Globally, roughly 1.75 million tons of waelz slag per year are produced from 35 waelz kilns. The increasing costs for landfilling, changing environmental concerns and a focus on sustainable production foster an investigation of this by-product to investigate if at least parts of it can be used as a raw material. Waelz slags are highly variable in the shape of the phases within the different samples, ranging from euhedral to spherical habitus. The variation in phase chemistry within the different samples is marginal. The main phases of `normal` waelz slag are ferrite solid solutions with different endmembers in the Zn-Mn-Mg-Ca system, followed by belite (C2S), wustite and metallic iron. Zn-sulphide, chromium spinel, alite (C3S), aluminate and zinc oxide can be considered as minor or accessory phases. The differences in the feed material (stainless steel filter dust) correlate with the increased amount of Ni (up to 3 m/m%) in metallic iron phases. Waelz slag that was treated with compressed oxygen and subsequently cooled in air shows differences in phase habitus (mostly euhedral) and phase chemistry (absence of wustite and metallic iron). The characterization of waelz slags involves several analytical steps. Among these, reflected light microscopy and SEM phase identification are regarded as obligatory.
| Published in | International Journal of Mineral Processing and Extractive Metallurgy (Volume 7, Issue 2) |
| DOI | 10.11648/j.ijmpem.20220702.13 |
| Page(s) | 50-60 |
| Creative Commons |
This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited. |
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Copyright © The Author(s), 2022. Published by Science Publishing Group |
Waelz Slag, Mineralogy, Chemical Quantification
| [1] | J. Antrekowitsch, S. Steinlechner, A. Unger, G. Rösler, C. Pichler, R. Rumpold. Zinc and Residue Recycling. in: Worrell, E., M. A. Reuter: Handbook of recycling, Elsevier, Amsterdam, 2014. |
| [2] | S. Steinlechner. Amelioration and market strategies for zinc oxide with focus on secondary sources. Dissertation, 2013, University of Leoben, Austria. |
| [3] | H. Tamura, K. Goto, T. Yotsuyanagi, M. Nagayama. Spectrophotometric determination of iron(II) with 1,10-phenanthroline in the presence of large amounts of iron(III). Talanta, Volume 21, Issue 4, 1974, Pages 314-318. |
| [4] | T. Meisel, N. Schöner, V. Paliulionyte, E. Kahr. Determination of rare earth elements, Y, Th, Zr, Hf, Nb and Ta in geological reference materials G-2, G-3, SCo-1 and WGB-1 by sodium peroxide sintering and inductively coupled plasma-mass spectrometry. Geostandards Newsletter, 26, (2002), 53-61. |
| [5] | Muan, E. F. Osborne. Phase equilibria among oxides in steelmaking. New York: Addison-Wesly 1965; In Lea´s Chemistry of Cement and Concrete 2019. |
| [6] | H. F. W. Taylor. Cement chemistry 2nd ed. (1997) Academic Press, Thomas Telford London. |
| [7] | L. Kacimi, A. Simon-Masseron, S. Salem, A. Ghomari, Z. Derriche. Synthesis of belite cement clinker of high hydraulic reactivity. Cement and Concrete Research, Vol 39 (2009), Issue 7, pp 559-565. |
| [8] | I. Maki, S. Ito, T. Tanioka, Y. Ohno, K. Fukuda. Clinker grindability and textures of alite and belite. Cement and Concrete Research, Volume 23, Issue 5, (1993), pp 1078-1084. |
| [9] | L. Hjorth, K.-G. Laurén. Belite in portland cement. Cement and Concrete Research, Volume 1, Issue 1 (1971), pp 27-40. |
| [10] | P. Onuk, F. Melcher. Mineralogische und chemische Charakterisierung vonWälzrohr-Schlacken: wichtige Untersuchungsergebnisseund Erarbeitung eines Charakterisierungsablaufs. Berg und Hüttenmaenisches Monatsheft, 165 (2020), pp 578-586. |
APA Style
Peter Onuk, Frank Melcher. (2022). Mineralogical and Chemical Quantification of Waelz Slag. International Journal of Mineral Processing and Extractive Metallurgy, 7(2), 50-60. https://doi.org/10.11648/j.ijmpem.20220702.13
ACS Style
Peter Onuk; Frank Melcher. Mineralogical and Chemical Quantification of Waelz Slag. Int. J. Miner. Process. Extr. Metall. 2022, 7(2), 50-60. doi: 10.11648/j.ijmpem.20220702.13
