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Volume 15
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10.3390/min15020179
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Article

Effect of Different Crushing Methods on Chalcopyrite Liberation and Heavy Media Preconcentration

by
Jian Xu
1,2,3,
Hailiang Wang
1,2,3,
Chunqing Gao
1,2,3,
Lin Zhang
1,2,3,
Hanxu Yang
1,2,3,
Mingyu Sai
1,2,3,
Jun Hu
1,2,3,
Qiuju Huang
1,2,3 and
Hongzhen Luo
1,2,3,*
1
State Key Laboratory of Safety and Health for Metal Mines, Maanshan 243000, China
2
Sinosteel Maanshan General Institute of Mining Research Co., Ltd., Maanshan 243000, China
3
National Engineering Research Center of Huawei High Efficiency Cyclic Utilization of Metal Mineral Resources Co., Ltd., Maanshan 243000, China
*
Author to whom correspondence should be addressed.
Minerals 2025, 15(2), 179; https://doi.org/10.3390/min15020179
Submission received: 30 December 2024 / Revised: 12 February 2025 / Accepted: 13 February 2025 / Published: 14 February 2025
(This article belongs to the Special Issue Recent Advances in Ore Comminution)
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Abstract

In order to find a short, economically feasible process for chalcopyrite preconcentration and to provide a reference for the preconcentration of similar copper sulfide ores, the particle size characteristics of the crushed products from a high-pressure grinding roller (HPGR) and jaw crusher (JC) were analyzed, as well as the liberation degree and fracture characteristics of the chalcopyrite. The float–sink test (FST) was carried out on the crushed products, and the effects of the two crushing methods on the FSTs of the crushed products were compared. The research results show that at the same crushing fineness, the chalcopyrite liberation in HPGR products can be enhanced by 14%~18% compared with the JC. The single-particle crushing of the JC tends to produce intergranular fracturing of chalcopyrite, while the lamination crushing of the HPGR produces more transgranular fracturing of chalcopyrite; the chalcopyrite in the −5 + 0.5 mm size fraction mainly produces intergranular fracturing, and the chalcopyrite in the −0.5 mm size fraction mainly produces transgranular fracturing. The FST results show that heavy media preconcentration was suitable for chalcopyrite, and, in the optimal conditions of a size fraction of −3 + 0.5 mm and separation density of 2.55 g/cm3, the grade and distribution rate of Cu in the sinks obtained by HPGR-FST were 0.35% and 89.86%, respectively, and the floats yield was 24.76%, with a better enrichment of sinks and higher floats yields, which was better when compared with that of the JC-FST.
Keywords: chalcopyrite; high-pressure grinding roller; jaw crusher; liberation; fracture; heavy media preconcentration chalcopyrite; high-pressure grinding roller; jaw crusher; liberation; fracture; heavy media preconcentration

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MDPI and ACS Style

Xu, J.; Wang, H.; Gao, C.; Zhang, L.; Yang, H.; Sai, M.; Hu, J.; Huang, Q.; Luo, H. Effect of Different Crushing Methods on Chalcopyrite Liberation and Heavy Media Preconcentration. Minerals 2025, 15, 179. https://doi.org/10.3390/min15020179

AMA Style

Xu J, Wang H, Gao C, Zhang L, Yang H, Sai M, Hu J, Huang Q, Luo H. Effect of Different Crushing Methods on Chalcopyrite Liberation and Heavy Media Preconcentration. Minerals. 2025; 15(2):179. https://doi.org/10.3390/min15020179

Chicago/Turabian Style

Xu, Jian, Hailiang Wang, Chunqing Gao, Lin Zhang, Hanxu Yang, Mingyu Sai, Jun Hu, Qiuju Huang, and Hongzhen Luo. 2025. "Effect of Different Crushing Methods on Chalcopyrite Liberation and Heavy Media Preconcentration" Minerals 15, no. 2: 179. https://doi.org/10.3390/min15020179

APA Style

Xu, J., Wang, H., Gao, C., Zhang, L., Yang, H., Sai, M., Hu, J., Huang, Q., & Luo, H. (2025). Effect of Different Crushing Methods on Chalcopyrite Liberation and Heavy Media Preconcentration. Minerals, 15(2), 179. https://doi.org/10.3390/min15020179

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