Fast neutron activation analysis of bulk coal samples for alumina,silica and ash |
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Authors: | M Borsaru P.J Mathew |
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Affiliation: | CSIRO Division of Mineral Physics, P.O. Box 124, Port Melbourne, Vic. 3207 Australia |
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Abstract: | The fast neutron activation technique was applied to bulk samples (≈11 kg) of Australian black coal. The determination of alumina is based on the reaction 27Al(n,p)-27Mg by counting the 0.844-MeV peak (t = 9.4 min). Silica is determined by means of the reaction 28Si(n,p)28Al; the 1.78-MeV peak (t = 2.3 min) is counted and a correction for the interference from alumina is applied. The ash content is based on the correlation between ash and the sum of alumina and silica. The accuracies (1 SD) for the determination of alumina, silica and ash were 0.52% Al2O3, 0.79% SiO2 and 1.02% ash, respectively. The ash, alumina and silica contents of the samples were in the ranges 8.8–37.5%, 1.3–10.3% and 6.4–22%, respectively. |
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