Occurrence and Distribution of Niobium in Aegirine-type Rare Earth Ore in Bayan Obo Mine

QIN Yufang; WANG Qiwei; JIN Hailong; LI Na

doi:10.13779/j.cnki.issn1001-0076.2021.03.021

2021 Vol. 41, No. 3

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Article navigation > Conservation and Utilization of Mineral Resources > 2021 > 41(3): 144-149

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QIN Yufang, WANG Qiwei, JIN Hailong, LI Na. Occurrence and Distribution of Niobium in Aegirine-type Rare Earth Ore in Bayan Obo Mine[J]. Conservation and Utilization of Mineral Resources, 2021, 41(3): 144-149. doi: 10.13779/j.cnki.issn1001-0076.2021.03.021

Citation:

QIN Yufang, WANG Qiwei, JIN Hailong, LI Na. Occurrence and Distribution of Niobium in Aegirine-type Rare Earth Ore in Bayan Obo Mine[J]. Conservation and Utilization of Mineral Resources, 2021, 41(3): 144-149. doi: 10.13779/j.cnki.issn1001-0076.2021.03.021

Occurrence and Distribution of Niobium in Aegirine-type Rare Earth Ore in Bayan Obo Mine

State Key Laboratory of Baiyun Obo Rare Earth Resources Researchs and Comprehensive Utilization, Baotou Research Institute of Rare Earths, Baotou 014030, China

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Corresponding author: WANG Qiwei, wangqiwei71@163.com

Received Date: 16 May 2021

Publish Date: 25 June 2021

Abstract

Abstract

The occurrence and distribution of niobium in the aegirine-type rare earth ore in the main and east mines of Bayan Obo deposit were systematically analyzed by means of multi element analysis, Polarizing microscope, field emission scanning electron microscope, micro area energy spectrum analysis and AMICS automatic mineral analysis system. The results show that the grade of niobium (Nb₂O₅) in the aegirine-type rare earth ore in the main and east mines is 0.22% and 0.14% respectively, and the grade of niobium in the main ore is higher than that in the east ore. There are 82.78% and 80.21% of Nb in the aegirine-type rare earth ore of the main and east ores respectively in the form of independent minerals, such as calcite, niobite, ferroniobium rutile, pyrochlore and Baotou ore.The two niobium minerals, mainly calcite and pyrochlore, are the most widely distributed in the aegirine-type rare earth ore of the main and east mines of Bayan Obo deposit, in which the distribution rate of niobium element is generally higher than that of niobite, ferroniobium rutile and other niobium minerals.The mineral content of calcite in the main ore is higher than that in the east ore, and there is no obvious change in pyrochlore content between the main ore and the east ore. According to the above research results, it is suggested to adopt the stage grinding stage separation process of gravity separation, magnetic separation, flotation and chemical separation.
- Bayan Obo ore /
- aegirine-type rare earth ore /
- niobium /
- occurrence state /
- distribution law

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