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Material Flow Analysis of CO 2 Emissions from Blast Furnace and Basic Oxygen Furnace Steelmaking Systems in China
Author(s) -
Xu Wenqing,
Cao Wanjie,
Zhu Tingyu,
Li Yinjiao,
Wan Bin
Publication year - 2015
Publication title -
steel research international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.603
H-Index - 49
eISSN - 1869-344X
pISSN - 1611-3683
DOI - 10.1002/srin.201400228
Subject(s) - blast furnace , steelmaking , basic oxygen steelmaking , coke , metallurgy , blast furnace gas , direct reduced iron , carbon fibers , carbon capture and storage (timeline) , steel mill , continuous casting , pig iron , pulverized coal fired boiler , material flow analysis , waste management , raw material , scrap , environmental science , materials science , coal , engineering , chemistry , ecology , climate change , composite number , composite material , biology , organic chemistry
In China, iron and steel plants are confronted with increased demands to reduce their CO 2 emissions. Data on CO 2 emissions derived from iron and steel making is a basic requirement for a certificate of CO 2 reduction. In the current paper, carbon flows from blast furnace and basic oxygen furnace (BF‐BOF) steelmaking systems are analyzed using Material Flow Analysis (MFA). The computation method is built and used to calculate CO 2 emissions in three steel works. The amount of carbon flow and CO 2 emission per ton of product (E FC O 2) of each process in BF‐BOF steeling systems is obtained. The results show that theE FC O 2of each process varies significantly. As for the highest percentage of parts, theE FC O 2of the blast furnace iron making is greater than 700 kg on average; however, theE FC O 2of casting is only roughly 50 kg. TheE FC O 2of the same process is more influenced by the firm size, and the main production equipment scale plays a small role. In the end, the input of coal and coke is decreased by using charcoal instead, CO 2 is removed from blast furnace gas along with carbon capture and storage, and traditional energy saving approaches/technologies for CO 2 reduction for the iron and steel industry are introduced.