Solution:

The reader should attempt to make materials balance. Here materials balance results are given

a)   

b)                                                         

c)       

d)                            

d)

e) Heat of decomposition of  from the  (highly endothermic). The reader should note that decomposition of  absorbs large amount of heat.

f) Heat content of pig iron and slag at 1700K From the thermo chemical data, heat content in . This heat content of slag can be calculated from the thermo chemical data and materials balance.

g) Sensible heat in gases From the data:

h) Heat of combustion. At the tuyere all the carbon is burnt into
 Exothermic

i) Heat evolved or absorbed in reduction reactions.
 reduction to  absorbs heat.
.
Reduction of  to  

 
Reduction of  to .
 
 

j) Heat absorbed by Boudward reaction Boudward reaction

is one of the most important reactions in metal extraction in general and blast furnace in iron making particular.  

 

Boudward reaction is highly endothermic.

.

Number of  produced by reduction of  and  by
 

From the material balance one can obtain  produced by reduction of


.

Moles of  reduced by .

.