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Iron when extracted from iron ore such as haematite containing ironIII oxide Fe 2 O 3 in a blast furnace is called iron extraction blast furnace metallurgy In this reduction reaction oxygen is removed from the ironIII oxide to leave behind iron
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Analysis of slag flow in blast furnace during the extraction of iron 1mayurkumar s suthar 2 prof ijpatel 3pravin zinzala 1me student 2professor 3assistant professor 1 pg student in mechanical engineering department ljiet ahmadabad india abstract the project aim set measurement of flow characteristics of blast furnace
The procedure of removal of iron is the blast furnace the slag that is gained on the iron ore is then detached and cooled down gradually which results in the creation of nonreactive crystalline substantial fig 1 extraction of molten slag from blast furnace
May 27 2013 high alumina slag and blast furnace operation blast furnace bf process of ironmaking is a process where liquid iron hot metal and liquid slag are produced by the reduction of iron bearing materials sinter and or pellet and lump ore with coke and by fluxing of the gangue material of the feed materials
2a extraction of iron in a blast furnace sadly now shut down raw materials iron ore eg haematite ore ironiii oxide the source of iron fe 2 o 3 or magnetite ore fe 3 o 4 coke carbon c both fuel and reducing agent hot air for the oxygen in it to burn the coke o 2 limestone calcium carbonate to remove certain impurities like silica
Aug 07 2015 the deteriorating effect of high alumina in the slag is offset by increasing its mgo content the alumina concentration in the slag is semiempirically set in many countries at the upper limit of around 16 in order to avoid the accumulation of the iron slag and the deterioration of permeability in the lower part of the blast furnace
The slag formed in the blast furnace during the extraction of iron from haematite is
The method three substances are needed to enable to extraction of iron from its ore the combined mixture is called the charge iron ore haematite often contains sand with iron oxide fe 2 o 3 limestone calcium carbonate coke mainly carbon the charge is placed a giant chimney called a blast furnace the blast furnace is around 30 metres high and lined with fireproof bricks
In this zone fe 2 o 3 is reduced to iron by co in three steps 3fe 2 o 3 co 2fe 3 o 4 co 2 fe 3 o 4 co 3feo co 2 feo co fe co 2 solid state from the bottom of blast furnace molten slag and molten iron are tapped out
Alkali metals are removed with slag with the off gas and rest circulates in the furnace other than the blast furnace alkali have their negative effect on the other processes of an integrated
The slag is in molten state and separates out from iron the iron obtained from blast furnace contains about 4 carbon and some other impurities this iron is known as pig iron cast iron is different from pig iron and is made by melting pig iron with scrap iron and coke using hot air blast it has slightly lower carbon content about 3 and
The bosh is the hottest part of the furnace because of its close proximity to the reaction between air and coke molten iron accumulates in the hearth which has a taphole to draw off the molten iron and higher up a slag hole to remove the mixture of impurities and fluxthe hearth and bosh are thickwalled structures lined with carbontype refractory blocks while the stack is lined with
Plant for extraction of iron ore from slag ore extraction plant iron ore extracting processing plant iron processing use of a smelting process to turn the ore into a form from were used as a source of iron before 3000 bc but extraction of the metal from ores can supply a steelmaking plant with up to 10 000 tons of liquid iron
Blast furnace slag is a nonmetallic coproduct produced in the process in the production of iron from iron ore or iron scrap it consists primarily of silicates aluminosilicates and calciumaluminasilicates the molten slag which absorbs much of the sulfur from the charge comprises about 20 percent by mass of iron production
3 extracting iron contents 1 syllabus 2 what does this mean the main reactions involved in the extraction of iron from iron ore haematite using coke limestone and air in a blast furnace the slag also flows to the bottom of the furnace but is less dense than the iron and so floats on top
Sep 07 2017 the old metallurgical engineer and steelmaker says a mix of highvolatile medium volatile and lowvolatile coal volatile meaning the relative content of xylene toluene butadiene and other aromatic hydrocarbons is coked meaning heated withou
Oct 15 2019 blast furnace ironmaking advantages 1 continuous feeding continuous tapping suitable for largescale continuous production 2 low power requirements 3 the product is further processed continuous casting and rolling with good performance
George c wang in the utilization of slag in civil infrastructure construction 2016 abstract molten blast furnace bf slag and steel slag are produced simultaneously with iron and steel manufacturing bf slag results from smelting iron ore coke and fluxes during the operations of extracting iron from the iron
In the blast furnace extraction of iron the highest temperature is in a slag zone b reduction zone c combustion zone d fusion zone check an
Stages in the extraction of iron in a blast furnace are described below after iron ore coke and limestone have been added at the top but not in the correct order 1 carbon dioxide reacts with coke carbon to form carbon monoxide 2 limestone combines with acid impurities 3 hot air is blown into the furnace
Oct 27 2011 bos slag process when molten iron referred to as hot metal from the blast furnace is to be converted into steel the main tasks are the removal of carbon silicon and phosphorus the ld linzdonawitz process is by far the most widely used and takes its
Zimsec o level combined science notes extraction of iron the blast furnace after iron ore is mined it is send to the blast furnace iron is extracted from its ore in a blast furnace the structure of a blast furnace image credit scoolcouk
In this research ammonium chloride was used to calcine tiextraction blast furnace slag ebfs with the aim of removing iron from it the influences of calcination temperature ammonium chloride
Among the commodity metals iron and steel are by far the most widely used materials with annual production near 19 billion metric tons 3 the main byproduct of ironmaking is iron slag socalled blast furnace bf slag which is generated when iron ore is mixed with flux limestone andor dolomite and coke for fuel and heated under reducing
Oct 01 2018 the chemical composition of blast furnace slag bfs from the factory of helwan for iron making industries was analyzed and its chemical composition was found to be 35 44 76 8 08 and 2 wt of sio 2 cao al 2 o 3 mgo fe 2 o 3 and wt so 3 respectivelysulfonated mesoporous silica gel obtained from bfs was activated with concentrated sulfuric acid at high temperature to obtain
Slag is used in road making and as slag cement a final ground slag which can be used in cement often mixed with portland cement cast iron the molten iron from the bottom of the furnace can be used as cast iron cast iron is very runny when it is molten and doesnt shrink much when it solidifies