Experiences of Bio-Coal Applications in the Blast Furnace Process—Opportunities and Limitations

Minerals

Maria Lundgren¹  Lena Sundqvist Ökvist¹ 

[1] Swerim AB, Box 812, 971 25 Luleå, Sweden;

关键词: biomass;    bio-coal;    charcoal;    reducing agent;    briquettes;    injection;   

DOI  :  10.3390/min11080863

来源: DOAJ

【 摘 要 】

Metal production, and especially iron ore-based steel production, is characterized by high fossil CO₂ emissions due of the use of coal and coke in the blast furnace. Steel companies around the world are striving to reduce the CO₂ emissions in different ways, e.g., by use of hydrogen in the blast furnace or by production of iron via direct reduction. To partially replace fossil coal and coke with climate neutral bio-coal products that are adapted for use in the metal industry, e.g., at the blast furnace, is a real and important opportunity to significantly lower the climate impact in a short-term perspective. Top-charging of bio-coal directly to the blast furnace is difficult due to its low strength but can be facilitated if bio-coal is added as an ingredient in coke or to the mix when producing residue briquettes. Bio-coal can also be injected into the lower part of the blast furnace and thereby replace a substantial part of the injected pulverized coal. Based on research work within Swerim, where the authors have been involved, this paper will describe the opportunities and limitations of using bio-coal as a replacement for fossil coal as part of coke, as a constituent in residue briquettes, or as replacement of part of the injected pulverized coal. Results from several projects studying these opportunities via technical scale, as well as pilot and industrial scale experiments and modelling will be presented.

【 授权许可】

Unknown