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Rapid Determination of Ash in Coal by Compton Scattering, Ca, and Fe X-Ray Fluorescence

Published online by Cambridge University Press:  06 March 2019

Jacques Renault
Jacques Renault*
Affiliation:
New Mexico Bureau of Mines & Mineral Resources, Campus Station, Socorro, NM, 87801
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Abstract

The intensity of Compton scattering, Fe, and Ca chatacteristic radiation can be used to estimate the amount of ash in coal by Xray fluorescence spectroscopy. Mo, W, and Cr radiation were used to study a suite of New Mexico coals, and the best results were obtained with Mo and W X-ray tubes. If the actual concentrations of Fe2O3 and CaO and the mass absorption coefficient, μ*, at the Compton wavelength of scattered Mo K radiation can be determined, the regression equation:

%Ash - 24.2μ* - 6.28(%Fe2O3) - 1.96(%CaO) - 3.4

estimates the ash content with an average error of 0.5% ash at 0.71Å.

Type
XRF Applications in the Minerals Industry
Information
Advances in X-Ray Analysis , Volume 23: Twenty-Eighth Annual Conference on Applications of X-ray Analysis, July 30 - August 3, 1979 , 1979 , pp. 45 - 55
Copyright
Copyright © International Centre for Diffraction Data 1979

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References

1. American Society for Testing and Materials, 1977 Annual Book of Standards, pt. 26, 370 (1977).Google Scholar
2. Fookes, R. A., Gravitis, V. I., and Watt, J. S., “Determination of Ash Content of Coal by Mass Absorption Coefficient Measurements at Two X-Ray Energies,” Nucl. Tech. Miner, Resour., Proc. Int. Symp. 1977, IAEA; Vienna, Austria, 1967-82 (1978).Google Scholar
3. Boyce, I. S., Clayton, C. G., and Page, D., “Some Considerations Relating to the Accuracy of Measuring the Ash Content of Coal by X-Ray Backscattering,” Nucl. Tech. Miner. Resour., Proc. Int. Symp. 1977, IAEA: Vienna, Austria, 135-65 (1978).Google Scholar
4. Reynolds, R. C., Jr., “Matrix Corrections in Trace Element Analysis by X-Ray Fluorescence: Estimation of the Mass Absorption Coefficient by Compton Scattering,” Amer. Miner. 48:1133–43 (1964).Google Scholar
5. Reynolds, R. C., Jr., “Estimation of Mass Absorption Coefficients by Compton Scattering: Improvements and Extensions of the Method,” Amer. Miner., 52:1493–1502 (1967).Google Scholar