Search: onr:"swepub:oai:DiVA.org:ri-35593" >
The effect of disin...
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
-
- Sefidari, Hamid (author)
- Luleå tekniska universitet,Energivetenskap
-
- Lindblom, Bo (author)
- Luleå tekniska universitet,Energivetenskap,Luossavaara-Kiirunavaara Aktiebolag (LKAB)
-
- Wiinikka, Henrik (author)
- Luleå tekniska universitet,RISE,ETC Energy Technology Center,Luleå University of Technology, Sweden,Energivetenskap,RISE ETC (Energy Technology Centre) AB
-
show more...
-
- Nordin, Lars Olof (author)
- LKAB, Sweden,Loussavaara-Kiirunavaara Limited, Luleå
-
- Lennartsson, Andreas (author)
- Luleå tekniska universitet,Mineralteknik och metallurgi
-
- Mouzon, Johanne (author)
- Luleå tekniska universitet,Kemiteknik
-
- Bhuiyan, Iftekhar Uddin (author)
- Luleå tekniska universitet,Kemiteknik
-
- Öhman, Marcus, 1969- (author)
- Luleå tekniska universitet,Energivetenskap
-
show less...
-
(creator_code:org_t)
- Elsevier BV, 2018
- 2018
- English.
-
In: Fuel processing technology. - : Elsevier BV. - 0378-3820 .- 1873-7188. ; 180, s. 189-206
- Related links:
-
https://urn.kb.se/re...
-
show more...
-
https://doi.org/10.1...
-
https://urn.kb.se/re...
-
show less...
Abstract
Subject headings
Close
- 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.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Energiteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Energy Engineering (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Kemiteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Chemical Engineering (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Metallurgi och metalliska material (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Metallurgy and Metallic Materials (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Kemiteknik -- Kemiska processer (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Chemical Engineering -- Chemical Process Engineering (hsv//eng)
Keyword
- Coal combustion
- Deposition (slagging)
- Iron-ore pellet dust
- Iron-ore pelletizing
- Thermochemical equilibrium calculations
- Calcium compounds
- Coal
- Coal ash
- Coal deposits
- Coal dust
- Deposits
- Economic geology
- Fly ash
- Furnaces
- Hematite
- Iron deposits
- Iron ore pellets
- Iron ores
- Kilns
- Pelletizing
- Pulverized fuel
- Viscosity
- Alumino-silicate melts
- Combustion of solid fuels
- Deposit formation mechanism
- Iron ore pelletizing
- Pulverized coal combustion
- Pulverized coal-fired furnaces
- Thermochemical equilibrium
- Viscosity estimation
- Energy Engineering
- Chemical Technology
- Process Metallurgy
Publication and Content Type
- ref (subject category)
- art (subject category)
Find in a library
To the university's database