Journals →  Gornyi Zhurnal →  2019 →  #9 →  Back

ArticleName Producibility of Ta and Nb rare earth concentrates from ore from anomalous zone in the Kovdor deposit
DOI 10.17580/gzh.2019.09.05
ArticleAuthor Gazaleevа G. I., Buzunova T. A., Vlasov I. A.

OJSC «Uralmekhanobr», Yekaterinburg, Russia:

G. I. Gazaleevа, Head of Department, Doctor of Engineering Sciences,
T. A. Buzunova, Senior Researcher, Candidate of Engineering Sciences
I. A. Vlasov, Senior Researcher


The article reports the mineralogical and production research results on the anomalous zone ore of the Kovdor deposit. According to the research, the ore zone has a complex geological structure, and is composed of basic minerals (magnetite, apatite and baddelaite) and accessory tantalum–niobium minerals of hatchettolite and zirkelite. For magnetic separation tailings, the efficient modes of ball milling and the required level of dissociation of useful minerals for further treatment by gravity, magnetic and flotation separation are determined: particle size of 0.16 +0.044 mm for magnetite, apatite and baddelaite as well as 0.044+0 mm for hattchetolittes. Furthermore, the research finds that medium-size apatite particles of 0.1–0.071 mm possess the best floatability. The developed technology provides gentle dissociation of accretions with first-stage production of iron concentrate, as in the current process flow chart, and later-stage manufacturing of apatite, baddeleite and tantalum–niobium concentrates from tailings of magnetic separation. Sample processing only produces iron concentrate with iron content of 67.1 % and phosphorus pentoxide of 0.14 % at iron recovery of 92.3 %. Production of quality apatite concentrates from highly carbonaceous ore is very difficult; for this reason, phosphorus pentoxide recovery is not high, 20.06 % in average, as against initial recovery of 47.5 %. Hattchetolittes concentrate in the magnetic fraction, at the mass fractions of 0.2 % of Nb2O5 and 0.041 % of Ta2O5. The recovery makes, respectively, 21 and 22 %. The particle size of the hattchetolitte products was less than 0.04 mm. The analyses of material constitution and processing properties reveal that hattchetolitte and zirkelite dissociate at the size of 10–30 μm, possess super high sludging and feature super fine intergrowth. The research points at problematic recovery of Ta and Nb rare earths due to natural morphology and processing featursz of ore in the anomalous zone of the Kovdor deposit.

keywords Iron ore, rare earth minerals, material constitution, processing circuit, tailings, concentrates

1. Levchenko E. N., Gazaleeva G. I., Vlasov I. A., Buzunova T. A. Mineralogical and technological estimation of ore from the anomalous zone Kovdor deposit. Razvedka i okhrana nedr. 2018. No. 10. pp. 36–43.
2. Afanasev B. V. Mineral reserves of the alkaline–ultrabasic rock masses of the Kola Peninsula. Saint-Petersburg : Roza vetrov, 2011. 224 p.
3. Application guide for Classification of solid mineral reserves and potential resources. Niobium, tantalum ores and rare earth elements. Moscow, 2007. 42 p.
4. Andronov G. P., Zakharova I. B., Filimonova N. M., Rukhlenko E. D. Flotation features of fluor and carbonate–fluor–apatite from calcite-bearing ore. Resource Saving and Environmental Protection in Mineral Treatment and Processing (Plaksin’s Lectures – 2016) : International Conference Proceedings. Moscow : Ore and Metals Publishing House, 2016. pp. 120–123.
5. Gazaleeva G. I. Theory, technology and equipment of mineral grinding : Textbook. Ekaterinburg : AMB, 2017. 352 p.
6. Lapin A. V., Levchenko E. N., Kulikova I. M., Nabelkin O. A., Ivanov V. I. X-ray microspectrum analysis (election–probe) аof rare metal ores and products using wavelength dispersion scanner WDS : Guideline. Moscow, 2016. No. 186. 55 p.
7. Mikhailova J. A., Kalashnikov A. O., Sokharev V. A., Pakhomovsky Ya. A., Konopleva N. G. et al. 3D mineralogical mapping of the Kovdor phoscorite-carbonatite complex (Russia). Mineralium Deposita. 2016. Vol. 51, Iss. 1. pp. 131–149.
8. Orlov V. P. (Ed.). Mineral raw materials : reference book. Moscow : Geoinformmark, 1999. 302 p.
9. Klassen V. I. Ore dressing (chemical feedstock) : Teaching aid. Moscow : Nedra, 1979. 239 p.
10. Maslov A. A., Ostvald R. V., Shagalov V. V., Maslova E. S., Gorenyuk Yu. S. Chemical technology of niobium and tantalum : Teaching aid. Tomsk : Izdatelstvo Tomskogo politekhnicheskogo universiteta, 2010. 97 p.
11. Kozin V. Z. Analysis of ore dressability : Teaching aid. Ekaterinburg : UGGU, 2009. 379 p.
12. Petrov I. M. Method of concentration of rare-earth ores. Patent RF, No. 2182521. Applied: 27.06.2001. Published: 20.05.2002.
13. Pelevin A. E., Cherepanov D. V. Influence of particles particularity on magnetic force and on the results of dry magnetic separation. Innovative Technologies of Mineral Processing and Waste Management : International Conference Proceedings. Ekaterinburg, 2017. pp. 163–167.
14. Kalashnikov A. O., Yakovenchuk V. N., Pakhomovsky Y. A., Bazai A. V., Sokharev V. A. et al. Scandium of the Kovdor baddeleyite–apatite–magnetite deposit (M urmansk Region, Russia): Mineralogy, spatial distribution, and potential resource. Ore Geology Reviews. 2016. Vol. 72. pp. 532–537.
15. Yakovenchuk V. N., Ivanyuk G. Yu., Pakhomovsky Y. A., Panikorovskii T. L., Britvin S. N. et al. Kampelite, Ba3Mg1.5Sc4(PO4)6(OH)3·4H2O, a new very complex Ba-Sc phosphate mineral from the Kovdor phoscorite-carbonatite complex (Kola Peninsula, Russia). Mineralogy and Petrology. 2018. Vol. 112, Iss. 1. pp. 111–121.

Language of full-text russian
Full content Buy