how do the iron industry make iron after diging it up?
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Back in the day (Aztecs), kings would have themselves a iron dagger made from a 'magic source'.  The Gods would send a flaming ball of it to the Earth to reward the kings.  Redirect:  Natural metallic iron is not typically found, so people have to use smelts to get it.  There are other sources on here that other people answered but I thought I would share this additional info.
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Because they're made out of magnetic material...iron I believe.
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Rust is the substance formed when iron compounds corrode in the presence of oxygen and water. It is a mixture of iron oxides and hydroxides. Rusting is a common term for corrosion, and usually corrosion of steel.\n\nIron is found naturally in the ore haematite as iron oxide, and metallic iron tends to return to a similar state when exposed to air, (hydrogen, oxygen, nitrogen, etc.) and water. This corrosion is due to the oxidation reaction when iron metal returns to an energetically favourable state. Energy is given off when rust forms. The process of rusting can be summarized as three basic stages: The formation of iron(II) ions from the metal; the formation of hydroxide ions; and their reaction together, with the addition of oxygen, to create rust.\n\nIron is the main component of steel and the corrosion of steel is observed more frequently, since iron is rarely used without alloying in the present day.\n\nWhen steel contacts water, an electrochemical process starts. On the surface of the metal, iron is oxidized to iron(II):\n\n    Fe → Fe2+ + 2e−\n\nThe electrons released travel to the edges of the water droplet, where there is plenty of dissolved oxygen. They reduce the oxygen and water to hydroxide ions:\n\n    4e− + O2 + 2H2O → 4OH−\n\nThe hydroxide ions react with the iron(II) ions and more dissolved oxygen to form iron oxide. The hydration is variable, however in its most general form:\n\n    Fe2+ + 2OH− → Fe(OH)2\n    4Fe(OH)2 + O2 → 2(Fe2O3.xH2O) + 2H2O\n\nHence, rust is hydrated iron(III) oxide. Corrosion tends to progress faster in seawater than fresh water due to higher concentration of sodium chloride ions, making the solution more conductive. Rusting is also accelerated in the presence of acids, but inhibited by alkalis. Rust can often be removed through electrolysis, however the base metal object can not be restored through this method.
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FeCl3 + NaCl -> FeCl2 + NaCl3\n\n\nFeCl3 + NaCl -> FeCl2 + NaCl3\n\nthese reactions are not possible \nas this reaction can take place if iron(fe) was more reactive than sodium or fe was less electropositive than na\nhence \nthese reactions are not possible
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Ferrous metals are those in the vicinity of iron on the Periodic table.  They aren't actually made, per se.  They were created as the end products of stars being made and decaying.  I forget the exact detail these days; but iron (element 55?) is the heaviest one that can be made by fusion in stars, and is in very low concentrations. Elements heavier than iron are made by particle capture, decay, and whatever else.\n\nIron is extracted from its ores by various means, depending on the ore
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Iron (like steel and certain alloys) contains atomic magnets or dipoles which can line up their 'magnetic axes' in a preferred direction.  In the magnetized state, all the magnetic axes will point in one specific direction, by which the iron filling will show polarity and hence be a magnet itself.\nWhen you heat the iron fillings, the high temperature makes the atoms to vibrate with increasing energy and this disturbs the dipoles and so the resultant magnetic axes point in their 'preferred' random directions, which keep changing due to the extra energy. If the iron fillings were magnetized before heating, all the magnetism would be lost. Magnetizing them after heating will not align the vigorously vibrating atomic magnets and rapidly changing magnetic axes.
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The first signs of use of iron come from the Sumerians and the Egyptians, where around 4000 BC, a few items, such as the tips of spears, daggers and ornaments, were being fashioned from iron recovered from meteorites. \n\nBy 3500 BC to 2000 BC, increasing numbers of smelted iron objects (distinguishable from meteoric iron by the lack of nickel in the product) appear in Mesopotamia, Anatolia, and Egypt.
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Haemoglobin, which is made red by the presence of iron. Just think of your blood as rusty.
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Iron (Fe). The main iron ores are magnetite (Fe3O4), hematite (Fe2O3), limonite FeO(OH)·nH2O, Siderite FeCO3
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It's widely believed in the scientific community that the earth has a liquid mantle (that's where magma/lava comes from) and a solid super-hot iron core.  Good luck digging through that.
