ASTM D5341/D5341M-17a

Standard Test Method for Measuring Coke Reactivity Index (CRI) and Coke Strength After Reaction (CSR)

SIGNIFICANCE AND USE
4.1 When coke lumps descend in the blast furnace, they are subjected to reaction with countercurrent CO2 and to abrasion as they rub together and against the walls of the furnace. These concurrent processes physically weaken and chemically react with the coke lumps, producing an excess of fines that can decrease burden permeability and result in increased coke rates and lost hot metal production. This test method is designed to measure indirectly this behavior of coke in the blast furnace.
SCOPE
1.1 This test method, patterned after the Nippon Steel test procedure, describes the equipment and techniques used for determining lump coke reactivity in carbon dioxide (CO2) gas at elevated temperatures and its strength after reaction in CO2 gas by tumbling in a cylindrical chamber referred to as an I-tester.  
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.  
1.3 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Historical
• Publication Date: 31-Oct-2017
• ICS: 75.160.10 - Solid fuels
• Technical Committee: D05 - Coal and Coke
• Drafting Committee: D05.15 - Metallurgical Properties of Coal and Coke

Relations

• Replaces: ASTM D5341/D5341M-17 - Standard Test Method for Measuring Coke Reactivity Index (CRI) and Coke Strength After Reaction (CSR)
• Effective Date: 01-Nov-2017
• Replaced By: ASTM D5341/D5341M-18 - Standard Test Method for Measuring Coke Reactivity Index (CRI) and Coke Strength After Reaction (CSR)
• Effective Date: 01-Dec-2018

