Determination of carbon in fly ash

G - Physics – 01 – N

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324/30

G01N 22/00 (2006.01) G01N 15/06 (2006.01)

Patent

CA 1322222

ABSTRACT Methods and apparatus for the determination of the unburnt carbon content of fly ash. A microwave signal is transmitted through or reflected from a fly ash sample and the attenuation and/or phase shift of the transmitted or reflected signal is determined with respect to the incident signal and used to provide a measure of unburnt carbon content. The invention is applicable to measurement of fly ash samples taken from a boiler outlet duct or for direct measurement of the unburnt carbon content of fly ash entrained in flue gas.

612627

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