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Effect of processing parameters on the swelling behaviour of cement-bonded briquettes
Luleå tekniska universitet.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.
2004 (English)In: ISIJ International, ISSN 0915-1559, E-ISSN 1347-5460, Vol. 44, no 1, p. 59-68Article in journal (Refereed) Published
Abstract [en]

The use of cement-bonded agglomerates of iron-rich by-products generated in iron and steel plants as burden material for blast furnaces is becoming quite common. It has been observed that under certain conditions the briquettes containing pellet-fines show a tendency to swell catastrophically when reduced at 900-1000DGC using carbon monoxide as a reducing agent. This swelling is dependent upon a number of processing parameters, such as: composition of briquettes, particle size of raw material, amount of cement, composition of cement, and coke content. It is not dependent upon the size of agglomerate or hydration period. From the optical micrographs, it is apparent that the swelling may be attributed to the formation of small spheroidal iron particles that move apart, thereby causing swelling. This paper describes the effect of various processing parameters that cause the abnormal swelling in cement-bonded briquettes made of pellet-fines.

Place, publisher, year, edition, pages
2004. Vol. 44, no 1, p. 59-68
National Category
Metallurgy and Metallic Materials
Research subject
Process Metallurgy
Identifiers
URN: urn:nbn:se:ltu:diva-8506DOI: 10.2355/isijinternational.44.59ISI: 000220206500008Local ID: 70568d40-6ff6-11db-962b-000ea68e967bOAI: oai:DiVA.org:ltu-8506DiVA, id: diva2:981444
Note
Validerad; 2004; 20061109 (ysko)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Björkman, Bo

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