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- W4240356502 abstract "Nickeliferous laterite ores contain large amounts of both free and combined water which are removed during processing for metal extraction. In this study, the application of microwaves for the drying of a briquetted nickeliferous limonitic laterite ore, was investigated. Microwave drying tests were performed at a frequency of 2460 MHz and the sample mass was continuously monitored in order to determine the drying rate. The variables investigated were sample mass, microwave power, briquette aspect ratio, specific surface area and compaction pressure. For comparison purposes, conventional drying tests were performed in the temperature range of 44 to 228°C. It was found that the microwave drying rates were two to three times higher than the conventional drying rates. This was attributed to the inverse temperature gradient with microwave heating which promoted enhanced mass transfer of the water.Les minerais nickélifères de latérite contiennent de grandes quantités d’eau tant à l’état libre que combinées qui sont enlevées lors du traitement d’extraction du métal. Dans cette étude, on a investigué l’utilisation des micro-ondes pour le séchage d’un minerai nickélifère briqueté de latérite limonitique. On a effectué des essais de séchage par micro-ondes à une fréquence de 2460 MHz alors que la masse de l’échantillon était continuellement surveillée afin de déterminer le taux de séchage. Les variables étudiées incluaient la masse de l’échantillon, la puissance du micro-onde, le rapport longueur/diamètre de la briquette, la surface spécifique et la pression de compaction. Pour le but de comparaison, on a effectué des essais de séchage conventionnel dans la gamme de température de 44 à 228°C. On a trouvé que les taux de séchage par micro-ondes étaient deux ou trois fois plus élevés que les taux de séchage conventionnel. Ceci était attribué au gradient inverse de température du chauffage par micro-ondes qui favorisait un transfert amélioré de la masse d’eau." @default.
- W4240356502 created "2022-05-12" @default.
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- W4240356502 date "2005-01-01" @default.
- W4240356502 modified "2023-10-18" @default.
- W4240356502 title "MICROWAVE DRYING OF NICKELIFEROUS LIMONITIC LATERITE ORES" @default.
- W4240356502 cites W1983385734 @default.
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- W4240356502 doi "https://doi.org/10.1179/000844305794409418" @default.
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