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Canadian Metallurgical Quarterly
The Canadian Journal of Metallurgy and Materials Science
Volume 50, 2011 - Issue 1
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Original Article

Influence of process parameters on reduction contours during production of ferrochromium in submerged arc furnace

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Pages 37-44 | Received 04 Feb 2010, Accepted 09 Aug 2010, Published online: 22 Nov 2013
 

Abstract

Contours of iso‐reduction lines in the submerged arc furnace producing ferrochromium were constructed using a mathematical model based on the temperature profile inside the furnace and the kinetics of reduction of chromite ores. The location and the contours of the iso‐reduction lines are significantly influenced by the temperature profile in the furnace. From the model, it is found that ∼27% of the furnace volume is used for the reduction of the ore. The contours are significantly influenced by the degree of pre‐reduction of the ore charged into the furnace. The iso‐reduction lines can be used for enhancing the efficiency of the process and for better control of the operation exploiting options such as intelligent distribution of charge materials over the charge bed.

On a construit des lignes de contour d’iso‐réduction dans le four à arc submergé produisant du ferrochrome en utilisant un modèle mathématique basé sur le profil de température à l’intérieur du four et sur la cinétique de réduction des minerais de chromite. La localisation et les contours des lignes d’iso‐réduction sont influencés significativement par le profil de température dans le four. À partir du modèle, on a trouvé qu’environ 27% du volume du four était utilisé pour la réduction du minerai. Les contours sont influencés significativement par le degré de pré‐réduction du minerai chargé dans le four. On peut utiliser les lignes d’iso‐réduction pour augmenter le rendement du traitement et pour mieux contrôler les options d’exploitation de l’opération comme la distribution intelligente des matériaux de la charge sur le lit de chargement.

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