7TH EUROPEAN COKE AND IRONMAKING CONGRESS - ECIC 2016

Coke cold strength is typically measured using standardised coke strength indices (ASTM, IRSID and JIS). When all coke cold strength tests are performed at full scale, collective weight of 45 kg of product coke is required.However, pilot or research at bench scale cokingmay not result in sufficient coke yield for standardised testing. In these cases, an I600 test, which is equivalent to the CSR I-drum test without pre-reaction by CO2,and utilises only 400 g of coke for duplicate test, could be used. As part of the pilot scale coking program completed for BHP Billiton at Commonwealth Scientific and Industrial Organisation (CSIRO), the I600 test was introduced to supplement standard coke testing practice.The aim of this work was to determine the relationships between the results of I600 test and commonly used coke strength indices. The main conclusion of this study was that I600correlated best with indices which had most similar test conditions (particle size, drum revolutions). Moreover, significant improvement of the CSR prediction equation using CRI by incorporating the I600 index was found. In addition influence of coal preparation and coking conditions on I600, CSR and CRI relationship was also evaluated and the findings were reported.