ISSN 2594-357X
6º Simpósio Brasileiro de Minério de Ferro — Vol. 01 , num. 6 (2005)
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SIRO-Indur, a mathematical process model of iron ore induration developed by CSIRO Minerals, has been used to evaluate the effect of goethite on a fictional straight-grate induration furnace processing hematite pellets. Changes in goethite content and dehydration kinetics were evaluated, as was the inclusion of a dehydration zone. Increases in the amount of goethite increased the fuel requirement for induration and high goethite levels of 20% or more suggested that spalling could be a problem. Lowering the dehydration temperature of the goethite resulted in it dehydrating during down-draft drying, lowering the pellet temperatures in that zone and reducing the risk of spalling. The inclusion of a dehydration zone in the induration furnace improved furnace performance provided additional primary cooling air was supplied.
SIRO-Indur, a mathematical process model of iron ore induration developed by CSIRO Minerals, has been used to evaluate the effect of goethite on a fictional straight-grate induration furnace processing hematite pellets. Changes in goethite content and dehydration kinetics were evaluated, as was the inclusion of a dehydration zone. Increases in the amount of goethite increased the fuel requirement for induration and high goethite levels of 20% or more suggested that spalling could be a problem. Lowering the dehydration temperature of the goethite resulted in it dehydrating during down-draft drying, lowering the pellet temperatures in that zone and reducing the risk of spalling. The inclusion of a dehydration zone in the induration furnace improved furnace performance provided additional primary cooling air was supplied.
Palavras-chave
Iron ore pellets, Mathematical modelling, Goethite, Induration.
Iron ore pellets, Mathematical modelling, Goethite, Induration.
Como citar
Firth, AR; Saunders, DB; Trang, SCT; Thurlby, JA.
SENSITIVITY TO MINERAL COMPOSITION AND REACTIVITY IN PELLET INDURATION – A MODELLING APPROACH USING SIRO-INDUR,
p. 135-144.
In: 6º Simpósio Brasileiro de Minério de Ferro,
None,
2005.
ISSN: 2594-357X, DOI 10.5151/2594-357x-6MinFe - 135-144
