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ASTM D5341-99(2004)

Historical Reaffirmation

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

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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 SI units are to be regarded as the standard. The values given in parentheses are for information only.

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.


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.

SDO ASTM: ASTM International
Document Number D5341
Publication Date April 1, 2004
Language en - English
Page Count 4
Revision Level 99(2004)
Supercedes
Committee D05.15
Publish Date Document Id Type View
May 1, 2010 D5341-99R10E01 Revision
Sept. 10, 1999 D5341-99 Revision
May 1, 2010 D5341-99R10 Reaffirmation
April 1, 2004 D5341-99R04 Reaffirmation