Coke mineral transformations in the experimental blast furnace Article

Kazuberns, K, Gupta, S, Grigore, M et al. (2008). Coke mineral transformations in the experimental blast furnace . ENERGY & FUELS, 22(5), 3407-3419. 10.1021/ef800295d

cited authors

  • Kazuberns, K; Gupta, S; Grigore, M; French, D; Sakurovs, R; Hallin, M; Lindblom, B; Sahajwalla, V

authors

abstract

  • Blast furnace efficiency may be improved by optimizing coke reactivity. Some but not all forms of mineral matter in the coke modify its reactivity, but changes in mineral matter that occur within coke while in the blast furnace have not been fully quantified. To determine changes in mineral matter forms in the blast furnace, coke samples from a dissection study in the LKAB experimental blast furnace (EBF) were characterized using SEM/EDS analysis, EPMA (microprobe), and low-temperature ashing/quantitative XRD analysis. Variations in alkali concentrailon, particularly potassium, dominated the compositional changes. At high concentrations of potassium, the mineral matter was largely potassium-bearing but even more potassium was diffused throughout the coke and not associated with mineral matter. There was little difference in potassium concentration between the core and surface of the coke pieces, suggesting that potassium diffused rapidly through the whole coke. Iron, calcium, silicon, and aluminum concentrations were relatively constant in comparison, although the mineralogy of all elements changed significantly with changing temperature. © 2008 American Chemical Society.

publication date

  • September 1, 2008

published in

Digital Object Identifier (DOI)

start page

  • 3407

end page

  • 3419

volume

  • 22

issue

  • 5