Microstructural evolution of metallurgical coke: Evidence from Raman spectroscopy

Gerd Rantitsch, Anrin Bhattacharyya, Ahmat Günbati, Marc-Andre Schulten, Johannes Schenk, Ilse Letofsky-Papst, Jörg Albering

Publikation: Beitrag in einer FachzeitschriftArtikel

Abstract

Raman spectroscopy traces the microstructural evolution of carbonaceous matter (CM) during artificial heating.Thermo-chemical reactivity and strength of blast furnace coke at 1100 °C is dependent on the graphitizationstate of the feed coke. A standard coke reactivity index (CRI) sample is composed of lumps, showing a highmicrostructural variability. The frequency distribution of the D-STA parameter estimated by the “InteractiveFitting of Raman Spectra” (IFORS) software suggests a positive correlation between degree of CM organizationand CRI. Samples from the tuyere region of an operating blast furnace evidence graphitization of CM at temperatureshigher than 1900 °C. IFORS parameters, calibrated by x-ray diffraction-based lattice dimensions andtransmission electron microscopy data constrain a temperature gradient decreasing from the raceway to thedeadman zone. The gradient controls a continuous variation of the petrographic coke texture. As an ap
Originalspracheenglisch
Aufsatznummer103546
FachzeitschriftInternational Journal of Coal Geology
Jahrgang227
DOIs
PublikationsstatusVeröffentlicht - 2020

ASJC Scopus subject areas

  • !!Materials Science(all)

Fields of Expertise

  • Advanced Materials Science

Treatment code (Nähere Zuordnung)

  • Basic - Fundamental (Grundlagenforschung)

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