Write down the reactions taking place in different zones in the blast furnace during the extraction of iron.

Explanation

in the blast furance reducation of iron oxides take place at different temperature reanges as shown below.
at 500-800 k
`3Fe_(2)O_(3)+Coto 2Fe_93)O_(4)+CO_(2)`
`Fe_(3)O_(4) +4 CO to 3 Fe+4 CO_(2)`
`Fe_(2) O_(3) +Co to 2FeO+CO_(2)`
At 900-1500 K
`C+CO_(2) to 2CO`
`FeO+CO to Fe+CO_(2)`
`C+O_(2) to CO_(2)`
Above 1570 K
FeO+ to Fe+Co
`CaCO overset(Delta)to Cao +CO_(2)`
`CaO _SIO_(2) to caAIO_(3) (slag) `
the following reactions occur in the blast furnace :
(a) In zone of combustion ,
`C+O_(2)to CO_(2)ltDeltaH=- 393.3 kj `
(b) In zone of heat absorpition ,
`CO_(2)+Cto 2CO,Delta H =+ 163 .2 kj`
(c ) in zone of slag formation ,
`CaCO_(3) to CaO+CO_(2) `
`CaO+Sio_(2) tounderset(("slag"))underset( "Calcium silicate") CaSiO_(3) `
(d) in zone of reducation ,
`Fe_(2)O_(3) +CO overset(823 K)to 2FeO+CO_(2)`
`Fe_(3)O_(4) overset(823 K) 3FeO+cO_(2)`
`Fe_(2)O_(3) overset( gt1123 K) to Fe+3Co`