Effect of Additives on the Micro Separation Mechanism of Low Grade Rare Earth-Niobium-Iron Crude Concentrate During Reduction Roasting AITranslate
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The effects were studied of additives on the separation of iron, rare earth and niobium from low grade rare earth-niobium-iron crude concentrate during reduction roasting. The results show that when the crude concentrate with 31.9% TFe,3.16G REO and 2.91~//00 Nb205 is processed by direct reduction roast- ing,the iron grade of magnetic material is only 54. 45% ,and the recoveries of rare earth and niobium are 44.28% and 62.65% ,respectively. The reduction roasting effect is the best when 15% Na2SO4 and 5% activated carbon powder are added,the iron grade of magnetic material in the product is 89. 32% ,the iron recovery is 91.47%, REO and Nb20s contents of the non-magnetic materials are 5. 36% and 4. 62%, and their recoveries reach 96.09% and 95.83% ,respectively. The microstructure research results indicate that in the product from reduction roasting without additives, the iron granules are fine and have no clear boundary with other minerals, the aggregation degree of most rare earth and niobium granules are low, the grains are not well-knit, and the separation is not effective. In the product from reduction roasting added with Na2SO4 and activated carbon powder,iron,rare earth and niobium granules aggregate and grow up, and boundary between iron, rare earth, niobium and other minerals is clear, which is benefit for separation.
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DOI：
Chinese Library Classification Number:TD955[矿业工程—选矿]
Citation Information:
The effects were studied of additives on the separation of iron, rare earth and niobium from low grade rare earth-niobium-iron crude concentrate during reduction roasting. The results show that when the crude concentrate with 31.9% TFe,3.16G REO and 2.91~//00 Nb205 is processed by direct reduction roast- ing,the iron grade of magnetic material is only 54. 45% ,and the recoveries of rare earth and niobium are 44.28% and 62.65% ,respectively. The reduction roasting effect is the best when 15% Na2SO4 and 5% activated carbon powder are added,the iron grade of magnetic material in the product is 89. 32% ,the iron recovery is 91.47%, REO and Nb20s contents of the non-magnetic materials are 5. 36% and 4. 62%, and their recoveries reach 96.09% and 95.83% ,respectively. The microstructure research results indicate that in the product from reduction roasting without additives, the iron granules are fine and have no clear boundary with other minerals, the aggregation degree of most rare earth and niobium granules are low, the grains are not well-knit, and the separation is not effective. In the product from reduction roasting added with Na2SO4 and activated carbon powder,iron,rare earth and niobium granules aggregate and grow up, and boundary between iron, rare earth, niobium and other minerals is clear, which is benefit for separation.
quote
| GB/T 7714-2015 | [1] LIU Mu-dan, LIU Yong, LIU Zhen-zhen. Effect of Additives on the Micro Separation Mechanism of Low Grade Rare Earth-Niobium-Iron Crude Concentrate During Reduction Roasting[J]. Rare Metals and Cemented Carbides, 2018(2): 6-10. |
| MLA | [1] LIU Mu-dan, et al., "Effect of Additives on the Micro Separation Mechanism of Low Grade Rare Earth-Niobium-Iron Crude Concentrate During Reduction Roasting." Rare Metals and Cemented Carbides, no. 2, 2018, pp. 6-10. |
| APA | [1] LIU Mu-dan, LIU Yong, & LIU Zhen-zhen. (2018). Effect of Additives on the Micro Separation Mechanism of Low Grade Rare Earth-Niobium-Iron Crude Concentrate During Reduction Roasting. Rare Metals and Cemented Carbides(2), 6-10. |
| IEEE | [1] LIU Mu-dan, LIU Yong, and LIU Zhen-zhen, "Effect of Additives on the Micro Separation Mechanism of Low Grade Rare Earth-Niobium-Iron Crude Concentrate During Reduction Roasting," Rare Metals and Cemented Carbides, no. 2, pp. 6-10, 2018. keywords: {rare earth-niobium-iron associated ore;additive;reduction roasting;microstructure;Na2SO1;activated carbon} |