Occurrence State and Distribution Regularity of Niobium in a Beneficiation Product of Bayan Obo

doi:10.12068/j.issn.1005-3026.2021.02.015

Abstract

Abstract: The chemical composition， mineral composition， occurrence state of niobium and niobium minerals’ dissemination characteristics of Nb-bearing mineral raw materials of Bayan Obo were investigated by means of mineral liberation analyzer(MLA)， X-ray diffraction， scanning electron microscope， energy disperse spectroscopy and chemical analysis. The research results show that the chemical and mineral composition of the raw materials are complex， of which the grade of niobium and the total mass fraction of rare earth oxide are 1.10% and 1.37%， respectively. The main niobium minerals are nioboaeschynite， ilmenorutile， pyrochlore， dingdaohengite， mangancolumbite， niobite， baotite， and fergusonite， in which the highest mass fraction of nioboaeschynite， the highest mass fraction of niobium in mangancolumbite， and the highest metal distribution rate of niobium in nioboaeschynite are 1.84%， 54.34%， and 44.85%， respectively. The particle size of niobium minerals is relatively fine. Except nioboaeschynite， the liberation degrees of the rest niobium minerals are relatively low， which are mainly attached with riebeckite and iron oxide. From the perspective of process mineralogy， only by solving the problems of efficient enrichment of micro fine-grained niobium minerals and separation of Nb/Ti in raw niobium-bearing mineral materials could the goal of efficient and comprehensive utilization of Bayan Obo niobium mineral resources be achieved.

Key words: Bayan Obo; niobium; occurrence state; distribution regularity; mineral liberation

CLC Number:

TD91

SUN Lin-quan， YU Hong-dong， WANG Li-na， QI Tao. Occurrence State and Distribution Regularity of Niobium in a Beneficiation Product of Bayan Obo[J]. Journal of Northeastern University(Natural Science), 2021, 42(2): 252-259.

