
541Ferrous Metals
Chemical reactions (incl. lancing)
Total
–89.0 kWh/ton
–24.4 kWh/ton
–13.9 kWh/ton
–26.2 kWh/ton
–153.6 kWh/ton
Fe + 1/2 O
2
(g)=FeO
Si +O
2
(g)=SiO
2
C+1/2 O
2
(g)=CO
Mn+ 1/2 O
2
(g)=MnO
Heat losses –
Electrical +
water cooling
174.9 kWh/ton
Slag
67.6 kWh/ton
Assumptions
Mass balance
Units
Cancel
Ok
Dry off gas
analysis:
H
2
O
2
78.4
33.72%
14.96%
16.83%
1.34%
kWh/ton
CO
2
CO
Electrical energy
Air ingress
O
2
= 0.8 kWh/tonN
2
=18.6 kWh/ton
19.3 kWh/ton
–472.2 kWh/ton
kWh/ton
Air/O
2
post-combustion
–43.4 kWh/ton
Burners
0.0 kWh/ton
–26.1
bon
Slag formation –3.1 kWh/ton
Steel
390.5
kWh/ton
Electrode oxidization
–7.7 kWh/ton
Foamy slag carbon
0.0 kWh/ton
FIGURE 22.8
Energy balance for t ...