Heating index : estimation through numerical modeling of the sintering process and its relationship with sinter quality
IR@NML: CSIR-National Metallurgical Laboratory, Jamshedpur
View Archive Info| Field | Value | |
| Title |
Heating index : estimation through numerical
modeling of the sintering process and its relationship
with sinter quality
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| Creator |
Nistala, Harsha
Biswas, A Sinha, Moni |
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| Subject |
Materials Science
Metallurgy |
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| Description |
The temperature profile experienced by the sinter bed strongly influences iron ore sinter quality. Heating Index, defined as the area under the temperature-time curve for
temperatures greater than 12000C, is a parameter that can be derived from the sintering
temperature profile. Due to the difficulty associated with bed temperature measurement
during sintering, the heating index is not accurately estimated and its relationship with
sinter quality is not established. It is the objective of the present work to address this. In
this work, a one dimensional numerical model of the iron ore sintering process
incorporating important physico-chemical processes such as coke combustion,
calcination of limestone, evaporation and condensation of moisture, and melting and resolidification
was developed. A good agreement between experimental temperature
profiles obtained in the sinter pot and numerical temperature profiles was observed. The
numerical model was used to obtain bed temperature profiles at several depths in the
sinter bed which were then used to estimate the heating index at all depths. The heating
index was found to increase from top to bottom in the sinter bed as the time spent by the
mix at higher temperatures increases from top to bottom in the bed. The heating index
values at various heights were averaged to obtain an 'average heating index' for the whole
bed. Using pot sinter data, it was found that there exists a strong correlation between
average heating index and the Tumbler Index of sinter. The correlation was found to be
positive for sinter CaO levels greater than 10% and negative for CaO levels less than
10%. This study indicated that heating index can be used as a precursor to sinter quality
during continuous operation at the Sinter Plants.
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| Publisher |
CSIR-National Metallurgical Laboratory
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| Date |
2015
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://eprints.nmlindia.org/7405/1/93-105_ISSUE-2.pdf
Nistala, Harsha and Biswas, A and Sinha, Moni (2015) Heating index : estimation through numerical modeling of the sintering process and its relationship with sinter quality. Journal of Metallurgy and Materials Science, 57(2) . pp. 93-105. |
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| Relation |
http://eprints.nmlindia.org/7405
http://eprints.nmlindia.org/7405/ |
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