00000000nam 2200000za 4500
0019.840868
003CaOODSP
00520221107151941
007cr |||||||||||
008170802s1972    oncad   ob   f000 0 eng d
040 |aCaOODSP|beng
043 |an-cn---
0861 |aM38-8/116E-PDF|zM38-8/116
1001 |aWheat, T. A.
24510|aCalcination of gibbsite |h[electronic resource] / |cT.A. Wheat, Mineral Processing Division.
260 |aOttawa : |bInformation Canada, |c1972.
300 |ap. 43-48 : |bcharts, ill.
4901 |aReprint series ; |vRS 116
500 |aCover title.
500 |a"Reprinted from the Journal of the Canadian Ceramics Society, (1971), vol. 40, pp. 43-48."
500 |aHistorical publication digitized from print 2017 [by Natural Resources Canada].
504 |aIncludes bibliographical references.
5203 |a"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.
69207|2gccst|aCeramics
69207|2gccst|aMinerals
69207|2gccst|aProcessing
7101 |aCanada. |bNatural Resources Canada.
7101 |aCanada. |bDepartment of Energy, Mines and Resources.
7101 |aCanada. |bMines Branch.
830#0|aReprint series - Dept. of Energy, Mines and Resources, Mines Branch ;|vRS 116|w(CaOODSP)9.834843
85640|qPDF|s2.92 MB|uhttps://publications.gc.ca/collections/collection_2017/rncan-nrcan/M38-8/M38-8-116-eng.pdf
986 |a300195