Mass Balance

Mass Balance

Mass Balance
• Raw Material Balance (Burden Calculation)
– Fe Balance – Coke rate – Slag rate – Slag Basicity

• • • •

Nitrogen Balance Hydrogen Balance Carbon Balance Oxygen Balance

Raw Material Balance

• Burden calculation

• Material balance

Nitrogen Balance
N2 Input Change in B.F. N2 Output

N2 in Blast Air

No Reaction

N2 in Top Gas

Carbon Balance
C input
C in Limestone C in PC

Change in B.F
Decomposition of limestone

C Output
CO

Combustion in front of Tuyere

by O2 Top Gas by H2O

Gasified Carbon

C in Coke

Direct Reduction by FeO (Solution loss Carbon) Direct Reduction by Si, Mn, P C in Pig Iron Dissolution in Pig Iron

CO2

C in Sinter

C in Dust

Hydrogen Balance
H2 Input H2 in PC
Decomposition in front of Tuyere

Change in B.F. H2 => H2

H2 Output H2 Top Gas

H2 O in Blast Air H2 O in Coke

H2 Reduction H2O => H2

H 2O

Oxygen Balance
O2 Input
CO2 in Limestone

Change in B.F.
Decomposition of Limestone

O2 Output
CO

O2 in Blast Air Air O2 Enrichment Humidity
Combined O2 in Iron Ore

Combustion in front of Tuyere

Top Gas

CO2
Gasification by Reduction H2O Gasification by Reduction of Si, Mn. P Slag Formation Combined O2 in Coke

O2 in Slag

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