№83-32
Determination of technological properties of metal-containing waste as raw material for complex processing
V. Soroka1, https://orcid.org/0009-0008-1344-3923
V. Shutov1 https://orcid.org/0000-0002-9318-2434
1Dnipro University of Technology, Dnipro, Ukraine
Coll.res.pap.nat.min.univ. 2025, 83:365–373
Full text (PDF)
https://doi.org/10.33271/crpnmu/83.365
ABSTRACT
Purpose. Determine the technological properties of sludge and justify its use as secondary raw material for complex processing with return to the production cycle.
Research methodology. Тen samples of sludge were selected for the study, differing in terms of storage time and conditions. The moisture content of the samples was determined. The granulometric composition of the sludge was studied using a standard set of sieves in accordance with the requirements of the international standard ISO 3310-1. Magnetic separation of sludge samples was carried out on a drum NdFeB separator with a magnetic field of 0.35 T and a laboratory roller separator 138T.
Research results. It has been established that secondary material resources such as scale require preliminary preparation by drying for further processing and are characterized by a heterogeneous granulometric composition with a predominance of fine and medium-sized fractions, which is a favorable indicator for further processing. It was established that a magnetic field of 0.1-0.2 T can remove up to 50% of magnetic particles from the initial sludge, and a magnetic field of 0.2-0.4 T can remove up to 45%. The highest yield of magnetic product is observed in large fractions. A technological scheme has been developed for the use of sludge for further complex processing with the aim of extracting useful components and returning them to the production cycle.
Scientific novelty. The patterns of influence of storage time, moisture content, and granulometric composition of sludge on the efficiency of magnetic component extraction by magnetic fields of varying intensity have been established.
Practical significance. The data obtained can be used in the development of a comprehensive technology for processing metal-containing waste from steel rolling mills, which in turn will increase the level of waste utilization.
Keywords: sludge, secondary material resource, moisture content, comprehensive processing, magnetic separation, processing technologies.
References
1. World Steel Association (2025). World Steel in Figures 2025.World Steel Association,Brussels. PDF: https://worldsteel.org/wp-content/uploads/World-Steel-in-Figures-2025.pdf
2. ISO/TC 323 – ISO – Jerome Petry. ISO 59040 — Circular economy: Product Circularity Data Sheet. UNECE / Digital Product Passport Kick-off Meeting materials, 25 Feb 2025. (Online). Available at: https://unece.org/sites/default/files/2025-02/ISO%20TC323%20-%20ISO%20-%20Jerome%20Petry.pd
3. Xie, S., Hu, Z., Lu, D., & Zhao, Y. (2022). Dry Permanent Magnetic Separator: Present Status and Future Prospects. Minerals, 12(10), 1251. https://doi.org/10.3390/min12101251
4. ISO 3310-1:2016. Test sieves — Technical requirements and testing — Part 1: Test sieves of metal wire cloth. International Organization for Standardization, Geneva.
5. DSTU EN 45501:2017. Metrolohichni aspekty neavtomatychnykh zvazhuvalnykh pryladiv. Natsionalnyi standart Ukrainy. (EN 45501:2015, IDT).
6. Pavlychenko, A., & Paliekhova, L. (2024). Draivery ta bar’iery perekhodu metalurhii Ukrainy do tsyrkuliarnoi ekonomiky. Stale spozhyvannia ta vyrobnytstvo u hlobalnykh lantsiuhakh stvorennia vartosti: monohrafiia, 105–120. https://mk.nmu.org.ua/ua/source/Monograph_Complete_2024%20with%20ISBN.pdf
7. Zong, Q. X., Fu, L. Z., & Bo, L. (2018). Variables and Applications on Dry Magnetic Separator. E3S Web of Conferences, 53, 02019. https://doi.org/10.1051/e3sconf/20185302019
8. Iluțiu-Varvara, D.-A., Tintelecan, M., Aciu, C., & Sas-Boca, I.-M. (2020). Reuse of the Steel Mill Scale for Sustainable Industrial Applications. Proceedings, 63(1), 14. https://doi.org/10.3390/proceedings2020063014
9. Baawuah, E., Kelsey, C., Addai-Mensah, J., & Skinner, W. (2020). Assessing the performance of a novel pneumatic magnetic separator for the beneficiation of magnetite ore. Minerals Engineering, 156, 106483. https://doi.org/10.1016/j.mineng.2020.106483
date of first submission of the article to the publication – 10/01/2025
date of acceptance of the article for publication after review – 11/02/2025
date of publication – 12/29/2025