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Combustion Evaluation of Renewable Fuels for Iron-Ore Pellet Induration
RISE - Research Institutes of Sweden, Bioeconomy, ETC Energy Technology Center.ORCID iD: 0000-0002-9395-9928
RISE - Research Institutes of Sweden, Bioeconomy, ETC Energy Technology Center.ORCID iD: 0000-0003-2253-6845
RISE - Research Institutes of Sweden, Bioeconomy, ETC Energy Technology Center.ORCID iD: 0000-0002-6473-7090
LKAB, Sweden.
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2019 (English)In: Energy & Fuels, ISSN 0887-0624, E-ISSN 1520-5029Article in journal (Refereed) Epub ahead of print
Abstract [en]

Induration (or sintering) of iron-ore pellets requires high temperature (∼1300 °C), which today is generated by burning fuel oil in the firing zone of the straight-grate plant (SG) or coal in the rotary kiln of grate-kiln (GK) plants. In this study, ∼150 kWth combustion experiments were used to investigate the opportunity of totally replacing fuel oil with H2 or pyrolysis oil and replacing coal with wood pellets or black pellets powder. For SG plants, the fuel oil can probably be replaced with either H2 or pyrolysis oil without any major concerns, except for slightly or much higher NOx emissions in the case of pyrolysis oil and H2, respectively. For GK induration machines, it is probably challenging to replace coal entirely with biomass since the temperature profile will be different, and there is a risk for increased ash related operational problems. For both SG and GK plants, the slightly lower O2 concentration in the flue gas observed during biomass combustion (pyrolysis oil, wood pellets, and black pellets) may, however, be negative for the induration process, and this needs to be clarified in future research.

Place, publisher, year, edition, pages
American Chemical Society , 2019.
Keywords [en]
Coal, Fuel oils, Gas plants, Iron ore pellets, Iron ores, Pelletizing, Pyrolysis, Sintering, Biomass combustion, Combustion experiments, High temperature, Operational problems, Pellet induration, Renewable fuels, Straight grate, Temperature profiles, Coal combustion
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Natural Sciences
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URN: urn:nbn:se:ri:diva-39850DOI: 10.1021/acs.energyfuels.9b01356Scopus ID: 2-s2.0-85070712552OAI: oai:DiVA.org:ri-39850DiVA, id: diva2:1347260
Note

 Funding details: Energimyndigheten; Funding text 1: This work has been conducted as part of the HYBRIT research project RP1. We gratefully acknowledge financial support from the Swedish Energy Agency. HYBRIT (Hydrogen Breakthrough Ironmaking Technology) is a joint initiative of the three companies SSAB, LKAB, and Vattenfall with the aim of developing the world’s first fossil-free ore-based steelmaking route. Therese Vikström at RISE ETC is highly acknowledged for performing SEM/EDS analysis of impactor particles and the initial drawings of the experimental facility. Dr. Roger Molinder at RISE ETC is highly acknowledged for the linguistic improvement of the manuscript.

Available from: 2019-08-30 Created: 2019-08-30 Last updated: 2019-08-30Bibliographically approved

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Wiinikka, HenrikSepman, AlexeyÖgren, Yngve

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