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
Optimizing the slag system for phosphorus removal in a DRI-based EAF-process using the dictionary attack method
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering.
2018 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Abstract Carbon emissions pose a serious threat to the continued survival of this planet. All sectors of society must, therefore, lower their emissions, this includes the steel industry. The production of steel is based on iron ore reduction by carbon. In an attempt to relieve the steel industry from its inherent fossil dependence an initiative called HYBRIT has been started. It aims to supplant carbon reduction with hydrogen reduction. Currently, there is no economically viable industrial production of steel that uses fossil-free hydrogen as reduction agent. In order to create economic viability for such a process work has to be conducted to innovate and optimize. This study aims to be a part of that optimization process by creating a tool for optimizing the slag system with regards to phosphorus removal. 26843 slag compositions were evaluated using modules written in “Matlab” combined with “Thermo-Calc”. 1583 possible slag compositions were found to be suitable for phosphorus removal. These compositions were then optimized after slag weight in order to minimize slag associated cost. The compositions were tested against two theoretical raw materials with varying initial phosphorus content 250 ppm and 125 ppm. It was found that the initial phosphorus concentration of the raw material has a substantial impact not only on the slag costs but also the slag praxis that should be used.

Place, publisher, year, edition, pages
2018. , p. 45
Keywords [en]
Slag, Optimization, Electric arc furnace, Phosphorus removal, HYBRIT
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:kth:diva-229743OAI: oai:DiVA.org:kth-229743DiVA, id: diva2:1214302
External cooperation
SSAB AB Oxelösund
Subject / course
Process Science of Materials
Educational program
Master of Science in Engineering - Materials Design and Engineering
Supervisors
Examiners
Available from: 2018-06-07 Created: 2018-06-06 Last updated: 2018-06-07Bibliographically approved

Open Access in DiVA

fulltext(3748 kB)119 downloads
File information
File name FULLTEXT01.pdfFile size 3748 kBChecksum SHA-512
9ba89f20b1d01a5e67b91b70d083d7248ab2f8ba62431666c22fed949311f7427261aec0c3cbb359caadbf898a42527481dfea373d7d286d791f7df9d29613c5
Type fulltextMimetype application/pdf

By organisation
Materials Science and Engineering
Natural Sciences

Search outside of DiVA

GoogleGoogle Scholar
Total: 119 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: 348 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