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D5341/D5341M − 17a
Standard Test Method for
Measuring Coke Reactivity Index (CRI) and Coke Strength
1
After Reaction (CSR)
This standard is issued under the fixed designation D5341/D5341M; 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 Determine the Precision of a Test Method
2.2 British Carbonization Research Association Report:
1.1 This test method, patterned after the Nippon Steel test
Carbonization Research Report 91, “The Evaluation of the
procedure, describes the equipment and techniques used for
Nippon Steel Corporation Reactivity and Post-Reaction-
determining lump coke reactivity in carbon dioxide (CO ) gas
2
3
Strength Test for Coke.”
at elevated temperatures and its strength after reaction in CO
2
gas by tumbling in a cylindrical chamber referred to as an
3. Summary of Test Method
I-tester.
3.1 A sample of dried coke of designated origin and size is
1.2 The values stated in either SI units or inch-pound units
reacted with CO gas in a retort at a specified elevated
2
are to be regarded separately as standard. The values stated in
temperature for a specified length of time. Two indices, coke
each system may not be exact equivalents; therefore, each
reactivity index (CRI) and coke strength after reaction (CSR),
system shall be used independently of the other. Combining
are determined using the reacted coke residue. The mass or
values from the two systems may result in non-conformance
weight loss after reaction determines the CRI. The mass or
with the standard.
weight retained after sieving the tumbled reacted coke in a
1.3 This standard does not purport to address all of the
designated number of revolutions over a designated turning
safety concerns, if any, associated with its use. It is the
rate determines the CSR.
responsibility of the user of this standard to establish appro-
4. Significance and Use
priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use.
4.1 When coke lumps descend in the blast furnace, they are
1.4 This international standard was developed in accor-
subjected to reaction with countercurrent CO and to abrasion
2
dance with internationally recognized principles on standard-
as they rub together and against the walls of the furnace.These
ization established in the Decision on Principles for the
concurrent processes physically weaken and chemically react
Development of International Standards, Guides and Recom-
with the coke lumps, producing an excess of fines that can
mendations issued by the World Trade Organization Technical
decrease burden permeability and result in increased coke rates
Barriers to Trade (TBT) Committee.
and lost hot metal production. This test method is designed to
measure indirectly this behavior of coke in the blast furnace.
2. Referenced Documents
2
5. Reagents
2.1 ASTM Standards:
D346 Practice for Collection and Preparation of Coke
5.1 Nitrogen, with purity greater than 99.9 % by volume,
Samples for Laboratory Analysis
dryandwithtotaloxygenandcarbondioxideconcentrationsof
E11 Specification for Woven Wire Test Sieve Cloth and Test
less than 100 mg/kg.
Sieves
5.2 Carbon dioxide, with purity of greater than 99.5 % by
E691 Practice for Conducting an Interlaboratory Study to
volume,drywithanoxygenconcentrationlessthan100mg/kg.
6. Apparatus
1
This test method is under the jurisdiction of ASTM Committee D05 on Coal
and Coke and is the direct responsibility of Subcommittee D05.15 on Metallurgical
6.1 Electric Furnace (Fig. 1), capable of housing the reac-
Properties of Coal and Coke.
tion vessel assembly containing the coke sample and providing
Current edition approved Nov. 1, 2017. Published November 2017. Originally
a uniform temperature of 1100 °C 6 5 °C in the assembly. The
approved in 1993. Last previous edition approved in 2017 as D5341 – 17. DOI:
position of the coke sample contained in the vessel assembly
10.1520/D5341_D5341M-17A.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on Available from British Carbonization Research Association, Chesterfield,
the ASTM website. Derbyshire, England.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D5341/D5341M − 17a
brationspecification.Flowmetersshallbecalibratedforthegas
being used or the flow rate shall be corrected to ac
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM 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: D5341/D5341M − 17 D5341/D5341M − 17a
Standard Test Method for
Measuring Coke Reactivity Index (CRI) and Coke Strength
1
After Reaction (CSR)
This standard is issued under the fixed designation D5341/D5341M; 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
1.1 This test method, patterned after the Nippon Steel test procedure, describes the equipment and techniques used for
determining lump coke reactivity in carbon dioxide (CO ) gas at elevated temperatures and its strength after reaction in CO gas
2 2
by tumbling in a cylindrical chamber referred to as an I-tester.
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each
system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the
two systems may result in non-conformance with the standard.
1.3 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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
D346 Practice for Collection and Preparation of Coke Samples for Laboratory Analysis
E11 Specification for Woven Wire Test Sieve Cloth and Test Sieves
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
2.2 British Carbonization Research Association Report:
Carbonization Research Report 91, “The Evaluation of the Nippon Steel Corporation Reactivity and Post-Reaction-Strength
3
Test for Coke.”
3. Summary of Test Method
3.1 A sample of dried coke of designated origin and size is reacted with CO gas in a retort at a specified elevated temperature
2
for a specified length of time. Two indices, coke reactivity index (CRI) and coke strength after reaction (CSR), are determined
using the reacted coke residue. The mass or weight loss after reaction determines the CRI. The mass or weight retained after sieving
the tumbled reacted coke in a designated number of revolutions over a designated turning rate determines the CSR.
4. Significance and Use
4.1 When coke lumps descend in the blast furnace, they are subjected to reaction with countercurrent CO and to abrasion as
2
they rub together and against the walls of the furnace. These concurrent processes physically weaken and chemically react with
the coke lumps, producing an excess of fines that can decrease burden permeability and result in increased coke rates and lost hot
metal production. This test method is designed to measure indirectly this behavior of coke in the blast furnace.
1
This test method is under the jurisdiction of ASTM Committee D05 on Coal and Coke and is the direct responsibility of Subcommittee D05.15 on Metallurgical Properties
of Coal and Coke.
Current edition approved Aug. 1, 2017Nov. 1, 2017. Published September 2017November 2017. Originally approved in 1993. Last previous edition approved in 20142017
as D5341 – 14.D5341 – 17. DOI: 10.1520/D5341_D5341M-17.10.1520/D5341_D5341M-17A.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from British Carbonization Research Association, Chesterfield, Derbyshire, England.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D5341/D5341M − 17a
5. Reagents
5.1 Nitrogen, with purity greater than 99.9 % by volume, dry and with total oxygen and carbon dioxide concentrations of less
than 100 mg/kg.
5.2 Carbon dioxide, with purity of greater than 99.5 % by volume, dry with an oxygen concentration les
...