The effect of combinations of iron-bearing minerals and quartz on coke reactivity

Authors

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

RIS ID

114029

Publication Details

Longbottom, R. J., Monaghan, B. J., Chowdhury, A. A., Mahoney, M. R., Reid, M. H., Zhang, G. & Hockings, K. (2018). The effect of combinations of iron-bearing minerals and quartz on coke reactivity. Ironmaking and Steelmaking, 45 (8), 685-691.

Abstract

The effect of combinations of iron-bearing minerals and quartz on the reactivity of coke analogues with CO₂ was examined in a TGA. Troilite–quartz, pyrite–quartz and magnetite–troilite binary combinations and the troilite–magnetite–quartz ternary combination were examined. For the troilite–quartz and pyrite–quartz binary combinations the reactivity in general decreased non linearly with increasing Si:Fe ratio. The magnetite–troilite combination had a non-linear effect on the reactivity in that mixes of these two minerals show a higher reactivity than would be expected from a simple proportional mixing approach. Some evidence of sulphur transfer from the troilite to the magnetite was observed. The reactivity of the ternary magnetite–troilite–quartz combination can largely be understood from the trends in the axes. These were largely followed across all compositions, allowing better understanding and prediction of the effect of these minerals on the reactivity of industrial cokes.