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High Pressure Grinding Roll Combined with Staged-Grinding and Staged-Separation Technology for Amphibolite-Type Magnetite in Yuanjiacun Iron Mine
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Xian LI1, Liangfei LUO2, Zhigang ZHONG2, Zongwei LI2, Hu ZHANG3
Mining and Metallurgical Engineering | 2023, 43(3) : 93 - 96
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Mining and Metallurgical Engineering | 2023, 43(3): 93-96
• MINERAL PROCESSING •
High Pressure Grinding Roll Combined with Staged-Grinding and Staged-Separation Technology for Amphibolite-Type Magnetite in Yuanjiacun Iron Mine
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Xian LI1, Liangfei LUO2, Zhigang ZHONG2, Zongwei LI2, Hu ZHANG3
Affiliations
  • 1.Lan County Mining Co Ltd, Taiyuan Iron & Steel(GroupCo Ltd, Lan County 030027, Shanxi, China
  • 2.Changsha Research Institute of Mining & Metallurgy Co Ltd, Changsha 410012, Hunan, China
  • 3.Chengdu Leejun Industrial Co Ltd, Chengdu 610045, Sichuan, China
Published: 2023-06-01 doi: 10.3969/j.issn.0253-6099.2023.03.021
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The amphibolite-type magnetite ore in Yuanjiacun Iron Mine was processed adopting a processing technique consisting of high pressure grinding roll (HPGR) plus pre-concentration, followed by staged grinding and staged separation process. In order to reduce the grinding feed in the following concentration, HPGR was introduced for superfine crushing, and the obtained material in a size fraction of－3 mm was treated by a wet pre-concentration process, yielding 22% coarse tailings for discarding. And then a pre-concentration process resulted in the obtained concentrate with TFe grade up to around 36%. The work index for grinding before and after adopting HPGR was reduced from 11.91 kW·h/t to 11.11 kW·h/t. An experiment was performed with a flowsheet of HPGR plus pre-concentration followed by staged grinding and staged separation process, yielding 33.92% concentrate grading 67.13% TFe at 75.75% recovery, showing the ratio of concentration down to 2.27 from 2.95. It is concluded that the above-mentioned processing technique can provide an energy-conservation and consumption-reduction solution for large-scale and low-cost exploitation of similar low-grade magnetite mines.

magnetite  /  high pressure grinding roll (HPGR)  /  pre-concentration  /  low intensity magnetic separation  /  reverse flotation  /  staged grinding and staged separation  /  Yuanjiacun Iron Mine
Xian LI, Liangfei LUO, Zhigang ZHONG, Zongwei LI, Hu ZHANG. High Pressure Grinding Roll Combined with Staged-Grinding and Staged-Separation Technology for Amphibolite-Type Magnetite in Yuanjiacun Iron Mine[J]. Mining and Metallurgical Engineering, 2023 , 43 (3) : 93 -96 . DOI: 10.3969/j.issn.0253-6099.2023.03.021
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Year 2023 volume 43 Issue 3
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Article Info
doi: 10.3969/j.issn.0253-6099.2023.03.021
  • Receive Date：2022-11-26
  • Online Date：2026-03-05
  • Published：2023-06-01
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History
  • Received：2022-11-26
Affiliations
    1.Lan County Mining Co Ltd, Taiyuan Iron & Steel(GroupCo Ltd, Lan County 030027, Shanxi, China
    2.Changsha Research Institute of Mining & Metallurgy Co Ltd, Changsha 410012, Hunan, China
    3.Chengdu Leejun Industrial Co Ltd, Chengdu 610045, Sichuan, China
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https://castjournals.cast.org.cn/joweb/kygczz/EN/10.3969/j.issn.0253-6099.2023.03.021
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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