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.
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| Department/Agency | Canada. Natural Resources Canada. Canada. Department of Energy, Mines and Resources. Canada. Mines Branch. |
|---|---|
| Title | Calcination of gibbsite / T.A. Wheat, Mineral Processing Division. |
| Series title | Reprint series ; RS 116 |
| Publication type | Series - View Master Record |
| Language | [English] |
| Format | Electronic |
| Electronic document | |
| 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. |
| Publishing information | Ottawa : Information Canada, 1972. |
| Author / Contributor | Wheat, T. A. |
| Description | p. 43-48 : charts, ill. |
| Catalogue number |
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| Departmental catalogue number | 300195 |
| Subject terms | Ceramics Minerals Processing |
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