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ASTM Selected Technical Papers
Symposium on Bulk Sampling
ISBN-10:
0-8031-6069-0
ISBN:
978-0-8031-6069-9
No. of Pages:
71
Publisher:
ASTM International
Publication date:
1952
eBook Chapter
The Design of Coal Sampling Procedures
By
W. M. Bertholf
W. M. Bertholf
1
Efficiency Engineer By-Product Coke Plant
, Colorado Fuel and Iron Corp.
, Pueblo, Colo
.
Search for other works by this author on:
Page Count:
20
-
Published:1952
Citation
Bertholf, WM. "The Design of Coal Sampling Procedures." Symposium on Bulk Sampling. Ed. Committee E-11, . 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959 : ASTM International, 1952.
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Equations relating the fundamental sampling constants of a coal (as variances) to the observed variance of a series of samples composed of N increments each of weight w are given. Suggestions are made for estimating the “trend” variance and charts are given for the more precise determination of the expected unit increment variance and the variance of the process of reduction and analysis of the gross sample. Several numerical examples are given to show the effect of changing the increment weight on the number required and to show the effect of changing the specified number on the total sample weight.
References
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B. A.
, “The Fundamentals of Coal Sampling
,” U.S. Bureau of Mines, Bulletin
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J.
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,” Fuel Economy Conference of the World Power Conference
, Section A2, Paper No. 4 (1947
).4.
Morrow
J. B.
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,” Am. Inst. Mining and Metallurgical Engrs., Technical Publication
645
(1935
).5.
Snedecor
George W.
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,” The Iowa State College Press
, Ames, Iowa
, p. 218 (1946
).6.
Bertholf
W. M.
, “The Analysis of Variance in a Sampling Experiment
,” see p. 36 of this publication.7.
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, “Handbook of Mineral Dressing
,” Sec. 19 (Taggart) John Wiley and Sons, Inc.
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A. B.
, “Application of the Theory of Sampling to Coal Sampling
,” Journal
, Institute of Fuel, Vol. 9
, p. 132 (1935
).Kassel
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,” Journal of Industrial and Engineering Chemistry
Anal. Ed., p. 7 (1935
) Appendix, general method.8.
Shewhart
Walter A.
, “Economic Control of Quality of Manufactured Product
,” Van Nostrand
, New York, N. Y.
(1931
).9.
Grumell and Dunningham
, “The Sampling of Small Fuel, up to 3-in.
,” British Engineering Standards Ass’n.
, No. 403
, (1930
).10.
Manning
A. B.
, “Theory of Coal Sampling
,” FUEL in Science and Practice
, Vol. 28
, p. 3 (1949
).11.
Gould
G. B.
, “Interpretation of Laboratory Coal Tests
,” Proceedings
, Am Soc. Testing Mats.
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, Part 2, p. 355 (1937
).12.
Guy
T. W.
, “Coal Preparation
,” Am. Inst. Mining and Metallurgical Engrs.
, p. 82 (1943
).
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