Change search
ReferencesLink to record
Permanent link

Direct link
Blast furnace pellet textures during reduction and correlation to strength
LKAB Research and Development.
LKAB Research and Development.
Swerea MEFOS AB.
Show others and affiliations
2010 (English)In: ISIJ International, ISSN 0915-1559, E-ISSN 1347-5460, Vol. 50, no 10, 1396-1405 p.Article in journal (Refereed) Published
Abstract [en]

The blast furnace is the most common means of producing hot metal. As the amounts of reduction agents increases, which influence in-furnace conditions such as ascending gas properties, temperature profiles and the ore-to-coke ratio, new demands are put on the iron-bearing material in terms of both reducibility and mechanical strength. To investigate the possibilities to use the Pellet Multi Press (PMP) equipment for compression strength measurements of reduced pellets and to gain a deeper understanding of the correlation between pellet texture and strength, an initial study of pellets taken from the LKAB Experimental Blast Furnace (EBF) was conducted. Furthermore, the pellet pieces generated after compression tests were characterized using light optical microscopy. In order to correlate the texture of pellet pieces to the pellet texture prior to breakage, a characterization of the chronological pellet texture development during reduction in the EBF was performed. The original pellet texture remained in the beginning of reduction and differences receded through the EBF shaft as wustite and Feme, was formed. Occurrence of Feme, in the pellet texture increased the compression strength, while less reduced and less sintered textures showed the reverse effect. So far, the results from compression strength tests indicate that disintegration of pellets takes place at a reaction front, at the transition between different texture types of iron oxide or at the location of a visible surface crack.

Place, publisher, year, edition, pages
2010. Vol. 50, no 10, 1396-1405 p.
Research subject
Process Metallurgy
URN: urn:nbn:se:ltu:diva-11712Local ID: ab81eaa0-ee40-11df-8b36-000ea68e967bOAI: diva2:984662
Validerad; 2010; 20101112 (ysko)Available from: 2016-09-29 Created: 2016-09-29Bibliographically approved

Open Access in DiVA

fulltext(12392 kB)2 downloads
File information
File name FULLTEXT01.pdfFile size 12392 kBChecksum SHA-512
Type fulltextMimetype application/pdf

Other links

Search in DiVA

By author/editor
Leimalm, UlrikaBjörkman, Bo
By organisation
Sustainable Process Engineering
In the same journal
ISIJ International

Search outside of DiVA

GoogleGoogle Scholar
Total: 2 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

Total: 1 hits
ReferencesLink to record
Permanent link

Direct link