blast furnace by bhawesh barve
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GYAN GANGA COLLEGE OF TECHNOLOGY JABALPUR
IRON MANUFACTURINGBY
BHAWESH BARVEM.E- 4th SEM
0208ME141017
What is iron?Iron is very reactive and is found in nature in form of
its oxides ,carbonates and sulphates.Symbole-Fe
atomic no.-26atomic mass-55.84
melting point –1538CBoiling point -2750C
state-solidcolour-silver gray
1) iron is not found free in nature.2)But is found in iron ores such as heamatite(fe2o3),megnatite(fe3o4).*The main iron ore is heamatite.
Types of Iron1) Pig Iron 2)Cast Iron3)Wrought Iron
Allotropes Of Iron1) Alpha Iron2) Beta Iron3)Gamma Iron
Source
Manufacturing Of Pig IronBy
Blast Furnance
Charge Use in Blast Furnance
1) Iron Ore- Hematite (Fe2O3)Magnatite(Fe3O4)
2) Coke- Heating Agent /Reducing Agent 3) Lime Stone- As a Flux.
Reactions At Blast Furnance
1) Zone Of Fusion-It is the lower most zone.Temp.- 1300-1500C
C + O2------ CO2 + 400Kj
2)Zone of Absorption-Middle Zone.Temp.- 800-1000C
CO2 +C -------- 2CO +160 KjCaCo3------ Cao + CO2
Cao +Sio2-----CaSio3 (slag)3) Zone Of Reduction – Upper most Zone .
Temp- 400-700CFe2O3 + 3CO----2Fe + 3CO2
Impurities Found In Iron Ore And There Effects
1) P-% vary from 0.1 to 2%It combined with Iron &form Fe3P it embrittles iron.
2) S -%vary from 0.4 to 1%It also makes Iron br ittle ,hard &produce unsound casting.
3) Mn-%vary from 0.5 to 1%it increases hardness.
4) Si - %vary from 1 to 4%it reduces the strength of iron and make it brittle.
5) C- 4to 4.5%1)
The hoba meteroite
In Namibia is the largest naturally occuring piece of iron in the world.Weight -60tonsIron-82 – 83%Ni – 16- 17%
Co – 1%
ANY QUERY
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