blast furnace, iron manufacturing process

1. GYAN GANGA COLLEGE OF
TECHNOLOGY JABALPUR
IRON MANUFACTURING
BY
BHAWESH BARVE
M.E- 4th SEM
0208ME141017

2. What is iron?
Iron is very reactive and is found in
nature in form of its oxides ,carbonates
and sulphates.
Symbole-Fe
atomic no.-26
atomic mass-55.84
melting point –1538C
Boiling point -2750C
state-solid
colour-silver gray

4. 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 Iron
1) Pig Iron
2)Cast Iron
3)Wrought Iron
Allotropes Of Iron
1) Alpha Iron
2) Beta Iron
3)Gamma Iron
Source

6. Manufacturing Of Pig Iron
By
Blast Furnance

7. Charge Use in Blast Furnance
1) Iron Ore- Hematite (Fe2O3)
Magnatite(Fe3O4)
2) Coke- Heating Agent /Reducing Agent
3) Lime Stone- As a Flux.

9. 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 Kj
CaCo3------ Cao + CO2
Cao +Sio2-----CaSio3 (slag)
3) Zone Of Reduction – Upper most Zone .
Temp- 400-700C
Fe2O3 + 3CO----2Fe + 3CO2

10. 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 brittle ,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)

11. The hoba meteroite
In Namibia is the largest naturally occuring
piece of iron in the world.
Weight -60tons
Iron-82 – 83%
Ni – 16- 17%
Co – 1%