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New laboratory tests have been developed to characterise the coke behaviour at high temperature under conditions similar to those encountered in the blast furnace, especially in terms of gasification degree. The CRM Cokarac test characterises the evolution of coke size distribution under mechanical, chemical and thermal stresses during increasing residence time under gasification conditions prevailing in the blast furnace. Two Corus tests characterise the resistance of coke submitted to the actions of liquid iron and slag. A CPM test characterises the strength of coke after a constant weight loss. The validity of these new tests has been demonstrated by comparing the modifications of the coke grain size and microscopic texture resulting from the tests with those undergone by coke in the blast furnace. The latter have been measured by comparing cokes sampled by a tuyere probe with cokes sampled before charging into the blast furnace. Industrial cokes from a wide variety of sources have been tested. Moreover, to highlight the sensitivity of the new tests and their innovative content, cokes differing greatly by their CRI and CSR indices have been produced in the pilot coke oven plant of CPM. The results of the new tests showed only little correlation with the classical coke characterisation indices (I10, I40) and with the standard CRI-CSR indices, which indicates that they really bring new information on coke properties. The applicability of these new tests on a routine basis has been evaluated in order to allow the ironmaking industry to better characterise coke quality.

Additional information

Authors: DANLOY G, CRM, Liège (BE);DESNEUX P, CRM, Liège (BE);FISCHBACH J P, CRM, Liège (BE);NOVILLE J F, CRM, Liège (BE);STEYLS D, CRM, Liège (BE);LECTARD E, ArcelorMittal Research, Plaine Saint-Denis (FR);PIERRET H, ArcelorMittal Research, Plaine Saint-Denis (FR);DELINCHANT J, ArcelorMittal Research, Plaine Saint-Denis (FR);VAN DER VELDEN B, Corus NL, IJmuiden (NL);STUURWOLD J, Corus NL, IJmuiden (NL);JANHSEN U, (TKS), Duisburg (DE);GÜNBATI A Y, (TKS), Duisburg (DE)
Bibliographic Reference: EUR 23748 EN (2009) 125 pp., Euro: 20
Availability: (Catalogue Number: KI-NA-23748-EN-S)
ISBN: ISBN: 978-92-79-11253-9
Record Number: 200910518 / Last updated on: 2009-12-11
Original language: en
Available languages: en
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