Ändra sökning
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
The effect of disintegrated iron-ore pellet dust on deposit formation in a pilot-scale pulverized coal combustion furnace: Part I: Characterization of process gas particles and deposits
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Energivetenskap.
Luossavaara-Kiirunavaara Aktiebolag (LKAB).
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Energivetenskap. RISE ETC (Energy Technology Centre) AB.ORCID-id: 0000-0002-9395-9928
Loussavaara-Kiirunavaara Limited, Luleå.
Visa övriga samt affilieringar
2018 (Engelska)Ingår i: Fuel processing technology, ISSN 0378-3820, E-ISSN 1873-7188, Vol. 177, s. 283-298Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

o initiate the elucidation of deposit formation during the iron-ore pelletization 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 grate-kiln setup. Particles and deposits were sampled from 3 positions of different temperature via a water-cooled sampling probe. Three distinct fragmentation modes were identified based on the aerodynamic particle diameter (Dp). The fine mode: Particles with 0.03 < Dp < 0.06 μm. The first fragmentation mode: Particles with 1 < Dp < 10 μm. The second fragmentation mode: Coarse particles (cyclone particles, Dp > 10 μm). A transition from a bimodal PSD (particle size distribution) to a trimodal PSD was observed when pellet dust was added (Case 3) and consequently the elemental bulk composition of the abovementioned modes was changed. The most extensive interaction between pellet dust and coal-ash particles was observed in the coarse mode where a significant number of coal ash globules were found attached to the surface of the hematite particles. The morphology of the sharp-edged hematite particles was changed to smooth-edged round particles which proved that hematite particles must have interacted with the surrounding aluminosilicate glassy phase originating from the coal ash. The short-term deposits collected during coal combustion (Case 1) were highly porous in contrast to the high degree of sintering observed in the experiments with pellet dust addition (Case 3) which is attributed to the dissolution of hematite particles in the aluminosilicate glassy phase. The results suggest that pellet dust itself (Case 2) has low slagging tendency, independent of temperature. However, when coal-ash is present (Case 3), auxiliary phases are added such that tenacious particles are formed and slagging occurs.

Ort, förlag, år, upplaga, sidor
Elsevier, 2018. Vol. 177, s. 283-298
Nationell ämneskategori
Energiteknik Kemiteknik Kemiska processer
Forskningsämne
Energiteknik; Kemisk teknologi
Identifikatorer
URN: urn:nbn:se:ltu:diva-68712DOI: 10.1016/j.fuproc.2018.05.004ISI: 000437819600030Scopus ID: 2-s2.0-85046802389OAI: oai:DiVA.org:ltu-68712DiVA, id: diva2:1205423
Anmärkning

Validerad;2018;Nivå 2;2018-05-14 (andbra)

Tillgänglig från: 2018-05-14 Skapad: 2018-05-14 Senast uppdaterad: 2019-01-18Bibliografiskt granskad

Open Access i DiVA

Fulltext saknas i DiVA

Övriga länkar

Förlagets fulltextScopus

Personposter BETA

Sefidari, HamidWiinikka, HenrikMouzon, JohanneBhuiyan, Iftekhar UddinÖhman, Marcus

Sök vidare i DiVA

Av författaren/redaktören
Sefidari, HamidWiinikka, HenrikMouzon, JohanneBhuiyan, Iftekhar UddinÖhman, Marcus
Av organisationen
EnergivetenskapKemiteknik
I samma tidskrift
Fuel processing technology
EnergiteknikKemiteknikKemiska processer

Sök vidare utanför DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetricpoäng

doi
urn-nbn
Totalt: 72 träffar
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf