Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
The effect of disintegrated iron-ore pellet dust on deposit formation in a pilot-scale pulverized coal combustion furnace: Part II: Thermochemical equilibrium calculations and viscosity estimations
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Energy Science.
Luossavaara-Kiirunavaara Aktiebolag (LKAB).
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Energy Science. RISE ETC (Energy Technology Centre) AB.ORCID iD: 0000-0002-9395-9928
Loussavaara-Kiirunavaara Limited, Luleå.
Show others and affiliations
2018 (English)In: Fuel processing technology, ISSN 0378-3820, E-ISSN 1873-7188Article in journal (Refereed) Epub ahead of print
Abstract [en]

Fly ash particles from the combustion of solid-fuels together with disintegrated particles arising from iron-ore pellets result in accumulation of deposits on the refractory linings of the grate-kiln induration machine during the iron-ore pelletizing process. The deposits amass in the high-temperature regions of the induration furnace thus disturbing the flow of gas and pellets. Therefore, to tackle the above-mentioned issues, an understanding of deposit formation mechanism is of crucial importance. This study was conducted with the objective of addressing the effect of disintegrated iron-ore pellet dust on deposit formation and the mechanisms behind deposition (slagging) in the grate-kiln process. A comprehensive set of experiments was conducted in a 0.4 MW pilot-scale pulverized-coal- fired furnace where three different scenarios were considered as follows; Case 1 (reference case): Coal was combusted without the presence of pellet dust. Case 2: Natural gas was combusted together with simultaneous addition of pellet dust to the gas stream. Case 3: Coal was combusted together with the addition of pellet dust simulating the situation in the large-scale setup. Fly ash particles and short-term deposits were characterized and deposition was addressed in Part I of this study. In light of the experimental observations (Part I) and the thermochemical equilibrium calculations (Part II), a scheme of ash transformation during the iron-ore pelletizing process was proposed. The dissolution of hematite particles into the Ca-rich-aluminosilicate melt (from the coal-ash constituents) decreased the viscosity and resulted in the formation of stronger (heavily sintered) deposits. Overall, this pilot-scale work forms part of a wider study which aims at deepening the understanding of ash transformation phenomena during the large-scale pelletizing process.

Place, publisher, year, edition, pages
Elsevier, 2018.
National Category
Energy Engineering Chemical Engineering Metallurgy and Metallic Materials
Research subject
Energy Engineering; Chemical Technology; Process Metallurgy
Identifiers
URN: urn:nbn:se:ltu:diva-69019DOI: 10.1016/j.fuproc.2018.05.005OAI: oai:DiVA.org:ltu-69019DiVA, id: diva2:1211850
Available from: 2018-05-31 Created: 2018-05-31 Last updated: 2018-06-05

Open Access in DiVA

No full text in DiVA

Other links

Publisher's full text

Authority records BETA

Sefidari, HamidWiinikka, HenrikLennartsson, AndreasMouzon, JohanneBhuiyan, Iftekhar UddinÖhman, Marcus

Search in DiVA

By author/editor
Sefidari, HamidWiinikka, HenrikLennartsson, AndreasMouzon, JohanneBhuiyan, Iftekhar UddinÖhman, Marcus
By organisation
Energy ScienceMinerals and Metallurgical EngineeringChemical Engineering
In the same journal
Fuel processing technology
Energy EngineeringChemical EngineeringMetallurgy and Metallic Materials

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 29 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf