How tall is a blast furnace?
A blast furnace used in steelmaking is about 130 ft or 40 metres.
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The basic concept of a blast furnace hasn't changed in more than 100 yrs. Modern furnaces are of course more complex due to newer technologies. First of all the furnace is basically a steel tank, inside it is lined with brick or gunite. The outside shell is protected from the heat by hundreds of "co…olers" which are located around the entire furnace. Coolers are usually made from copper and have water inlets and outlets; water does not enter the inside of the furnace but is circulated in a closed loop system through a network of piping. At the bottom of the furnace are openings called tuyeres (ta-weers) through which hot air is blown into the furnace. The tuyeres are connected to a large brick-lined pipe called a bustle pipe. The bustle pipe is connected to a series of very large stoves. Outside air is fed into the stoves where it is heated. The heated air is then blown into the bustle pipe, through the tuyeres and into the furnace. The tuyeres can also be piped to allow the use of oxygen, pulverized coal, and natural gas to enhance the heat. Raw material is loaded into the top of the furnace by conveyor or a skip car which runs on a track pulled by cables. The raw materials are iron ore, limestone, coke and alloys chosen by the steelmaker. At the bottom of the furnace is an opening called the tap hole. The tap hole is plugged by a machine called a mud gun, the mud gun is loaded by hand with "mud" which is a high grade refractory that does not melt under the intense heat. After the materials reach the desired temp (usually about 3500 deg F) another machine called a tap drill drills out the mud to let the molten metal out of the furnace; this is known as "casting". Molten metal and slag are separated by a series of channels, slag (girl) will flow to a pit or slag car to be carried away. The slag is cooled to be used in a variety products such as an additive in concrete. The metal is channeled to bottle cars to be transported to different areas of the mill for processing. This is a very basic overview of a blast furnace, they are highly complex and very dangerous! (MORE)
iron is collected from blast furnace by drilling the taphole.Taphole is a hole drill and plug after cycle of time located in blast furnace bottom.
Lime is added to iron ore to help melt some of the unwanted, valuless parts parts of the ore
It is the quantity of carbon consumed by oxygen in unit time.for example coke consumed at tuyer level by hot blast which carry oxygen and this oxygen consume carbon in coke which consume in raceway per unit time.
the Coke supplies carbon monoxide to reduce the ore in a blast furnace and supplies heat to melt the iron.
Iron is removed from a balst furnace, it melts as it seeps down to the higher temperatures at the bottom of the furnace from where it is tapped off. Hope that helps.
Coke which supplies carbon monoxide to reduce the ore in a blast furnace and supplies heat to melt the iron.
\n \n\n. \n. Coal, distilled to drive off its contents and leave the carbon, plus a little bit of non-volatile impurities, principally silica; in a form called Coke. (No relation to the colloquial contraction of Coca-Cola! :-) )
Haematite, coke (which is mainly carbon; not the coke that we drink) & limestone (calcium carbonate)
Extracting iron from iron ore using a Blast Furnace Introduction The common ores of iron are both iron oxides, and these can be reduced to iron by heating them with carbon in the form of coke. Coke is produced by heating coal in the absence of air. Coke is cheap and provides both the reducing age…nt for the reaction and also the heat source - as you will see below. Iron ores The most commonly used iron ores are haematite (US: hematite), Fe 2 O 3 , and magnetite , Fe 3 O 4 . The Blast Furnace The heat source The air blown into the bottom of the furnace is heated using the hot waste gases from the top. Heat energy is valuable, and it is important not to waste any. The coke (essentially impure carbon) burns in the blast of hot air to form carbon dioxide - a strongly exothermic reaction. This reaction is the main source of heat in the furnace. The reduction of the ore At the high temperature at the bottom of the furnace, carbon dioxide reacts with carbon to produce carbon monoxide. It is the carbon monoxide which is the main reducing agent in the furnace. In the hotter parts of the furnace, the carbon itself also acts as a reducing agent. Notice that at these temperatures, the other product of the reaction is carbon monoxide, not carbon dioxide. The temperature of the furnace is hot enough to melt the iron which trickles down to the bottom where it can be tapped off. The function of the limestone Iron ore isn't pure iron oxide - it also contains an assortment of rocky material. This wouldn't melt at the temperature of the furnace, and would eventually clog it up. The limestone is added to convert this into slag which melts and runs to the bottom. The heat of the furnace decomposes the limestone to give calcium oxide. This is an endothermic reaction, absorbing heat from the furnace. It is therefore important not to add too much limestone because it would otherwise cool the furnace. Calcium oxide is a basic oxide and reacts with acidic oxides such as silicon dioxide present in the rock. Calcium oxide reacts with silicon dioxide to give calcium silicate. The calcium silicate melts and runs down through the furnace to form a layer on top of the molten iron. It can be tapped off from time to time as slag. Slag is used in road making and as "slag cement" (MORE)
The waste gases are carbon dioxide and nitrogen . They come out at the top of the furnace. The carbon dioxide is from the reduction reaction. The nitrogen is from the air blast. It has taken part in the reactions so has not been changed.
