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During the low temperature reduction of iron ore burden in the blast furnace (BF), disintegration proceeds due to crack formation caused by volume expansion through the reduction of hematite to magnetite.1) The iron burden also receives a series of impacts during descending in the BF.2) In contrast, the standard method, e.g. ISO 4694-2, for the evaluation of the reduction disintegration index (RDI) is consisted of low temperature reduction with a constant gas composition at a constant temperature followed by a cold strength test after cooling. Hence, there seems to be a significant difference between above two conditions. From such viewpoints, we applied alternative tests with the addition of impacts and/or loads to the samples during In-situ Evaluation Method for Crack Generation and Propagation Behaviors of Iron Ore Burden during Low Temperature Reduction by Applying Acoustic Emission Method

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&lt;i&gt;In-situ&lt;/i&gt; Evaluation Method for Crack Generation and Propagation Behaviors of Iron Ore Burden during Low Temperature Reduction by Applying Acoustic Emission Method