ISSN 2594-5327
49º Congresso anual — Vol. 49, Num. 1 (1994)
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High level performance and lower production cost have been achieved at sintering plants of ILVA Laminati Piani (ILP) Taranto Works, by optimising both technical and operational parameters and by using the results of researches carried out by Centro Sviluppo Materiali (CSM). Particular attention has been paid to the improvement of sinter mixture permeability, which is a key factor to improve productivity of the plant. More in-depth studies were recently carried out aimed at the improvement of process performance and costs, in particular to increase the productivity above a level of 40 t/m²x24h. These studies have considered the mineralogical nature of iron ores and distribution of SiO₂ in different grain sizes. Series of trials carried out at CSM pilot plant allowed a determination of influence of these characteristics on sintering, in terms of productivity, coke consumption and sinter quality. The influence of the mineralogical structures, at increasing degrees of weathering, on the energy consumption of process has been quantified and sinter strength after reduction (RDI) has been evaluated. Regarding the SiO₂ grain sizes distribution, a positive effect due to increase of the IB2 index of fines granulating fraction (<0.50 mm), has been found. These results are being taken into consideration at the ILP Taranto Works together with the traditional parameters (chemical composition, size distribution and permeability) in the definition of the sinter mixtures compositions.High level performance and lower production cost have been achieved at sintering plants of ILVA Laminati Piani (ILP) Taranto Works, by optimising both technical and operational parameters and by using the results of researches carried out by Centro Sviluppo Materiali (CSM). Particular attention has been paid to the improvement of sinter mixture permeability, which is a key factor to improve productivity of the plant. More in-depth studies were recently carried out aimed at the improvement of process performance and costs, in particular to increase the productivity above a level of 40 t/m²x24h. These studies have considered the mineralogical nature of iron ores and distribution of SiO₂ in different grain sizes. Series of trials carried out at CSM pilot plant allowed a determination of influence of these characteristics on sintering, in terms of productivity, coke consumption and sinter quality. The influence of the mineralogical structures, at increasing degrees of weathering, on the energy consumption of process has been quantified and sinter strength after reduction (RDI) has been evaluated. Regarding the SiO₂ grain sizes distribution, a positive effect due to increase of the IB2 index of fines granulating fraction (<0.50 mm), has been found. These results are being taken into consideration at the ILP Taranto Works together with the traditional parameters (chemical composition, size distribution and permeability) in the definition of the sinter mixtures compositions.
Palavras-chave
Iron ores, Sintering process, Mineralogical structure, SiO₂ distribution, Productivity
Como citar
Pastore, Martino; Pinti, Medardo; Quaranta, Giancarlo.
Effect of Mineralogical Structures and of SiO₂ Distribution in Iron Ores on Sintering Process,
p. 3293-3306.
In: 49º Congresso anual,
Rio de Janeiro, Brasil,
1994.
ISSN: 2594-5327, DOI 10.5151/2594-5327-49v7-343-356
