Calcination of gibbsite / T.A. Wheat, Mineral Processing Division. : M38-8/116E-PDF
"Data are presented showing the changes in physical properties which occur during the calcination of Bayer-process gibbsite at temperatures up to 1400°C. The various stages of the calcination were examined using differential thermal analysis, X-ray diffraction, low-temperature nitrogen adsorption, optical and electron microscopy, and particle-size distribution analyses. The morphology of the gibbsite aggregates was found to be unchanged up to ~ 1100°C, despite the development of several intermediate metastable phases. At higher temperatures, the original gibbsite pseudomorphs become microporous coincident with the development of finely divided alpha-alumina which is formed in a strain-free state. The crystal size and pore size increase with temperature between 1100 and 1400°C. The influence of the parent gibbsite structure on the morphology of the alpha-phase material is demonstrated in scanning-electron micrographs. The effect of various parameters on the milling of high-temperature calcines is also discussed"--Abstract, p. 43.
Lien permanent pour cette publication :
publications.gc.ca/pub?id=9.840868&sl=1
| Ministère/Organisme | Canada. Natural Resources Canada. Canada. Department of Energy, Mines and Resources. Canada. Mines Branch. |
|---|---|
| Titre | Calcination of gibbsite / T.A. Wheat, Mineral Processing Division. |
| Titre de la série | Reprint series ; RS 116 |
| Type de publication | Série - Voir l'enregistrement principal |
| Langue | [Anglais] |
| Format | Électronique |
| Document électronique | |
| Note(s) | Cover title. "Reprinted from the Journal of the Canadian Ceramics Society, (1971), vol. 40, pp. 43-48." Historical publication digitized from print 2017 [by Natural Resources Canada]. Includes bibliographical references. |
| Information sur la publication | Ottawa : Information Canada, 1972. |
| Auteur / Contributeur | Wheat, T. A. |
| Description | p. 43-48 : charts, ill. |
| Numéro de catalogue |
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| Numéro de catalogue du ministère | 300195 |
| Descripteurs | Ceramics Minerals Processing |
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