Material Flow Analysis of CO2 Emissions from Blast Furnace and Basic Oxygen Furnace Steelmaking Systems in China. Issue 9 (30th January 2015)

• Record Type: Journal Article
• Authors: Xu, Wenqing; Cao, Wanjie; Zhu, Tingyu; Li, Yinjiao; Wan, Bin
• Is Part Of: Steel research international. Volume 86:Issue 9(2015:Sep.)
• Page Start: 1063
• Page End: 1072
• Publication Date: 2015-01-30
• Subjects: Steel -- Periodicals; Steel -- Metallurgy -- Periodicals; 669.142
• DOI: 10.1002/srin.201400228
• Languages: English
• ISSNs: 1611-3683

Abstract

<abstract abstract-type="main" xml:lang="en"> <title> <x xml:space="preserve">Abstract</x> </title> <sec id="srin201400228-sec-0001" sec-type="section"> <p>In China, iron and steel plants are confronted with increased demands to reduce their CO<sub>2</sub> emissions. Data on CO<sub>2</sub> emissions derived from iron and steel making is a basic requirement for a certificate of CO<sub>2</sub> 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<sub>2</sub> emissions in three steel works. The amount of carbon flow and CO<sub>2</sub> emission per ton of product (<inline-formula><alternatives><inline-graphic mimetype="image" xlink:href="ark:/27927/pgj2gt0htc8" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink" /><mml:math altimg="urn:x-wiley:14381656:media:srin201400228:srin201400228-math-0026" display="inline" overflow="scroll" xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">E</mml:mi><mml:mi mathvariant="normal">F</mml:mi></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">C</mml:mi><mml:mi mathvariant="normal">O</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:msub></mml:mrow></mml:math></alternatives></inline-formula>) of each process in BF‐BOF steeling systems is obtained. The results show that the <inline-formula><alternatives><inline-graphic mimetype="image" xlink:href="ark:/27927/pgj2gt0htj1" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink" /><mml:math altimg="urn:x-wiley:14381656:media:srin201400228:srin201400228-math-0027" display="inline" overflow="scroll" xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">E</mml:mi><mml:mi mathvariant="normal">F</mml:mi></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">C</mml:mi><mml:mi mathvariant="normal">O</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:msub></mml:mrow></mml:math></alternatives></inline-formula> of each process varies significantly. As for the highest percentage of parts, the <inline-formula><alternatives><inline-graphic mimetype="image" xlink:href="ark:/27927/pgj2gt0hthg" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink" /><mml:math altimg="urn:x-wiley:14381656:media:srin201400228:srin201400228-math-0028" display="inline" overflow="scroll" xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">E</mml:mi><mml:mi mathvariant="normal">F</mml:mi></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">C</mml:mi><mml:mi mathvariant="normal">O</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:msub></mml:mrow></mml:math></alternatives></inline-formula> of the blast furnace iron making is greater than 700 kg on average; however, the <inline-formula><alternatives><inline-graphic mimetype="image" xlink:href="ark:/27927/pgj2gt0htm4" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink" /><mml:math altimg="urn:x-wiley:14381656:media:srin201400228:srin201400228-math-0029" display="inline" overflow="scroll" xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">E</mml:mi><mml:mi mathvariant="normal">F</mml:mi></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">C</mml:mi><mml:mi mathvariant="normal">O</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:msub></mml:mrow></mml:math></alternatives></inline-formula> of casting is only roughly 50 kg. The <inline-formula><alternatives><inline-graphic mimetype="image" xlink:href="ark:/27927/pgj2gt0hwm5" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink" /><mml:math altimg="urn:x-wiley:14381656:media:srin201400228:srin201400228-math-0030" display="inline" overflow="scroll" xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">E</mml:mi><mml:mi mathvariant="normal">F</mml:mi></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">C</mml:mi><mml:mi mathvariant="normal">O</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:msub></mml:mrow></mml:math></alternatives></inline-formula> of 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<sub>2</sub> is removed from blast furnace gas along with carbon capture and storage, and traditional energy saving approaches/technologies for CO<sub>2</sub> reduction for the iron and steel industry are introduced.</p> </sec> </abstract>