References

[1]Gulley A L，Nassar N T，Xun S.China，the United States，and competition for resources that enable emerging technologies［J］.Proceedings of the National Academy of Sciences，2018，115(16):4111-4115.
[2]翟明国，吴福元，胡瑞忠，等.战略性关键金属矿产资源:现状与问题［J］.中国科学基金，2019(2):106-111.(Zhai Ming-guo，Wu Fu-yuan，Hu Rui-zhong，et al.Critical metal mineral resources:current research status and scientific issues［J］.Bulletin of National Natural Science Foundation of China，2019(2):106-111.)
[3]曹飞，杨卉芃，张亮，等.全球钽铌矿产资源开发利用现状及趋势［J］.矿产保护与利用，2019，39(5):56-67，89.(Cao Fei，Yang Hui-peng，Zhang Liang，et al.Current situation and trend analysis of global tantalum and niobium mineral resources［J］.Conservation and Utilization of Mineral Resources，2019，39(5):56-67，89.)
[4]程征，伍喜庆.我国钽铌矿物资源概况及选矿技术现状与发展［J］.中国矿业，2013，22:151-157.(Cheng Zheng，Wu Xi-qing. Overview of tantalum and niobium mineral resources in China and present status and development of beneficiation technologies ［J］.China Mining Magazine，2013，22:151-157.)
[5]刘健，凌明星，李印，等.白云鄂博超大型REE-Nb-Fe矿床的稀土成矿模式综述［J］.大地构造与成矿学，2009，33(2):270-283.(Liu Jian，Ling Ming-xing，Li Yin，et al.REE ore forming models of giant Bayan Obo REE-Nb-Fe ore deposit:a review［J］.Geotectonica et Metallogenia，2009，33(2):270-283.)
[6]Rodriguez M H，Rosales G D，Pinna E G，et al.Extraction of niobium and tantalum from ferrocolumbite by hydrofluoric acid pressure leaching［J］.Hydrometallurgy，2015，156:17-20.
[7]Kasikova N I，Kasikov A G，Korotkova G V.Extraction of niobium from hydrochloric solutions with tertiary amines in aprotic diluents［J］.Russian Journal of Applied Chemistry，2010，83(3):425-430.
[8]EI-Hussaini O M，Rice N M.Liquid-liquid extraction of niobium and tantalum from aqueous sulphate/fluoride solutions by a tertiary amine［J］.Hydrometallurgy，2004，72(3):259-267.
[9]Swain N，Mishra S.A review on the recovery and separation of rare earths and transition metals from secondary resources［J］.Journal of Cleaner Production，2019，220:884-898.
[10]El-Hazek M N，Amer T E，Abu El-Azm M G，et al.Liquid-liquid extraction of tantalum and niobium by octanol from sulfate leach liquor［J］.Arabian Journal of Chemistry，2012，5(1):31-39.
[11]张铁柱，王建英，李保卫，等.白云鄂博稀土、铌、钍在矿石中分布规律及伴生关系［J］.稀土，2015， 36(5):87-91.(Zhang Tie-zhu，Wang Jian-ying，Li Bao-wei，et al.Distribution and association of REE，Nb and Th in Bayan Obo ore［J］.Chinese Rare Earth，2015，36(5):87-91.)
[12]侯晓志，杨占峰，王振江，等.白云鄂博铌精矿矿物组成特征及铌的分布规律研究［J］.有色金属(选矿部分)，2018(2):4-7，11.(Hou Xiao-zhi，Yang Zhan-feng，Wang Zhen-jiang，et al.Study on minerals composition characteristics of niobium concentrate and distribution of niobium in Bayan Obo［J］.Nonferrous Metals(Mineral Processing Section)，2018(2):4-7，11.)
[13]Yang X L，Zhang J W，Fang X L，et al.Kinetics of pressure leaching of niobium ore by sulfuric acid［J］.International Journal of Refractory Metals and Hard Materials，2014，45:218-222.
[14]Gao W，Wen J，Wu B，et al.Extraction of niobium，yttrium，and cerium from a low-grade niobium-bearing ore by roasting(NH₄)₂SO₄-Na₂SO₄-H₂SO₄ system［J］.Rare Metals，2014，33(6):754-760.
[15]Isabel B.Monte Carlo simulations of electron-sample interactions at phase boundaries and implications for automated mineralogy［J］.Minerals Engineering，2020，155:1-9.
[16]Al-Khirbash S A.Mineralogical characterization of low-grade nickel laterites from the north oman mountains:using mineral liberation analyses-scanning electron microscopy-based automated quantitative mineralogy［J/OL］.Ore Geology Reviews，2020，120［2020-06-02］.https://doi.org/10.1016/j.oregeorev.2020.103429.
[17]Pirrie D，Rollinson G K.Unlocking the applications of automated mineral analysis［J］.Geology Today，2011，27(6):226-235.
[18]Gu Y.Automated scanning electron microscope based mineral liberation analysis［J］.Journal of Minerals and Materials Characterization and Engineering，2003，2(1):33-41.
[19]于宏东，王丽娜，曲景奎，等.中国典型钒钛磁铁矿的工艺矿物学特征与矿石价值［J］.东北大学学报(自然科学版)，2020，41(2):275-281.(Yu Hong-dong，Wang Li-na，Qu Jing-kui，et al.Process mineralogical characteristics and ore value of typical vanadium titanium magnetite in China ［J］.Journal of Northeastern University(Natural Science)，2020，41(2):275-281.)
[20]Ulsen C，Kahn H， Nery G，et al.Gold characterization by MLA and technological tests-discussion of sample preparation and results［J］. Acta Mineralogica Sinica，2013，33(sup1):10.
[21]Xu C L，Zhong C B，Lyu R L，et al.Process mineralogy of Weishan rare earth ore by MLA［J］.Journal of Rare Earths，2019，37(3):334-338.