CO 2 Emission Calculation Model of Integrated Steel Works Based on Process Analysis
35
The calculation of an emission factor is based on the actual situation of iron and
steel enterprises; the other emission factors are available in “Guideline”.
Case Analysis of Carbon Emissions of Integrated Iron
and Steel Enterprises
Overall Analysis
In this paper, an integrated iron and steel enterprise including both BF-BOF and
EAF processes was taken as a case to calculate and analyze the carbon emissions.
The scale of production is of 10 million tons of steel annually. The enterprise covers
the processes such as coking, pelletizing, sintering, BF ironmaking, converter steelmaking, EAF steelmaking, rolling, boiler power generation, and lime, etc. The analysis is based on the statistical data of energy consumption of the enterprise in 2018.
The total direct CO 2 emissions of this enterprise reached 1885.60 million tons. The
emission intensity ratios of each process are shown in Fig. 4.
Figure 4 shows that sintering, ironmaking, and boiler power generation are the
major processes causing CO 2 emissions. Among them, the emission ratio of ironmaking process is as much as 53.64%, which is the process that emits the most CO 2 .
Figure 5 shows the combustion emission and technical emission of each process, in
Fig. 4 Emission intensity ratio of each process
35
The calculation of an emission factor is based on the actual situation of iron and
steel enterprises; the other emission factors are available in “Guideline”.
Case Analysis of Carbon Emissions of Integrated Iron
and Steel Enterprises
Overall Analysis
In this paper, an integrated iron and steel enterprise including both BF-BOF and
EAF processes was taken as a case to calculate and analyze the carbon emissions.
The scale of production is of 10 million tons of steel annually. The enterprise covers
the processes such as coking, pelletizing, sintering, BF ironmaking, converter steelmaking, EAF steelmaking, rolling, boiler power generation, and lime, etc. The analysis is based on the statistical data of energy consumption of the enterprise in 2018.
The total direct CO 2 emissions of this enterprise reached 1885.60 million tons. The
emission intensity ratios of each process are shown in Fig. 4.
Figure 4 shows that sintering, ironmaking, and boiler power generation are the
major processes causing CO 2 emissions. Among them, the emission ratio of ironmaking process is as much as 53.64%, which is the process that emits the most CO 2 .
Figure 5 shows the combustion emission and technical emission of each process, in
Fig. 4 Emission intensity ratio of each process