Understanding of Blast Furnace Performance with Biomass Introduction

Joel Orre; Lena Sundqvist Ökvist; Axel Bodén; Bo Björkman

doi:10.3390/min11020157

journal article Open Access Feb 02, 2021

Understanding of Blast Furnace Performance with Biomass Introduction

Joel Orre Lena Sundqvist Ökvist Axel Bodén Bo Björkman

Minerals Vol. 11 No. 2 pp. 157 · MDPI AG

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Abstract

The blast furnace still dominates the production and supply of metallic units for steelmaking. Coke and coal used in the blast furnace contribute substantially to CO2 emissions from the steel sector. Therefore, blast furnace operators are making great efforts to lower the fossil CO2 emissions and transition to fossil-free steelmaking. In previous studies the use of pre-treated biomass has been indicated to have great potential to significantly lower fossil CO2 emissions. Even negative CO2 emission can be achieved if biomass is used together with carbon capture and storage. Blast furnace conditions will change at substantial inputs of biomass but can be defined through model calculations when using a model calibrated with actual operational data to define the key blast furnace performance parameters. To understand the effect, the modelling results for different biomass cases are evaluated in detail and the overall performance is visualised in Rist- and carbon direct reduction rate (CDRR) diagrams. In this study injection of torrefied biomass or charcoal, top charging of charcoal as well as the use of a combination of both methods are evaluated in model calculations. It was found that significant impact on the blast furnace conditions by the injection of 142 kg/tHM of torrefied biomass could be counteracted by also top-charging 30 kg/tHM of charcoal. With combined use of the latter methods, CO2-emissions can be potentially reduced by up to 34% with moderate change in blast furnace conditions and limited investments.

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Citations

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References

Details

Published: Feb 02, 2021
Vol/Issue: 11(2)
Pages: 157
License: View

Authors

J

Joel Orre

Metallurgy Department, Swerim, 974 37 Luleå, Sweden

L

Lena Sundqvist Ökvist

Metallurgy Department, Swerim, 974 37 Luleå, Sweden; Department of Civil, Environmental and Natural Resources Engineering, Minerals and Metallurgical Engineering, MiMeR, Luleå University of Technology, 971 87 Luleå, Sweden

A

Axel Bodén

Relitor, 973 34 Luleå, Sweden

B

Bo Björkman

Department of Civil, Environmental and Natural Resources Engineering, Minerals and Metallurgical Engineering, MiMeR, Luleå University of Technology, 971 87 Luleå, Sweden

Funding

Centre of Advanced Mining and Metallurgy Award: No Grant Number

Cite This Article

Joel Orre, Lena Sundqvist Ökvist, Axel Bodén, et al. (2021). Understanding of Blast Furnace Performance with Biomass Introduction. Minerals, 11(2), 157. https://doi.org/10.3390/min11020157

Understanding of Blast Furnace Performance with Biomass Introduction

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