ASTM D1412-99

Standard Test Method for Equilibrium Moisture of Coal at 96 to 97 Percent Relative Humidity and 30&#176C

SCOPE
1.1 This test method  covers determination of the equilibrium moisture of coal in an atmosphere over a saturated solution of potassium sulfate at 30°C.  
1.2 This standard may involve hazardous materials, operations, and equipment. This standard does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.>

General Information

• Status: Historical
• Publication Date: 09-Sep-1999
• ICS: 73.040 - Coals
• Technical Committee: D05 - Coal and Coke
• Drafting Committee: D05.21 - Methods of Analysis

Relations

• Replaced By: ASTM D1412-02 - Standard Test Method for Equilibrium Moisture of Coal at 96 to 97 Percent Relative Humidity and 30&#176C
• Effective Date: 10-Apr-2002

Standards Content (Sample)

Designation: D 1412 – 99
Standard Test Method for
Equilibrium Moisture of Coal at 96 to 97 Percent Relative
1
Humidity and 30°C
This standard is issued under the fixed designation D 1412; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope moisture or coal that may have lost some moisture. It may be
2 used for estimating the surface, or extraneous moisture of wet
1.1 This test method covers determination of the equilib-
coal, such moisture being the difference between the total
rium moisture of coal in an atmosphere over a saturated
moisture as determined by Test Method D 3302 and the
solution of potassium sulfate at 30°C.
equilibrium moisture.
1.2 This standard does not purport to address all of the
3.2 When samples are collected in conformity with Classi-
safety concerns, if any, associated with its use. It is the
fication D 388, the equilibrium moisture is considered to be
responsibility of the user of this standard to establish appro-
equal to bed moisture with the exception of some low rank
priate safety and health practices and determine the applica-
coals that yield equilibrium moisture values below bed mois-
bility of regulatory limitations prior to use.
ture.
2. Referenced Documents
4. Apparatus
2.1 ASTM Standards:
3
4.1 Water Bath or Insulated Air Cabinet—The bath or
D 121 Terminology of Coal and Coke
3
cabinet shall be of sufficient size to accommodate several
D 388 Classification of Coals by Rank
3
vacuum-type desiccators, and shall be provided with a tem-
D 2013 Method of Preparing Coal Samples for Analysis
perature regulator to maintain a uniform temperature of 30.0 6
D 2234 Test Methods for Collection of a Gross Sample of
3
0.2°C.
Coal
4.2 Moisture Oven—The oven shall be so constructed as to
D 3173 Test Method for Moisture in the Analysis Sample of
3
have a uniform temperature in all parts and a minimum of air
Coal and Coke
3 space. It may be of the type shown in the Apparatus section of
D 3302 Test Method for Total Moisture in Coal
Test Method D 3173. Provision shall be made for renewing the
D 4596 Practice for Collection of Channel Samples of Coal
3 air (or, if desired, dry oxygen-free nitrogen for subbituminous
in a Mine
and lignitic coals) in the oven at the rate of two times per
3. Significance and Use minute, with the air dried by passing it through H SO (sp gr
2 4
1.84).
3.1 This test method affords a means of estimating the bed
4.3 Mechanical Vacuum Pump.
moisture of either coal that is wet and shows visible surface
4.4 Crusher, laboratory, coffee-mill type.
4.5 Sieve, 8-in. (203-mm) diameter, with 1.18-mm (No. 16)
1
This test method is under the jurisdiction of ASTM Committee D-5 on Coal and
openings.
Coke and is the direct responsibility of Subcommittee D05.21 on Methods of
4.6 Shaking Machine.
Analysis.
Current edition approved Sept. 10, 1999. Published December 1999. Originally
4.7 Desiccator—Small vacuum-type desiccator, 160 mm in
published as D 1412 – 56 T. Last previous edition D 1412 – 93 (1997).
diameter (see Fig. 1).
2
For information concerning the experimental work on which this test method is
4.8 Weighing Bottles, glass, low-form, flat-bottom, cylindri-
based, see the following papers:
cal, 70 mm in diameter, with well-fitting covers.
Stansfield, Edgar and Gilbart, K. C., “Moisture Determination for Coal Classi-
fication,” Transactions, American Institute of Mining and Metallurgical Engineers,
4.9 Filter Pump, aspirator.
Coal Division, TAMCA, Vol 101, 1932, pp. 125–43.
1
4.10 Buchner-Type Funnel, approximately 2 ⁄2 in. (64 mm)
Rees, O. W., Reed, F. H., and Land, G. W., “A Study of the Equilibration Method
in diameter.
of Determining Moisture in Coal for Classification by Rank,” Report of Investiga-
tions No. 58, Illinois State Geological Survey, ILGIA, 1939, pp. 34.
Krumin, Peter, “The Determination of Forms of Moisture in Coal,” No. 195, 5. Technical Hazards
Ohio State University, p. 92, 1963.
5.1 In collecting, containing, handling, reducing, and divid-
Kreulen, D. J. W., “The Adsorption Water of Coal,” Chemische en Pharma-
ing the gross moisture sample, all operations must be done
ceutische Techniek (Dordrecht), CHPHA, Vol 7, 1951, pp. 23–24.
Selvig, W. A., and Ode, W. H., “Determination of Moisture-Holding Capacity
expeditiously and in a manner that attempts to preserve the
(Bed Moisture) of Coal for Classification by Rank,” Report of Investigations No.
original sample moisture integrity.
4968, U.S. Bureau of Mines, XMBUA 1953.
3 5.2 If the gross sample is too wet to allow reduction and
Annual Book of ASTM Standards, Vol 05.06.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
D 1412
7.1.3 Divide out the equilibration moist
...