Some will give credit to Sir Henry Bessemer invented the modern dayblast furnace in 1855. However, if you look historically theChinese invented the blast furnace. By at least the 4th century theChinese have developed blast furnaces to obtain cast iron from ironore. This was 1200 years before the fir…st blast furnace showed upin Europe. (MORE)
It is because hot air is literally blasted in through the bottom of the furnace.
there is no carbon in the metal anymore. this is what the blast furnace job is, too purify the metal :)
Several things come out of blast furnaces. They are listed here:. 1) A molten version of whatever material was put in it to begin with,. 2) Incredible heat,. 3) Powerfull light,. 4) A waste gas and usually some slag remnant of the fuel that powers the furnace.
Hot air is blasted into the blast furnace to burn the coke (a cheap form of carbon) added to form carbon dioxide.
The coke we put in blast furnaces to produce iron is almost all carbon . Some ash will be present, and a bit of sulfur, tar and some other residues of the coking process. But carbon is what we're looking for to react with the iron oxide and reduce it to iron in the blast furnace. Use the link below… to check facts and learn more. (MORE)
\nUseful Volume of Blast Furnace is the volume of the furnace from the throat level to the level where the taphole is placed. This is known the way basically because that is the region where the useful products from Blast furnace are present.
it is tappered to accomodate the gradual volume expansion of the solid charge as it descends through zones of Stack,from top to bottom in the stack the temperature gradually increases and we need to ascertain smooth burden descent.
I would imagine so that it provides a wider base of support for stability and also to create vaccuum to generate more heat. An opening too large will end up with turbulence rather than vaccuum. Any replies to email@example.com
Hot air contains oxygen, which reacts with Coke (a form of carbon) in order to form carbon dioxide, which in turn forms carbon monoxide which is used as a reducing agent.
In essence nothing, a Cupola furnace is a type of blast furnace in that it is charged at the top and tapped at the bottom and air is blasted into the furnace via a wind belt and tuyres. A blast furnace in a steel works is a huge structure operated for long periods of time, it is charged with iron or…e, coke and limestone and reduces the iron ore into pure iron. A Cupola furnace, as used in the foundry re melts pig iron, from the blast furnace, along with foundry scrap, steel scrap and scrap iron engine blocks and produced iron alloys of various specifications. A Cupola furnace is usually operated on a daily basis but some types can be continuously operated for several weeks (MORE)
As of mid-2012 the largest blastfurnace in Europe was the one at Duisberg, Germany, which is saidto be about 90 metres tall. Please see the link..
The air (hot blast and possibly added oxygen) ranges from 1800 to 2200F (depending on equipment and operating conditions. The flame temperature (RAFT) is between 3400 and 4200F. The liquid pig iron is generally about 2700F.
Slag is the waste which is skimmed off the top of the molten iron that comes out of the blast furnace. It is a mixture of calcium and magnesium compounds, plus other impurities such as iron oxide, but is mainly calcium silicate. The formula for calcium silicate is CaSiO 3 .
the hottest part of a blast furnace are the blue flames which has fully reacted with O2. the yellowish part contains carbon as it's not totally reacted.
the metals extracted by a reduction blast furnace is : iron and steel these two are the right answers
it is as like as viscous liquid so the angle of repose for it under 30 deg
In a furnace large amount of the heat supplied is wasted in the form of exhaust or flue gases.. that s called as heat loss in a furnace..
The limestone decomposes to quicklime and carbon dioxide, and the quicklime removes acidic impurities (eg SiO2). So basically limestone is to remove impurities
I think the temperature of taphole in closed conditon is around 75 degree C to 125 degree C.In opened condition while the casting is on it is 1400degreeC to1480 degreeC.
