<abstract xmlns="http://www.w3.org/1999/xhtml"> Several samples of dusts from steel and coke plants (collected mostly with electro filters) were subjected to the investigation of content of mineral phases in their particles. Additionally, sample of bog iron ore and metallurgical slurry was studied. Next, the magnetic susceptibility of all the samples was determined, and investigations of iron-containing phases were performed using transmission Mössbauer spectrometry. The values of mass-specific magnetic susceptibility χ varied in a wide range: from 59 to above 7000 × 10−8 m-3·kg−1. The low values are determined for bog iron ore, metallurgical slurry, and coke dusts. The extremely high χ was obtained for metallurgical dusts. The Mössbauer spectra and X-ray diffraction patterns point to the presence of the following phases containing iron: hematite and oxidized magnetite (in coke and metallurgical dusts as well as metallurgical slurry), traces of magnetite fine grains fraction (in metallurgical dusts), amorphous glassy silicates with paramagnetic Fe3+ and Fe2+ ions, traces of pyrrhotite (in coke dusts), α-Fe and nonstoichiometric wüstite (in metallurgical slurry), as well as ferrihydrite nanoparticles (in bog iron ore). For individual samples of metallurgical dusts, the relative contributions of Fe2+/3+ ions in octahedral B sites and Fe2+ ions in tetrahedral A sites in magnetite spinel structure differs considerably. </abstract>

Several samples of dusts from steel and coke plants (collected mostly with electro filters) were subjected to the investigation of content of mineral phases in their particles. Additionally, sample of bog iron ore and metallurgical slurry was studied. Next, the magnetic susceptibility of all the samples was determined, and investigations of iron-containing phases were performed using transmission Mössbauer spectrometry. The values of mass-specific magnetic susceptibility χ varied in a wide range: from 59 to above 7000 × 10−8 m-3·kg−1. The low values are determined for bog iron ore, metallurgical slurry, and coke dusts. The extremely high χ was obtained for metallurgical dusts. The Mössbauer spectra and X-ray diffraction patterns point to the presence of the following phases containing iron: hematite and oxidized magnetite (in coke and metallurgical dusts as well as metallurgical slurry), traces of magnetite fine grains fraction (in metallurgical dusts), amorphous glassy silicates with paramagnetic Fe3+ and Fe2+ ions, traces of pyrrhotite (in coke dusts), α-Fe and nonstoichiometric wüstite (in metallurgical slurry), as well as ferrihydrite nanoparticles (in bog iron ore). For individual samples of metallurgical dusts, the relative contributions of Fe2+/3+ ions in octahedral B sites and Fe2+ ions in tetrahedral A sites in magnetite spinel structure differs considerably.

Iron-containing phases in metallurgical and coke dusts as well as in bog iron ore

Nukleonika

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Several samples of dusts from steel and coke plants (collected mostly with electro filters) were subjected to the investigation of content of mineral phases in...

Iron-containing phases in metallurgical and coke dusts as well as in bog iron ore

Publié en ligne: 09 juin 2017

Pages: 187 - 195

Reçu: 25 juin 2016

Accepté: 03 oct. 2016

DOI: https://doi.org/10.1515/nuka-2017-0029

Mots clés
metallurgical dusts, coke dusts, bog ore, phase analysis, Mössbauer spectrometry, magnetic susceptibility

© by Tadeusz Szumiata

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Iron-containing phases in metallurgical and coke dusts as well as in bog iron ore

Publié en ligne: 09 juin 2017

Pages: 187 - 195

Reçu: 25 juin 2016

Accepté: 03 oct. 2016

DOI: https://doi.org/10.1515/nuka-2017-0029

Mots clésmetallurgical dusts, coke dusts, bog ore, phase analysis, Mössbauer spectrometry, magnetic susceptibility

© by Tadeusz Szumiata

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Mots clés
metallurgical dusts, coke dusts, bog ore, phase analysis, Mössbauer spectrometry, magnetic susceptibility