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- Andersson, AntonLuleå tekniska universitet,Mineralteknik och metallurgi,Luleå University of Technology, Sweden (author)
Upgrading of Blast Furnace Sludge and Recycling of the Low-Zinc Fraction via Cold-bonded Briquettes
- Article/chapterEnglish2019
Publisher, publication year, extent ...
- 2019-05-09
- Springer,2019
- printrdacarrier
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- LIBRIS-ID:oai:DiVA.org:ltu-73899
- https://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-73899URI
- https://doi.org/10.1007/s40831-019-00225-xDOI
- https://urn.kb.se/resolve?urn=urn:nbn:se:ri:diva-39411URI
Supplementary language notes
- Language:English
- Summary in:English
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- SwePubSwePub
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Notes
- Validerad;2019;Nivå 2;2019-09-27 (johcin)
- Depending on the operation of the blast furnace (BF), the main outlet of zinc from the furnace is more or less via the BF dust and sludge. As the dust is recycled to the BF, the sludge has to be de-zinced prior to recycling to prevent the accumulation of zinc in the BF. De-zincing and recycling of the low-zinc fraction via sinter have been reported. However, no research con-cerning recycling of upgraded BF sludge via cold-bonded briquettes has been performed. In the present study, a fine-grained BF sludge with low zinc content, generated by a BF operating on a ferrous burden of 100% pellets, was upgraded using the tornado process. The process simultaneously dried and separated the BF sludge into a high-zinc and a low-zinc fraction. The feasibility of recycling the low-zinc fraction to the BF using cold-bonded briquettes was studied on a laboratory-scale BF shaft simulator. On comparison with a reference briquette, the experiments indicated that 10 wt% of the upgraded BF sludge can be added to the briquette without negatively affecting the reducibility. Higher additions were found to render the briquette less reduced compared to the reference under test conditions corresponding to the central part of the BF. The strength of the briquettes was not compromised with the addition of the upgraded BF sludge, and a decision to study the briquettes in the LKAB experimental blast furnace was made in order to evaluate the behavior under actual BF conditions.
Subject headings and genre
- TEKNIK OCH TEKNOLOGIER Materialteknik Metallurgi och metalliska material hsv//swe
- ENGINEERING AND TECHNOLOGY Materials Engineering Metallurgy and Metallic Materials hsv//eng
- Blast furnace sludge
- Recycling
- Upgrading
- De-zincing
- Cold-bonded briquettes
- Laboratory-scale blast furnace
- Process Metallurgy
- Processmetallurgi
Added entries (persons, corporate bodies, meetings, titles ...)
- Gullberg, AmandaRISE,MEFOS AB,Swerea MEFOS, Luleå, Sweden (author)
- Kullerstedt, AdelineRISE,MEFOS AB,Swerea MEFOS, Luleå, Sweden (author)
- Ahmed, HeshamLuleå tekniska universitet,Mineralteknik och metallurgi,Central Metallurgical Research and Development Institute, Cairo, Egypt,Luleå University of Technology, Sweden; Central Metallurgical Research and Development Institute, Egypt(Swepub:ltu)hesahm (author)
- Sundqvist Ökvist, LenaRISE,Luleå tekniska universitet,Mineralteknik och metallurgi,Swerea MEFOS, Luleå, Sweden,MEFOS AB,Luleå University of Technology, Sweden(Swepub:ltu)lensun (author)
- Samuelsson, CaisaLuleå tekniska universitet,Mineralteknik och metallurgi,Luleå University of Technology, Sweden(Swepub:ltu)casa (author)
- Luleå tekniska universitetMineralteknik och metallurgi (creator_code:org_t)
Related titles
- In:Journal of Sustainable Metallurgy: Springer:3, s. 350-3612199-38232199-3831
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