite and hematite are iron oxides; however, the extraction of iron from an iron oxide involves a series of steps that begins when mined iron ore is crushed into smaller pieces by a crusher and then washed. The second step in the process is calcination or roasting of the ore, which removes certain impurities, carbon dioxide and other substances. 2021. 3. 16. Commonly, the presence of iron is determined to be within a rock due to certain colorations from oxidation. Oxidation is the loss of electrons from an element. Oxidation can occur from bacteria or by chemical oxidation. 2021. 4. 2. Iron ores are rocks and minerals from which metallic iron can be economically extracted. The ores are usually rich in iron oxides and vary in color from dark grey, bright yellow, or deep purple to rusty red. The iron is usually found in the form of magnetite (Fe 3 O 4, 72.4% Fe), hematite (Fe 2 O 2009. 5. 22. People discovered that a high temperature coal fire could be used for the extraction of iron from iron ore. The discovery of electricity at the beginning of the nineteenth century allowed the extraction of the more reactive metals. Aluminium has been extracted on a 2020. 8. 14. Pieces of cast iron were placed on a finery hearth, on which charcoal was being burned with a plentiful supply of air, so that carbon in the iron was removed by oxidation, leaving semisolid malleable iron behind. 2011. 4. 5. When exposed to air in the pressure tank or atmosphere, the water turns cloudy and a reddish brown substance begins to form. This sediment is the oxidized or ferric form of iron that will not dissolve in water. Health. Iron is not hazardous to health, but it 
how is iron separated from rock
How Is Iron Extracted From the Earth? Reference
Iron-rich sedimentary rocks Wikipedia
Iron ore Wikipedia
Extraction Of Iron SlideShare
Iron processing Britannica
Iron in Drinking Water IDPH