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I found a very informative essay at the below address, which covers the removal of Alumina from Its Bauxite Ore.  The process is very complex because Alumina is not actually found in its raw state as part of the Bauxite compound.  Bauxite is heated and then through a process of chemical electrolysis alumina is extracted and forms aluminium.  More precise explanation can be found at below address.     \n\nhttp://www.patana.ac.th/parents/curriculum/Chemistry/units/LR803.html
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iron, why don't you design your own obstacle and get some place to make it for you at a low price
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OK, here goes---no chemical formulas--look that up in your chemistry book.\n\nLead is mined.  The ore comes out of the mine as a Lead Oxide.  Chunks of ore range from about the size of a loaf of bread on down.  Ore goes through jaw crushers to reduce in size.  Golfball size ore goes through a rod mill. (Large revolving drum full of steel rods)  Comes out pea sized.  Ore goes into a ball mill. (Large revolving drum full of steel balls)  Comes out the size and consistency of talcum powder)   The ore/water mixture is called a slurry.  The slurry comes out of the ball mill and goes into flotation chambers where a mixture of water and foaming agents are being agitated.  The lead particles in the slurry attach themselves to the bubbles created by the foaming agent.  They rise to the top of the tank where the foam is scraped off by paddles.  Waste rock called tailings is pumped in a slurry form to a disposal site.  The lead bubble foam is transported to a dryer.  The dryer removes excess water and leaves the final product of the mine and mill--lead concentrate.  (lead oxide)\n\nThe concentrate is hauled to the smelter.  If it was put into the furnace in its current state it would go right up the chimney---the lead is the consistency of talcum powder.  In order to melt the lead, we have to hold it in place long enough to melt so that it doesn't all just blow out the chimney.  This is done by a process called sintering.  Lead concentrate is added to crushed limestone, coke and other chemical reagents.  It is then run through the sintering machine.  The sintering machine roasts the mixture for 20 minutes and when the sinter comes out the end of the machine it resembles the klinkers that you'll see come out of an old coal fired furnace.  The roasting process causes all the ingredients to mold together into a solid chunk---called sinter.  The sinter comes out of the machine in huge chunks---as big as a car---and is run through a crusher to break it up into manageable size--about the size of a basketball on down.  The sinter goes into a storage bin.\n\nNow, its time for the furnace.  The sinter is mixed with more powdered limestone, iron ore, coke, coke breeze, lead scraps from spills.  This mixture is fed into a top feed furnace.  As the mixture falls down into the bottom of the furnace it encounters the fire.  Pure oxygen is pumped into the furnace, feeding the fire.  The coke and coke breeze burn creating enormous amounts of heat.  The sinter holds the lead in place long enough for it to melt and flow into the bottom of the furnace.  The sinter is then consumed by the fire as its remaining ingredients are partially cooked coke.  When the bottom of the furnace fills up with molten lead, it is tapped by the furnaceman.  The furnaceman will drain off a huge kettle full of molten lead.  Once the kettle is full the furnaceman will shut off the flow.  An overhead crane picks up the kettle and takes it over to the refinery area.\n\nA lot of sulfur containing compounds are generated as by-products of the smelting process.  At one plant I worked at they had an acid plant on site.  By scrubbing the furnace's exhaust gasses, they removed most of the SO2 from the exhaust.  The SO2 was then sent to the acid plant where a chemical reaction took place and the SO2 was changed to sulfuric acid---H2SO4.  The acid plant would produce a rail car full of 98% pure sufuric acid every day.\n\nThe scrubbed exhaust gasses went into another scrubbing device called the 'baghouse'.  This was a huge four story building about the size of a city block.  Every floor had dozens of rooms on it.  Each room was filled with bags that stretched from the ceiling of the room to the floor.  This bags were made of cloth---they were filter bags.  The exhaust gasses passed through these bags and the most minute particles were filtered out. The remaining exhaust gasses went up the chimney.\n\nWhoa--that brought back memories!  Believe me, you haven't lived t
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It truly depends on the amount of Iron in the magnet as to the strength and the base material that it is made of.  Some of those cheap rubbery refrigerator magnets will deteriorate or dry rot over a period of years and thus lose it's quality.  \n\nHow ever a good solid high iron ore magnet will easily out live you.  (with proper care)
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Make joint mechanically secure prior to soldering\n\nBe sure iron is fully heated prior to soldering\n\nUse noncorrosive soldering paste.\n\nKeep heating until solder at joint flows, and is shiny\nKeep work still until it has cooled\n\nDon't use too much solder\n\nWhen putting down torch or iron, don't put it where it will harm anything or anyone\n\nMinimize breathing of fumes\n\nDon't overheat electronic parts or wire insulation\n\nPractice soldering before needing to know how
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http://en.wikipedia.org/wiki/Extreme_ironing
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The conversion of light elements into heavy elements, hydrogen into helium and on right up to iron, by atomic fusion. This is how a star shines. When the iron stage is reached the Sun has run out of fuel and the equilibrium between thermal forces and gravity is lost and gravity wins, resulting in the collapse into a white dwarf after going Nova and spreading its heavy elements into space. That's right we are all made of star stuff! JULES