32
H. Li et al.
Fig. 2 Flow chart of carbon metabolism of BF process
Carbon Metabolism of Blast Furnace Ironmaking Process
The flow chart of the carbon metabolism of blast furnace ironmaking is shown in
Fig. 2. Most BFG generated are collected into the gas tank and some of it is wasted,
which is called gas bleeding and this part of carbon emissions should be technical
emission. However, the situation of the BFG stored in the gas tank is complicated.
Only the CO 2 in BFG of the gas tank is regarded as technical emission. The CO in
the BFG used as fuel for hot stoves will convert into CO 2 after combustion and this
should be combustion emission.
Converter Steelmaking Process
The flow chart of the carbon metabolism of converter steelmaking is shown in Fig. 3.
For the converter steelmaking process, since only the furnace gas in blowing period
is recovered into the gas tank as LDG, a quite amount of gas from the converter is
wasted. Similar to the ironmaking process, for the converter steelmaking, the carbon
in the bled gas is regarded as technical emission of CO 2 . The CO 2 carried by the
LDG is also treated as technical emission. The steelmaking process can also cause
combustion emission as a result of burning fuels like LDG.
Electric Arc Furnace Steelmaking Process
As for the input end, carbon enters EAF steelmaking system mainly in the form of
hot metal and scrap, etc. Meanwhile carbon can be brought in by blowing auxiliary
H. Li et al.
Fig. 2 Flow chart of carbon metabolism of BF process
Carbon Metabolism of Blast Furnace Ironmaking Process
The flow chart of the carbon metabolism of blast furnace ironmaking is shown in
Fig. 2. Most BFG generated are collected into the gas tank and some of it is wasted,
which is called gas bleeding and this part of carbon emissions should be technical
emission. However, the situation of the BFG stored in the gas tank is complicated.
Only the CO 2 in BFG of the gas tank is regarded as technical emission. The CO in
the BFG used as fuel for hot stoves will convert into CO 2 after combustion and this
should be combustion emission.
Converter Steelmaking Process
The flow chart of the carbon metabolism of converter steelmaking is shown in Fig. 3.
For the converter steelmaking process, since only the furnace gas in blowing period
is recovered into the gas tank as LDG, a quite amount of gas from the converter is
wasted. Similar to the ironmaking process, for the converter steelmaking, the carbon
in the bled gas is regarded as technical emission of CO 2 . The CO 2 carried by the
LDG is also treated as technical emission. The steelmaking process can also cause
combustion emission as a result of burning fuels like LDG.
Electric Arc Furnace Steelmaking Process
As for the input end, carbon enters EAF steelmaking system mainly in the form of
hot metal and scrap, etc. Meanwhile carbon can be brought in by blowing auxiliary