On-line determination of the ash content of coal using a “Siroash” gauge based on the transmission of low and high energy γ-rays

A gauge based on measurements of the transmission through coal of low and high energy γ-rays has been developed for the on-line determination of the ash content. The SIROASH (C SIRO ASH) gauge has been tested on the final product line of a coal washery at Gregory, Queensland, Australia. The r.m.s. d...

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Bibliographic Details
Published in:The International journal of applied radiation and isotopes 1983, Vol.34 (1), p.63-69
Main Authors: Fookes, R.A., Gravitis, V.L., Watt, J.S., Hartley, P.E., Campbell, C.E., Howells, E., McLennan, T., Millen, M.J.
Format: Article
Language:English
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Summary:A gauge based on measurements of the transmission through coal of low and high energy γ-rays has been developed for the on-line determination of the ash content. The SIROASH (C SIRO ASH) gauge has been tested on the final product line of a coal washery at Gregory, Queensland, Australia. The r.m.s. difference between ash determined on-line and ash determined by chemical assay of coal sampled from the conveyor was 0.45 wt 0 0. Chemical assay and sampling errors, estimated to be between 0.2 and 0.3 wt 0 0 ash, contribute to this difference. The SIROASH gauge measures coal directly on the conveyor, and can be calibrated using standard samples by moving it beyond the edge of the conveyor belt.
ISSN:0020-708X
DOI:10.1016/0020-708X(83)90117-5