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The Role of Photoelectric and Dense-Medium Cyclone Separation as a Precursor to Flotation in the Beneficiation of a Phosphate Ore.

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Τίτλος: The Role of Photoelectric and Dense-Medium Cyclone Separation as a Precursor to Flotation in the Beneficiation of a Phosphate Ore.
Συγγραφείς: Li, Zhili, He, Dongsheng, Xu, Wei, Zheng, Zongyu, Liu, Hua, Tang, Yun, Shao, Hongsheng, Shi, Lianjun, Tang, Yuan, Fu, Yanhong, Li, Wanqing
Πηγή: Processes; Sep2026, Vol. 14 Issue 17, p2843, 16p
Θεματικοί όροι: Flotation, Photoelectric devices, Carbonate minerals, Machine separators, Phosphate rock, Silicate minerals, Ore-dressing
Γεωγραφικοί όροι: China, Hubei Sheng (China)
Περίληψη: To satisfy the industrial standards for phosphate products, phosphate ore must undergo beneficiation for the removal of gangue minerals such as carbonate minerals, silicate minerals, and clay minerals. Reverse flotation is commonly used to remove carbonate minerals from apatite. However, reverse flotation removes carbonate gangue minerals but fails to eliminate silicate and clay minerals. The use of pre-concentration (such as dense-medium cyclones and photoelectric sorting) in phosphate ore beneficiation enables the early rejection of gangue before the ore enters the fine-grinding and complex flotation circuits, thereby providing a range of technical and economic benefits. In addition, pre-concentration holds the potential to reject silicate and clay minerals in the beneficiation of phosphate ore. The phosphate ore investigated in this study was obtained from Hubei, China. It is characterized by well-defined gangue banding, which facilitates the liberation of some gangue minerals at relatively coarse comminution sizes (−15 + 0.5 mm). Based on these characteristics, photoelectric separation and dense-medium cyclone separation were employed as pre-concentration methods prior to reverse flotation, with the aim of achieving economically viable recoveries and marketable product grades. The results indicate that the combined dense-medium cyclone separation–reverse flotation process was the most effective for this phosphate ore, producing a final concentrate with a P2O5 grade of 31.08% and a recovery of 81.91%. Comparative evaluation reveals notable differences in gangue removal efficiency among the tested processes. While both reverse flotation and the combined photoelectric separation–reverse flotation process effectively removed dolomite, the dense-medium cyclone separation–reverse flotation process demonstrated superior overall performance by enabling the simultaneous removal of both silicate and dolomite impurities. [ABSTRACT FROM AUTHOR]
Copyright of Processes is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Βάση Δεδομένων: Complementary Index
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  Data: The Role of Photoelectric and Dense-Medium Cyclone Separation as a Precursor to Flotation in the Beneficiation of a Phosphate Ore.
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  Data: <searchLink fieldCode="DE" term="%22Flotation%22">Flotation</searchLink><br /><searchLink fieldCode="DE" term="%22Photoelectric+devices%22">Photoelectric devices</searchLink><br /><searchLink fieldCode="DE" term="%22Carbonate+minerals%22">Carbonate minerals</searchLink><br /><searchLink fieldCode="DE" term="%22Machine+separators%22">Machine separators</searchLink><br /><searchLink fieldCode="DE" term="%22Phosphate+rock%22">Phosphate rock</searchLink><br /><searchLink fieldCode="DE" term="%22Silicate+minerals%22">Silicate minerals</searchLink><br /><searchLink fieldCode="DE" term="%22Ore-dressing%22">Ore-dressing</searchLink>
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  Data: <searchLink fieldCode="DE" term="%22China%22">China</searchLink><br /><searchLink fieldCode="DE" term="%22Hubei+Sheng+%28China%29%22">Hubei Sheng (China)</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: To satisfy the industrial standards for phosphate products, phosphate ore must undergo beneficiation for the removal of gangue minerals such as carbonate minerals, silicate minerals, and clay minerals. Reverse flotation is commonly used to remove carbonate minerals from apatite. However, reverse flotation removes carbonate gangue minerals but fails to eliminate silicate and clay minerals. The use of pre-concentration (such as dense-medium cyclones and photoelectric sorting) in phosphate ore beneficiation enables the early rejection of gangue before the ore enters the fine-grinding and complex flotation circuits, thereby providing a range of technical and economic benefits. In addition, pre-concentration holds the potential to reject silicate and clay minerals in the beneficiation of phosphate ore. The phosphate ore investigated in this study was obtained from Hubei, China. It is characterized by well-defined gangue banding, which facilitates the liberation of some gangue minerals at relatively coarse comminution sizes (−15 + 0.5 mm). Based on these characteristics, photoelectric separation and dense-medium cyclone separation were employed as pre-concentration methods prior to reverse flotation, with the aim of achieving economically viable recoveries and marketable product grades. The results indicate that the combined dense-medium cyclone separation–reverse flotation process was the most effective for this phosphate ore, producing a final concentrate with a P<subscript>2</subscript>O<subscript>5</subscript> grade of 31.08% and a recovery of 81.91%. Comparative evaluation reveals notable differences in gangue removal efficiency among the tested processes. While both reverse flotation and the combined photoelectric separation–reverse flotation process effectively removed dolomite, the dense-medium cyclone separation–reverse flotation process demonstrated superior overall performance by enabling the simultaneous removal of both silicate and dolomite impurities. [ABSTRACT FROM AUTHOR]
– Name: Abstract
  Label:
  Group: Ab
  Data: <i>Copyright of Processes is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.3390/pr14172843
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      – Code: eng
        Text: English
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        PageCount: 16
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      – SubjectFull: China
        Type: general
      – SubjectFull: Hubei Sheng (China)
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      – SubjectFull: Flotation
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      – SubjectFull: Photoelectric devices
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      – SubjectFull: Phosphate rock
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              Text: Sep2026
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