AMA Style
Peter Onuk, Frank Melcher. Mineralogical and Chemical Quantification of Waelz Slag. Int J Miner Process Extr Metall. 2022;7(2):50-60. doi: 10.11648/j.ijmpem.20220702.13
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Download@article{10.11648/j.ijmpem.20220702.13,
author = {Peter Onuk and Frank Melcher},
title = {Mineralogical and Chemical Quantification of Waelz Slag},
journal = {International Journal of Mineral Processing and Extractive Metallurgy},
volume = {7},
number = {2},
pages = {50-60},
doi = {10.11648/j.ijmpem.20220702.13},
url = {https://doi.org/10.11648/j.ijmpem.20220702.13},
eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ijmpem.20220702.13},
abstract = {Globally, roughly 1.75 million tons of waelz slag per year are produced from 35 waelz kilns. The increasing costs for landfilling, changing environmental concerns and a focus on sustainable production foster an investigation of this by-product to investigate if at least parts of it can be used as a raw material. Waelz slags are highly variable in the shape of the phases within the different samples, ranging from euhedral to spherical habitus. The variation in phase chemistry within the different samples is marginal. The main phases of `normal` waelz slag are ferrite solid solutions with different endmembers in the Zn-Mn-Mg-Ca system, followed by belite (C2S), wustite and metallic iron. Zn-sulphide, chromium spinel, alite (C3S), aluminate and zinc oxide can be considered as minor or accessory phases. The differences in the feed material (stainless steel filter dust) correlate with the increased amount of Ni (up to 3 m/m%) in metallic iron phases. Waelz slag that was treated with compressed oxygen and subsequently cooled in air shows differences in phase habitus (mostly euhedral) and phase chemistry (absence of wustite and metallic iron). The characterization of waelz slags involves several analytical steps. Among these, reflected light microscopy and SEM phase identification are regarded as obligatory.},
year = {2022}
}
TY - JOUR T1 - Mineralogical and Chemical Quantification of Waelz Slag AU - Peter Onuk AU - Frank Melcher Y1 - 2022/06/09 PY - 2022 N1 - https://doi.org/10.11648/j.ijmpem.20220702.13 DO - 10.11648/j.ijmpem.20220702.13 T2 - International Journal of Mineral Processing and Extractive Metallurgy JF - International Journal of Mineral Processing and Extractive Metallurgy JO - International Journal of Mineral Processing and Extractive Metallurgy SP - 50 EP - 60 PB - Science Publishing Group SN - 2575-1859 UR - https://doi.org/10.11648/j.ijmpem.20220702.13 AB - Globally, roughly 1.75 million tons of waelz slag per year are produced from 35 waelz kilns. The increasing costs for landfilling, changing environmental concerns and a focus on sustainable production foster an investigation of this by-product to investigate if at least parts of it can be used as a raw material. Waelz slags are highly variable in the shape of the phases within the different samples, ranging from euhedral to spherical habitus. The variation in phase chemistry within the different samples is marginal. The main phases of `normal` waelz slag are ferrite solid solutions with different endmembers in the Zn-Mn-Mg-Ca system, followed by belite (C2S), wustite and metallic iron. Zn-sulphide, chromium spinel, alite (C3S), aluminate and zinc oxide can be considered as minor or accessory phases. The differences in the feed material (stainless steel filter dust) correlate with the increased amount of Ni (up to 3 m/m%) in metallic iron phases. Waelz slag that was treated with compressed oxygen and subsequently cooled in air shows differences in phase habitus (mostly euhedral) and phase chemistry (absence of wustite and metallic iron). The characterization of waelz slags involves several analytical steps. Among these, reflected light microscopy and SEM phase identification are regarded as obligatory. VL - 7 IS - 2 ER -
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