ASTM C737-08
(Specification)Standard Specification for Limestone for Dusting of Coal Mines
Standard Specification for Limestone for Dusting of Coal Mines
ABSTRACT
This specification covers limestone suitable for use as dust in coal mines to prevent coal dust explosions. The limestone shall conform to the chemical composition requirements prescribed. The chemical analysis and the particle size analysis of the limestone shall be conducted.
SCOPE
1.1 This specification covers limestone suitable for use as dust in coal mines to prevent coal dust explosions.
Note 1—Limestone can serve as a source of incombustible material in coal mine operations. Limestone is dusted onto coal exposures in sufficient amount so that not less than 65 % of all loose dust shall be limestone incombustible material. In return air courses the concentration of incombustible materials should be not less than 80 % of the total dust (MSHA 30 CFR 75.403). With such a concentration of limestone incombustible material, dust explosions cannot initiate or be propagated from nearby gas explosions. The limestone must be substantially dry in order to dust satisfactorily.
1.2 This standard does not purport to address all of the safety concerns, if any, 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.
1.3 The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in this standard.
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Designation: C737 −08
StandardSpecification for
1
Limestone for Dusting of Coal Mines
This standard is issued under the fixed designation C737; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope* C110 Test Methods for Physical Testing of Quicklime,
Hydrated Lime, and Limestone
1.1 This specification covers limestone suitable for use as
dust in coal mines to prevent coal dust explosions.
3. Chemical Composition
NOTE 1—Limestone can serve as a source of incombustible material in
3.1 Limestone shall conform to the following as to chemical
coal mine operations. Limestone is dusted onto coal exposures in
composition:
sufficient amount so that not less than 65 % of all loose dust shall be
limestone incombustible material. In return air courses the concentration
Moisture (at point of manufacture), max, % 0.5
of incombustible materials should be not less than 80 % of the total dust
Silica, free and combined, max, % 4.0
(MSHA 30 CFR 75.403). With such a concentration of limestone
incombustible material, dust explosions cannot initiate or be propagated
4. Physical Properties
from nearby gas explosions. The limestone must be substantially dry in
order to dust satisfactorily.
4.1 Limestone for this application shall have the following
particle size:
1.2 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
Passing a No. 20 (850-µm) sieve, min, % 100
Passing a No. 200 (75-µm) sieve, min, % 70
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
5. Test Methods
bility of regulatory limitations prior to use.
1.3 The values stated in inch-pound units are to be regarded 5.1 Chemical Analysis—The chemical analysis of the lime-
as standard. No other units of measurement are included in this stoneshallbeconductedinaccordancewithTestMethodsC25.
standard.
5.2 Particle Size—The sieve analysis of limestone shall be
conducted in accordance with Test Methods C110.
2. Referenced Documents
2
2.1 ASTM Standards:
6. General Requirements
C25 Test Methods for Chemical Analysis of Limestone,
6.1 Either high calcium or dolomitic limestone may be
Quicklime, and Hydrated Lime
furnished for this application.
C50 Practice for Sampling, Sample Preparation, Packaging,
and Marking of Lime and Limestone Products
7. Sampling, Inspection, etc.
7.1 The sampling, inspection, rejection, retesti
...
This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:C737 – 02 Designation: C 737 – 08
Standard Specification for
1
Limestone for Dusting of Coal Mines
This standard is issued under the fixed designation C 737; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1This specification covers limestone suitable for use as dust in coal mines to prevent coal dust explosions. *
1.1 This specification covers limestone suitable for use as dust in coal mines to prevent coal dust explosions.
NOTE1—In coal mine operations, limestone is dusted onto coal exposures in sufficient amount so that not less than 65% of all loose dust shall be
limestone. With such a concentration of limestone, explosions cannot initiate or be propagated from nearby gas explosions. The limestone must be
substantially dry in order to dust satisfactorily. 1—Limestone can serve as a source of incombustible material in coal mine operations. Limestone is
dusted onto coal exposures in sufficient amount so that not less than 65 % of all loose dust shall be limestone incombustible material. In return air courses
the concentration of incombustible materials should be not less than 80 % of the total dust (MSHA 30 CFR 75.403). With such a concentration of
limestone incombustible material, dust explosions cannot initiate or be propagated from nearby gas explosions. The limestone must be substantially dry
in order to dust satisfactorily.
1.2 This standard does not purport to address all of the safety concerns, if any, 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.
1.3 The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in this
standard.
2. Referenced Documents
2
2.1 ASTM Standards:
C25 Test Methods for Chemical Analysis of Limestone, Quicklime, and Hydrated Lime
C50 MethodsPractice for Sampling, Inspection, Sample Preparation, Packaging, and Marking of Lime and Limestone Products
C110 Test Methods for Physical Testing of Quicklime, Hydrated Lime, and Limestone
3. Chemical Composition
3.1 Limestone shall conform to the following as to chemical composition:
Moisture (at point of manufacture), max, % 0.5
Silica, free and combined, max, % 4.0
4. Physical Properties
4.1 Limestone for this application shall have the following particle size:
Passing a No. 20 (850-µm) sieve, min, % 100
Passing a No. 200 (75-µm) sieve, min, % 70
5. Test Methods
5.1 Chemical Analysis—The ch
...
This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:C737 – 02 Designation: C 737 – 08
Standard Specification for
1
Limestone for Dusting of Coal Mines
This standard is issued under the fixed designation C 737; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1This specification covers limestone suitable for use as dust in coal mines to prevent coal dust explosions. *
1.1 This specification covers limestone suitable for use as dust in coal mines to prevent coal dust explosions.
NOTE1—In coal mine operations, limestone is dusted onto coal exposures in sufficient amount so that not less than 65% of all loose dust shall be
limestone. With such a concentration of limestone, explosions cannot initiate or be propagated from nearby gas explosions. The limestone must be
substantially dry in order to dust satisfactorily. 1—Limestone can serve as a source of incombustible material in coal mine operations. Limestone is
dusted onto coal exposures in sufficient amount so that not less than 65 % of all loose dust shall be limestone incombustible material. In return air courses
the concentration of incombustible materials should be not less than 80 % of the total dust (MSHA 30 CFR 75.403). With such a concentration of
limestone incombustible material, dust explosions cannot initiate or be propagated from nearby gas explosions. The limestone must be substantially dry
in order to dust satisfactorily.
1.2 This standard does not purport to address all of the safety concerns, if any, 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.
1.3 The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in this
standard.
2. Referenced Documents
2
2.1 ASTM Standards:
C25 Test Methods for Chemical Analysis of Limestone, Quicklime, and Hydrated Lime
C50 MethodsPractice for Sampling, Inspection, Sample Preparation, Packaging, and Marking of Lime and Limestone Products
C110 Test Methods for Physical Testing of Quicklime, Hydrated Lime, and Limestone
3. Chemical Composition
3.1 Limestone shall conform to the following as to chemical composition:
Moisture (at point of manufacture), max, % 0.5
Silica, free and combined, max, % 4.0
4. Physical Properties
4.1 Limestone for this application shall have the following particle size:
Passing a No. 20 (850-µm) sieve, min, % 100
Passing a No. 200 (75-µm) sieve, min, % 70
5. Test Methods
5.1 Chemical Analysis—The ch
...
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