Coal, distilled in a retort to expel the volatile content and leave the carbon as a spongy-looking solid called "coke". \n. (Strange - there are several versions of this question, suggesting to me poor teaching or text-books that focus only on the chemistry and not the overall process, purpose and …materials.) \n \n (MORE)
Sintering has two reasons: 1- You want to put in the blast furnace an homogeneous mix of fluxand mineral. 2- You want something with a lot of pores. So the reductor gas canmake contact with a lot of surface.
Septum Valves are installed after the dust collector venturi scrubber , to decrease the pressure of Top gas from the blast furnace to supply it to other processes at low pressure.
The oldest extant blast furnaces were built during the Han Dynasty of China in the 1st century BC, that's pretty interesting if you ask me. And of course the fact you get a 'SLAG' at the end.
Blast furnaces require you to go and stick dil*o up your vag, then lick my long john and give a fellatio to your cousin.
According to steel.nic.in; Coke Rate is measured in Kgs of BF Coke consumed per tonne of Hot Metal produced in the Blast Furnace(Kg/THM). By convention, this excludes coke (nut/pearl coke) mixed with sinter etc. Introduction of high quality coke to a blast furnace will result in lower coke rate, h…igher productivity and lower hot metal cost. This principal is followed by many private chemical firms like Coke Oven Consultants and so on. (MORE)
Hot air is blasted into the furnace causing coke (carbon) to burn rapidly and raise the temperature to 2000 Â°C. carbon + oxygen carbon dioxide + heat. C(s) + O2(g) CO2(g) The carbon dioxide then reacts with hot carbon to form carbon monoxide. carbon dioxide + carbon carbon monoxide…. CO2(g) + C(s) 2CO(g) Carbon monoxide then reduces iron in the ore to iron metal. carbon monoxide + iron(III) oxide carbon dioxide + iron. 3CO(g) + Fe2O3(s) 3CO2(g) + 2Fe(l) The temperature where the reduction takes place is above 1500 Â°C. Iron falls to the bottom of the furnace where the temperature is 2000 Â°C. Iron is liquid at this temperature and is tapped off periodically (MORE)
It removes the heavy dust particles coming along with the BF(Blast Furnace) gas by reducing the velocity of the gas so that the dust particles are left as the gas lost it's ability to carry the dust particles
Because it has not been treated to harden it up there is a process called hardening that involves carbon that strengthens it up.
A blast furnace runs continuously, and input materials arecontinually dumped in at the top to make their way down through thefurnace. Shutting down a blast furnace for relining or other workis a major event in its life.
because round (mushroom furnaces) have limit in diameter offurnace, rectangular (Rachette furnace) can solve those problems
The iron that comes out the blast furnace is called cast iron . It is about 96% iron and 4% carbon, and this carbon impurity makes it too brittle to use in constructure. Pure iron, however, is too soft, all pure metals are. That's why we make steel. Three of the most common steels are: Medium steel… - 0.25% carbon High carbon steel - 0.75% carbon Stainless steel - a mixture of iron, chromium and nickel. Hope this helps :-) (MORE)
because co2 is highly flamable. it is a mixture of carbon and oxygen. its combanation is carbon one and oxygen two. (yes im a little nerdy at this stuff. lolz.)
Iron Ore contains the iron in a blast furnace plus any scrap metal that is added.
\n. \n. You don't. Carbon burns! \n. The fuel is carbon (as coke). \n. The refractory lining (fire-bricks) is made from minerals with very high melting-points.
First we add the basic iron production elements (i.e, limiston,coreand processed iron e.g hematite,Fe 2 O 3 ) the coke is react with oxygen and form crbone monoxide the limestone decomposed to CaO and carbon dioxide,CO 2 carbondioxide,CO 2 react with Fe 2 O 3 to form Fe and CO CaO (reaction flu…x) react with almunia and silica form slag the Fe is removed as a molton ways below blast furnace and sage is removed anather ways,THANK YOU FOR READ (MORE)
Blast furnace iron is pure iron. It isn't mixed with any other elements. In steel, iron is mixed with small amounts of carbon.
The blast furnace is a huge, steel stack lined with refractory brick, where iron ore , coke and limestone are dumped into the top, andpreheated air is blown into the bottom. The raw materials require 6to 8 hours to descend to the bottom of the furnace where theybecome the final product of liquid …slag and liquid iron . (MORE)
A blast furnace is used to separate iron from iron ore. A cupolafurnace is used to melt iron in a foundry for casting in molds