Ranking of Injection Biochar for Slag Foaming Applications in Steelmaking

The electric arc furnace (EAF) has the potential to significantly contribute to the decarbonization of the iron and steel industry. However, during EAF steelmaking, carbon still needs to be injected into the molten slag to initiate slag foaming, which is beneficial to the energy efficiency and prote...

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Published inMetals (Basel ) Vol. 13; no. 6; p. 1003
Main Authors DiGiovanni, Christopher, Li, Delin, Ng, Ka Wing, Huang, Xianai
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.06.2023
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Abstract The electric arc furnace (EAF) has the potential to significantly contribute to the decarbonization of the iron and steel industry. However, during EAF steelmaking, carbon still needs to be injected into the molten slag to initiate slag foaming, which is beneficial to the energy efficiency and protection of the furnace. To move away from fossil carbon, biocarbon has gained attention as an injection carbon agent. In this study, two biochar candidates were added to the molten slag layer of an induction furnace for steel melting, to simulate EAF steelmaking conditions. The resultant slag foaming height was measured, and a ranking in comparison to two fossil carbon candidates was developed. The results indicate that the injection biochar sample, in the form of a bio-briquette, has a considerable degree of slag foaming capacity. More work is ongoing to develop a standardized testing methodology of ranking various injection biochar candidates for their suitability and qualification for use on a larger scale.
AbstractList The electric arc furnace (EAF) has the potential to significantly contribute to the decarbonization of the iron and steel industry. However, during EAF steelmaking, carbon still needs to be injected into the molten slag to initiate slag foaming, which is beneficial to the energy efficiency and protection of the furnace. To move away from fossil carbon, biocarbon has gained attention as an injection carbon agent. In this study, two biochar candidates were added to the molten slag layer of an induction furnace for steel melting, to simulate EAF steelmaking conditions. The resultant slag foaming height was measured, and a ranking in comparison to two fossil carbon candidates was developed. The results indicate that the injection biochar sample, in the form of a bio-briquette, has a considerable degree of slag foaming capacity. More work is ongoing to develop a standardized testing methodology of ranking various injection biochar candidates for their suitability and qualification for use on a larger scale.
Audience Academic
Author Li, Delin
Ng, Ka Wing
Huang, Xianai
DiGiovanni, Christopher
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  givenname: Xianai
  surname: Huang
  fullname: Huang, Xianai
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SubjectTerms biochar
Biomass
biomass utilization
Briquets
Carbon
electric arc furnace
Electric arc furnaces
Electric induction furnaces
Emissions
Foaming
Fossil fuels
induction melting furnace
injection carbon
Iron and steel industry
Laboratories
Ranking
Scrap
Slag
slag foaming
Steel industry
Steel making
Sulfur content
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Title Ranking of Injection Biochar for Slag Foaming Applications in Steelmaking
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