Effect of Crushing Modes on Grinding Performance of Lean Hematite Iron Ore from Qidashan

CAO Jincheng; HAN Yuexin; LIU lei; CAO Fei

doi:10.13779/j.cnki.issn1001-0076.2023.03.012

2023 Vol. 43, No. 3

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Article navigation > Conservation and Utilization of Mineral Resources > 2023 > 43(3): 105-111

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CAO Jincheng, HAN Yuexin, LIU lei, CAO Fei. Effect of Crushing Modes on Grinding Performance of Lean Hematite Iron Ore from Qidashan[J]. Conservation and Utilization of Mineral Resources, 2023, 43(3): 105-111. doi: 10.13779/j.cnki.issn1001-0076.2023.03.012

Citation:

CAO Jincheng, HAN Yuexin, LIU lei, CAO Fei. Effect of Crushing Modes on Grinding Performance of Lean Hematite Iron Ore from Qidashan[J]. Conservation and Utilization of Mineral Resources, 2023, 43(3): 105-111. doi: 10.13779/j.cnki.issn1001-0076.2023.03.012

Effect of Crushing Modes on Grinding Performance of Lean Hematite Iron Ore from Qidashan

1.
Zhengzhou Institute of Multipurpose Utilization of Mineral Resources, China Geological Survey, Zhengzhou 450006, Henan, China
2.
Key Laboratory for Polymetallic Ores' Evaluation and Utilization, MNR, Zhengzhou 450006, Henan, China
3.
School of Resources and Civil Engineering, Northeastern University, Shenyang 110819, Liaoning, China

More Information

Corresponding author: CAO Fei

Received Date: 30 May 2023

Publish Date: 15 June 2023

Abstract

Abstract

Compared with the traditional crushing equipments, the high-pressure roller mill (HPGR) has the advantages of high crushing efficiency, low unit energy consumption, and directly discarding tailings for grinding products. Taking the Qidashan lean hematite ore as the raw materials, the particle size distribution of grinding products, grinding technical efficiency, and Bond work index of ball mill of HPGR products and cone crushing (CC) products were investigated to compare the grinding performance of different crushing products. The results showed that compared with CC, the content of coarse particles in the follow-up grinding products decreased and the content of fine particles increased using HPGR under the same grinding conditions. The +0.15 mm size fraction decreased 9.41 percentage points after 9 min grinding, while the −0.031 mm increased 6.45 percentage points When the content of −0.074 mm particles in grinding products was lower than 70%, the grinding technical efficiency of HPGR products was lower than that of CC products. When the content of −0.074 mm particles in grinding products reached 80% or above, the grinding technical efficiency of HPGR products was slightly higher than that of CC products. The energy consumption of HPGR products was obviously lower than that of CC products. The Bond work index of ball mill of HPGR products was 2.74 to 10.84 percentage lower than that of CC products under different control sieve size conditions. This study provides a guidance for the HPGR application in ore comminution.
- lean hematite iron ore /
- high-pressure roller mill /
- cone crushing /
- grinding technical efficiency /
- bond work index of ball mill

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References

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