| Zhengzhou Institute of Multipurpose Utilization of Mineral Resources, Chinese Academy of Geological Sciences | Host |
| Citation: |
WANG Liming, LI Hongjing, BAI Chunxia, SUI Yueting, LIU Tao. Experimental Study on Comprehensive Recovery of Rare Earth and Fluorite from an Iron Tailings of Concentrator in Bayan Obo[J]. Conservation and Utilization of Mineral Resources, 2022, 42(6): 52-59. doi: 10.13779/j.cnki.issn1001-0076.2022.06.007
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Experimental Study on Comprehensive Recovery of Rare Earth and Fluorite from an Iron Tailings of Concentrator in Bayan Obo
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Abstract
The Bayan Obo Iron Mine is a rare large-scale polymetallic deposit in the world, only iron ore and rare earth were utilized for many years. The recovery rate of rare earth in the beneficiation process is low, resulting in a considerable amount of rare earth and fluorite resources contained in the ore body being discharged into the tailings pond alongside the iron tailings. To achieve comprehensive recovery of rare earth and fluorite resources, the research on comprehensive recovery of rare earth and fluorite was carried out with the iron tailings of a concentrator in Bayan Obo. The process flow adopted in the test was rare earth flotation - fluorite preconcentration - fluorite concentration - high intensity magnetic separation. Sodium silicate, SR and 2# oil were used in rare earth flotation. Sodium silicate and SF were used in fluorite preconcentration. Acidified sodium silicate, SY and sodium oleate were used in fluorite concentration. Finally, rare earth concentrate with REO grade of 50.54%, REO recovery of 92.32% and fluorite concentrate with CaF2 grade of 95.51% and recovery of 50.98% were obtained.
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Keywords:
- Bayan Obo Iron Mine /
- tailings /
- rare earth /
- fluorite /
- flotation
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References
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WANG Liming, LI Hongjing, BAI Chunxia, SUI Yueting, LIU Tao. Experimental Study on Comprehensive Recovery of Rare Earth and Fluorite from an Iron Tailings of Concentrator in Bayan Obo[J]. Conservation and Utilization of Mineral Resources, 2022, 42(6): 52-59. doi: 10.13779/j.cnki.issn1001-0076.2022.06.007
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Figure 1.
Principle process of comprehensive recovery of rare earth and fluorite
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Figure 2.
Flow chart of rare earth flotation process
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Figure 3.
Effect of sodium silicate dosage on rare earth flotation
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Figure 4.
Effect of SR dosage on rare earth flotation
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Figure 5.
Process flow chart of closed circuit test on rare earth flotation
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Figure 6.
Process flow chart of fluorite preconcentration
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Figure 7.
Effect of sodium silicate dosage on roughing in fluorite preconcentration
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Figure 8.
Effect of SF dosage on roughing in fluorite preconcentration
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Figure 9.
Process flow chart of closed circuit test on fluorite preconcentration
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Figure 10.
Microscopic image of fluorite intergrowth
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Figure 11.
Process flow chart of fluorite concentration
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Figure 12.
Effect of acidified sodium silicate dosage on roughing in fluorite concentration
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Figure 13.
Effect of SY dosage on roughing in fluorite concentration
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Figure 14.
Effect of sodium oleate dosage on roughing in fluorite concentration
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Figure 15.
Process flow chart of closed circuit test on fluorite concentration
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Figure 16.
Process flow chart of closed circuit test on overall process