ASTM D3173-11

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Designation: D3173 − 11
Standard Test Method for
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Moisture in the Analysis Sample of Coal and Coke
This standard is issued under the fixed designation D3173; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope Method D3302 to determine total moisture in coal. Total
moisture is used for calculating other analytical results to “as
1.1 Thistestmethodcoversthedeterminationofmoisturein
received” basis using Practice D3180. Moisture, ash, volatile
the analysis sample of coal or coke. It is used for calculating
matter, and fixed carbon percents constitute the proximate
other analytical results to a dry basis. When used in conjunc-
analysis of coal and coke.
tion with the air drying loss as determined in accordance with
Method D2013 or Practice D346, each analytical result can be
5. Analysis Sample
calculated to an as-received basis:
5.1 The analysis sample is that sample which has been
1.2 This standard does not purport to address all of the
pulverized to pass 250-µm (No. 60) sieve as prepared in
safety concerns, if any, associated with its use. It is the
accordance with Practice D346 or Method D2013.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
6. Apparatus
bility of regulatory limitations prior to use.
6.1 Drying Oven, for coal samples:
6.1.1 Fordeterminingthemoistureofcoal,theovenshallbe
2. Referenced Documents
so constructed as to have a uniform temperature in all parts,
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2.1 ASTM Standards:
have a minimum of air space, and be capable of temperature
D346 Practice for Collection and Preparation of Coke
regulation between the limits of 104 and 110°C. It may be of
Samples for Laboratory Analysis
theformshowninFig.1.Provisionshallbemadeforrenewing
D2013Practice for Preparing Coal Samples for Analysis
the preheated air in the oven at the rate of two to four times a
D3180Practice for Calculating Coal and Coke Analyses
minute, with the air dried as defined in 7.1.
from As-Determined to Different Bases
6.1.2 In the oven shown in Fig. 1, the door should contain a
D3302Test Method for Total Moisture in Coal
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hole of approximately 3.2 mm ( ⁄8 in.) in diameter near the
bottom to permit a free flow of air through the oven space.
3. Summary of Test Method
6.2 Drying Oven, for coke samples. For determining the
3.1 Moisture is determined by establishing the loss in
moisture of coke, an ordinary drying oven with openings for
weight of the sample when heated under rigidly controlled
natural air circulation and capable of temperature regulation
conditions of temperature, time and atmosphere, sample
between limits of 104 and 110°C may be used.
weight, and equipment specifications.
6.3 Capsules,withcovers.Aconvenientform,whichallows
4. Significance and Use
the ash determination to be made on the same sample, is a
7 3
4.1 Moisture as determined by this test method is used for
porcelain capsule, 22 mm ( ⁄8 in.) in depth and 44 mm (1 ⁄4 in.
calculating other analytical results to a moisture free basis ) in diameter, or a fused silica capsule of similar shape. These
using procedures in Practice D3180. Moisture percent deter-
capsules shall be used with a well-fitting flat aluminum cover,
mined by this test method may be used in conjunction with the illustrated in Fig. 2. Platinum crucibles or glass capsules with
air-dry moisture loss determined in Method D2013 and Test
ground-glasscapsmayalsobeused.Theyshouldbeasshallow
as possible, consistent with convenient handling.
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This test method is under the jurisdiction of ASTM Committee D05 on Coal
7. Reagents
and Coke and is the direct responsibility of Subcommittee D05.21 on Methods of
Analysis.
7.1 Dry Air—Air used to purge the drying oven should be
Current edition approved April 1, 2011. Published April 2011. Originally
dried to a moisture content of 1.9 mg/L or less. (Dew
approved in 1973. Last previous edition approved 2008 as D3173–03(2008). DOI:
point−10°C or less.)Any desiccant or drying method capable
10.1520/D3173-11.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or of achieving this degree of dryness is suitable.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
7.2 Desiccants—Materials suitable for use in the desiccator
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. may be chosen from the following:
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