Effect of mineral matter on the reactivity of coke and its replication in a coke analogue

Authors

Raymond Longbottom, University of WollongongFollow
Brian J. Monaghan, University of WollongongFollow
Azrin A. Chowdhury, University of WollongongFollow
Mark H. Reid, University of WollongongFollow
Guangqing Zhang, University of WollongongFollow
Merrick R. Mahoney, University of NewcastleFollow
Kim Hockings, BHP Billiton

RIS ID

109916

Publication Details

Longbottom, R. James., Monaghan, B. Joseph., Chowdhury, A. Akhter., Reid, M. Henry., Zhang, G., Mahoney, M. Russel. & Hockings, K. (2016). Effect of mineral matter on the reactivity of coke and its replication in a coke analogue. ISIJ International, 56 (9), 1553-1558.

Abstract

The reactivity of coke analogues doped with minerals to mimic the mineralogy of specific industrial cokes was compared with the reactivity of the industrial cokes. The reactivity was assessed in a pseudo-CRI type test. This involved reacting the carbonaceous materials (analogue and industrial coke) in CO2 at 1 100°C in a thermos-gravimetric system. In this comparison, the mineral matter added to the coke analogue was prepared from ashing of the industrial cokes. A distinct ranking of reactivity for the industrial cokes was determined to be coke A < coke B < coke C. The high reactivity of coke C was attributed to the high iron content in its ash. The higher reactivity of coke B over coke A was attributed to its higher porosity and lower rank (of the original coal carbon type) of the industrial cokes. The coke analogue replicated the increased reactivity of coke C over cokes A and B, indicating that the coke analogue is able to some extent to replicate the effect of coke mineralogy on coke reactivity in CO2. The use of the coke analogue allowed assessment of the difference in the reactivities of cokes A and B. When porosity and carbon type were fixed by use of the analogue, the reactivities of the analogues of cokes A and B were found to be similar.