Influences of Materials Segregation on Feeding Conditions and Performance of HPGR Mill
Izadi-Yazdan Abadi, Mohsen; Amiri, Seyed Hamzeh; Zare, Saeid; Luukkanen, Saija (2025-04-25)
Springer Publishing Company
25.04.2025
Izadi-Yazdan Abadi, M., Amiri, S., Zare, S. et al. Influences of Materials Segregation on Feeding Conditions and Performance of HPGR Mill. Mining, Metallurgy & Exploration (2025). https://doi.org/10.1007/s42461-025-01216-1.
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https://creativecommons.org/licenses/by/4.0/
© The Author(s) 2025. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
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Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:oulu-202504302998
https://urn.fi/URN:NBN:fi:oulu-202504302998
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Abstract
HPGR (high-pressure grinding rolls) is widely used as a pre-grinding option in iron ore beneficiation plants. During operation, the wear at the center areas of the rolls is more intense than the edge areas. In this research, the wear pattern on roll surfaces of HPGR in a case study plant was investigated which operates in a close circuit with a wet double-deck vibrating screen. After plant audits, collecting reliable data, and efficient evaluation, it was found that the wear pattern is asymmetric, and the gap between rolls would not be properly adjustable. The reason for the asymmetrical wear was the segregation occurrence in the HPGR feeding chute originating from the non-uniform distribution of HPGR’s feed on the belt conveyor. The results showed that segregation in the feeding bin happens when the bin level is lower than 70%, and it was completely obvious for levels lower than 40%. Also, the non-uniform distribution of HPGR’s feed on the belt conveyor can be decreased by implementing modifications on the connection chute of screen recycle and belt conveyor of HPGR feed.
HPGR (high-pressure grinding rolls) is widely used as a pre-grinding option in iron ore beneficiation plants. During operation, the wear at the center areas of the rolls is more intense than the edge areas. In this research, the wear pattern on roll surfaces of HPGR in a case study plant was investigated which operates in a close circuit with a wet double-deck vibrating screen. After plant audits, collecting reliable data, and efficient evaluation, it was found that the wear pattern is asymmetric, and the gap between rolls would not be properly adjustable. The reason for the asymmetrical wear was the segregation occurrence in the HPGR feeding chute originating from the non-uniform distribution of HPGR’s feed on the belt conveyor. The results showed that segregation in the feeding bin happens when the bin level is lower than 70%, and it was completely obvious for levels lower than 40%. Also, the non-uniform distribution of HPGR’s feed on the belt conveyor can be decreased by implementing modifications on the connection chute of screen recycle and belt conveyor of HPGR feed.
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