
#redirect Iron ore
[[Image:LightningVolt Iron Ore Pellets.jpg|thumb|right|250px|This heap of iron ore pellets will be used in steel production.]] Iron ores are minerals from which metallic iron can be extracted. The iron itself is usually found in the form of magnetite (Fe3O4) or hematite (Fe2O3), both of which are iron oxides. However, as much of the pure magnetite and hematite ore has already been mined, modern iron mines rely on aggregate ores such as taconite, which must be processed to remove non-iron-bearing components prior to smelting. Iron mines therefore produce tremendous amounts of waste. In the Minnesota mines most of the waste material known as tailings is stored in large holding basins. Iron ore is common worldwide, but commercial mining operations are dominated by eight countries: Australia, Brazil, China, India, Russia, Ukraine, South Africa and the United States. World production averages one billion metric tons of raw ore annually. Most iron ore is used in the production of steel. Economic geology
--These large tailings basins pose future environmental problems-- This statement has been removed, the basins in MN have been regularly tested and shown not to pose any threat other than taking up large areas of land. The materials that make up the tailings are the same as what was mined less the iron. There is little added that is not removed before being deposited in the basin. The areas of land taken up by these basins have become animal sanctuaries. At HibbTac, a mine near the city of Hibbing there are 4 bald eagles living in the basin, as well as moose, deer, geese, duck, fox, and many wild animals from the area that have found a sanctuary from man, as trespassers are not aloud on property and guns are banned. The goose population out there right now is larger than most other groups of geese in the region. The size of the basin is roughly 16miles in diameter so well large in size the amount of wild life per acre is greater than most forest regions. In there testing process they have been found to contain no carcinogens, and minimal to no toxicity. The basins of the outher mines in the regons are very similer to this one. To say they pose an environmental problem seams to be an assumption based only on the fact that it is industry. Its just a place to store the remaining rock that didn’t get turned into pellets. :Hmm... got references to back that up? A 160 - 200 sq. mi. ''pond'' of ground up rock is going to have an environmental impact. Will it be a ''problem'' for ground water quality ...? I don't know. Was there an environmental impact study? Studies by non-industry scientists? User:Vsmith 03:24, 10 Jun 2005 (UTC) :I will contact the material testing firm that has dune much of the testing and see if I can get some results, I wont be able to do it right a way but shouldn’t take to long. I also will look into an environmental impact study. I guess mostly my point isn’t that it is a non threat, but more that its persons causing any damage is all the damage there ever will be. :The pond of ground rock is more water than rock. They use water to flow the tailings out into the basin from the mine. The flow enters onto a portion of the basin that has a 25 to 20 ft elevation difference than the rest. The water is then directed across a dame into a lower portion of the basin dropping in elevation around 5 ft. The Course tailings are filtered out at this point and let behind. They then use these course tailings to maintain the parameter damns. The water is then directed across another damn into another portion of the basin again at a lower elevation filtering out more materials. There are 4 such holding ponds with the last one containing a pumping station that pumps water back to the mine to repeat the process. Over time the water level rises and they use the course tailings to raise the dam. The final portion is 80ft deep of water that supports northern pike and walleye. This is only off of personal experience as I have worked on these damns. Ill look into getting some study data for you.
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Words begining with Iron_ore:
Iron-ore
Iron_Ore
Iron_ore
Iron_ore
Iron_ore_trade_during_World_War_II
Iron Ore
#redirect Iron ore
Iron ore
[[Image:LightningVolt Iron Ore Pellets.jpg|thumb|right|250px|This heap of iron ore pellets will be used in steel production.]] Iron ores are minerals from which metallic iron can be extracted. The iron itself is usually found in the form of magnetite (Fe3O4) or hematite (Fe2O3), both of which are iron oxides. However, as much of the pure magnetite and hematite ore has already been mined, modern iron mines rely on aggregate ores such as taconite, which must be processed to remove non-iron-bearing components prior to smelting. Iron mines therefore produce tremendous amounts of waste. In the Minnesota mines most of the waste material known as tailings is stored in large holding basins. Iron ore is common worldwide, but commercial mining operations are dominated by eight countries: Australia, Brazil, China, India, Russia, Ukraine, South Africa and the United States. World production averages one billion metric tons of raw ore annually. Most iron ore is used in the production of steel. Economic geology
Iron ore
--These large tailings basins pose future environmental problems-- This statement has been removed, the basins in MN have been regularly tested and shown not to pose any threat other than taking up large areas of land. The materials that make up the tailings are the same as what was mined less the iron. There is little added that is not removed before being deposited in the basin. The areas of land taken up by these basins have become animal sanctuaries. At HibbTac, a mine near the city of Hibbing there are 4 bald eagles living in the basin, as well as moose, deer, geese, duck, fox, and many wild animals from the area that have found a sanctuary from man, as trespassers are not aloud on property and guns are banned. The goose population out there right now is larger than most other groups of geese in the region. The size of the basin is roughly 16miles in diameter so well large in size the amount of wild life per acre is greater than most forest regions. In there testing process they have been found to contain no carcinogens, and minimal to no toxicity. The basins of the outher mines in the regons are very similer to this one. To say they pose an environmental problem seams to be an assumption based only on the fact that it is industry. Its just a place to store the remaining rock that didn’t get turned into pellets. :Hmm... got references to back that up? A 160 - 200 sq. mi. ''pond'' of ground up rock is going to have an environmental impact. Will it be a ''problem'' for ground water quality ...? I don't know. Was there an environmental impact study? Studies by non-industry scientists? User:Vsmith 03:24, 10 Jun 2005 (UTC) :I will contact the material testing firm that has dune much of the testing and see if I can get some results, I wont be able to do it right a way but shouldn’t take to long. I also will look into an environmental impact study. I guess mostly my point isn’t that it is a non threat, but more that its persons causing any damage is all the damage there ever will be. :The pond of ground rock is more water than rock. They use water to flow the tailings out into the basin from the mine. The flow enters onto a portion of the basin that has a 25 to 20 ft elevation difference than the rest. The water is then directed across a dame into a lower portion of the basin dropping in elevation around 5 ft. The Course tailings are filtered out at this point and let behind. They then use these course tailings to maintain the parameter damns. The water is then directed across another damn into another portion of the basin again at a lower elevation filtering out more materials. There are 4 such holding ponds with the last one containing a pumping station that pumps water back to the mine to repeat the process. Over time the water level rises and they use the course tailings to raise the dam. The final portion is 80ft deep of water that supports northern pike and walleye. This is only off of personal experience as I have worked on these damns. Ill look into getting some study data for you.
See other meanings of words starting from letter:
I
IA | IB | IC | ID | IE | IF | IG | IH | IJ | IK | IL | IM | IN | IO | IP | IR | IS | IT | IU | IW | IX | IY | IZ |Words begining with Iron_ore:
Iron-ore
Iron_Ore
Iron_ore
Iron_ore
Iron_ore_trade_during_World_War_II
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