Coke. Determination of coke reactivity index (CRI) and coke strength after reaction (CSR)1 Scope This document specifies the equipment and techniques used for determining lump coke (nominal top size >20 mm) reactivity in carbon dioxide gas at elevated temperatures and its strength after reaction in carbon dioxide gas by tumbling in a cylindrical chamber. Main application is the testing of coke to be used in iron making blast furnaces (CRI~ < 33, CSR~ > 55). This standard can also be applied to other coke types (e. g. foundry coke), but

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