Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • 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
CFD modelling of the flow through a grate-kiln
2009 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

LKAB is an international high-tech minerals group, one of the world's leading producers of upgraded iron ore products for the steel industry and a growing supplier of industrial minerals products to other sectors. Over the last years, the swedish industry has been facing increasing governmental pressure to control and reduce pollutant emissions, one of which is nitrogen oxides NOx. The pelletizing process requires high excess air levels and high temperatures, which promotes the production of NOx. Consequently, LKAB is running several research projects with the objective to reduce NOx emissions from the company's pellet production plants, including both primary and secondary measures. This work is part of an investigation whether Selective Non-Catalytic Reduction (SNCR) is suitable for reducing NOx emissions in LKAB's grate-kiln iron ore pelletizing plant SK. The motivation of this specific research is to develop a CFD model that enhances the understanding of the aerodynamics and mixing of species inside the rotary kiln. At first, a parametric study of the pure airflow through the kiln is carried out and under certain conditions, a transient behaviour similar to that of vortex shedding is observed, with a strong dependence on momentum flux ratio between the secondary air jets. Further, the development of a preliminary coal combustion model is set out, which is in need of continued work in order to produce reliable predictions of various parameters relevant to the SNCR process. However, the effect of the combustion on the flow field is limited, indicating that the pure airflow model can be used to broadly investigate the influence of the secondary air flow.

Place, publisher, year, edition, pages
2009.
Keyword [en]
Technology
Keyword [sv]
Teknik
Identifiers
URN: urn:nbn:se:ltu:diva-47750ISRN: LTU-EX--09/143--SELocal ID: 5446bbd6-e15b-422f-a99e-a1f3801e004fOAI: oai:DiVA.org:ltu-47750DiVA, id: diva2:1021078
Subject / course
Student thesis, at least 30 credits
Educational program
Mechanical Engineering, master's level
Examiners
Note
Validerat; 20101217 (root)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

Open Access in DiVA

fulltext(20874 kB)36 downloads
File information
File name FULLTEXT02.pdfFile size 20874 kBChecksum SHA-512
76adcce2123f91772a335fe6ce607de1efe3de8bc98b7652a5fad8d18824cdb928a38f874ea72c7ea7df21b064ecba1db4b9ddd2202e3252b72c3155c0bfc0db
Type fulltextMimetype application/pdf

Search outside of DiVA

GoogleGoogle Scholar
Total: 36 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

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

Direct link
Cite
Citation style
  • apa
  • 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
v. 2.34-SNAPSHOT
|