Journals →  Tsvetnye Metally →  2016 →  #2 →  Back

RARE METALS, SEMICONDUCTORS
ArticleName Low-temperature nonaqueous decomposition of chalcolamprite by organic solvent
DOI 10.17580/tsm.2016.02.10
ArticleAuthor Kopkova E. K., Muzhdabaeva M. A., Gromov P. B., Kuznetsov V. Ya.
ArticleAuthorData

I. V. Tananaev Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials of the Kola Science Center of the Russian Academy of Sciences, Apatity, Russia:

E. K. Kopkova, Senior Researcher, e-mail: kopkova@chemy.kolasc.net.ru
M. A. Muzhdabaeva, Researcher
P. B. Gromov, Deputy Director for Science
V. Ya. Kuznetsov, Researcher

Abstract

There is shown the possibility of low-temperature extraction of niobium and tantalum from chalcolamprite concentrate of Beloziminskoe deposit using nonaqueous solvent based on monatomic aliphatic alcohol and hydrofluoric acid (solvoprocess). Replacement of chemical reaction medium from water to organic one made possible the combination of concentrate decomposition and rare metal extraction in organic phase in one operation, decreasing decomposition temperature to 20 оС, and the process without outer heating (only at the expense of exothermal reaction heat). The process is the most efficient with the considerable excess of HF (S:L = 1:10), providing of both the high concentrate decomposition, and the favourable conditions for the following collective extraction of niobium and tantalum. Given the ratio of S:L = 1:10 and solvoprocess time (2.5 hours), more than 96% of Nb2O5 and 93% of Ta2O5 were extracted in organic phase for the single stage, with complete separation of uranium and thorium series' radionuclides in insoluble fluoride cake. Both radionuclides were efficiently separated after the sulphatization of fluoride cake with following water treatment at the temperature of 20 оС. The final product was obtained from hydrofluoric extracts, and contained 95% of Nb2O5, 1.5% of Ta2O5 and 2.10–4–5.10–2% (wt.) of impurity elements. This product may be used as a precursor for obtaining of fluoric salts of niobium and tantalum with their following processing with obtaining of metallic powder. There is offered the circuit diagram of chalcolamprite processing, which may be used for other tantal-niobates.

keywords Chalcolamprite, aliphatic alcohol, hydrofluoric acid, nonaqueous decomposition, solvoprocess, extract, niobium, tantalum, fluoride cake, radionuclides
References

1. Mulenko V. N., Petrova N. V., Sutyrin Yu. E., Zubarev V. I. Sozdanie novykh tekhnologicheskikh resheniy pri pererabotke bednykh i trudnoobogatimykh rud (Creation of new technological decisions during the processing of poor and complex ores). Tsvetnye Metally = Non-ferrous metals. 1993. No. 9. pp. 56–59.
2. Petrova N. V., Petrov V. B., Muzhdabaeva M. A., Prokofeva T. A. Razlozhenie pirokhlorovogo kontsentrata mineralnymi kislotami (Decomposition of chalcolamprite concentrate by mineral acids). Khimiya i tekhnologiya mineralnogo syrya Kolskogo poluostrova : sbornik nauchnykh trudov (Chemistry and technology of mineral raw materials of Kola Peninsula : collection of scientific proceedings). Saint Petersburg : Nauka, 1992. pp. 41–46.
3. A. S. Chernyak, R. D. Maslennikova. Sposob pererabotki pirokhlorovykh kontsentratov (Method of processing of chalcolamprite concentrates). Certificate of Authority USSR, No. 140208, IPC6 C 22 B 3/04. Applied: February 13, 1961. Published: 1961. Bulletin No. 15.

4. Xiuli Yang, Xiaohui Wang, Chang-Wei, Shili-Zheng. Extraction kinetics of tantalum from pulp using Levis cell. Hydrometallurgy. 2013. Vol. 131–132. pp. 34–39.
5. Kuzmin V. I., Pashkov G. L., Lomaev V. G., Voskresenskaya E. N., Kuzmina V. N. Combined approaches for comprehensive processing of rare lath metal ores. Hydrometallurgy. 2012. Vol. 129–130. pp. 1–6.
6. Kabangu M. J., Crouse P. L. Separation of niobium and tantalum from Mozambican tantalite by ammonium bifluoride digestion and octanol solvent extraction. Hydrometallurgy. 2012. Vol. 129–130. pp. 151–155.
7. Das G. K., Pranolo Y., Zhu Z., Cheng C. Y. Leaching of ilmenite ores by acidic chloride solutions. Hydrometallurgy. 2013. Vol. 133. pp. 94–99.
8. Mayorov V. G., Kirichenko N. V., Elizarova I. R., Safonova L. A., Nikolaev A. I. Ekstraktsiya ftoridov tantala, niobiya i surmy (Extraction of tantalum, niobium and antimony fluorides). Khimicheskaya tekhnologiya = Theoretical Foundations of Chemical Engineering. 2012. Vol. 13, No. 6. pp. 358–362.
9. Masloboeva S. M., Lebedev V. N., Arutyunyan L. G. Ekstraktsionnaya pererabotka ftoridno-sernokislykh rastvorov razlozheniya plyumbomikrolitovogo kontsentrata (Extraction processing of fluoride-sulphate solutions of plumbomicrolite concentrate decomposition). Vestnik Murmanskogo gosudarstvennogo tekhnicheskogo universiteta = Scientific Journal of Murmansk State Technical University. 2010. Vol. 13, No. 4/2. pp. 902–906.
10. Mayorov V. G., Nikolaev A. I., Kopkov V. K., Elizarova I. R. O shchelochnom vskrytii kolumbita i tantalita (About alkaline opening of columbite and tantalum). Zhurnal prikladnoy khimii = Russian Journal of Applied Chemistry. 2011. Vol. 84, No. 10. pp. 1602–1605.
11. Mayorov V. G., Nikolaev A. I., Kopkov V. K., Elizarova I. R. Tekhnologiya pererabotki tantalita (mestorozhdenie Kongo) i kolumbita (Zashikhinskoe mestorozhdenie) (Tchnology of processing of tantalite (Congo deposit) and columbite (Zashikhinskoe deposit)). Khimicheskaya tekhnologiya = Theoretical Foundations of Chemical Engineering. 2015. Vol. 16, No. 1. pp. 32–38.
12. Chekmarev A. M. Solvometallurgiya — perspektivnoe napravlenie metallurgii redkikh i tsvetnykh metallov (Solvometallurgy — a prospective site of metallurgy of rare and non-ferrous metals). Moscow : Atomizdat, 2004. 190 p.
13. Sierakowski M. J., Waddell J. E. Fluorocarbon fluids as gas carriers to aid in precious and base metal heap leaching operations. Patent US, No. 5603750, IPC С 22 В 11/00. Published: February 18, 1997.
14. Nakao Y., Kaeriyama K. Metod for extraction of gold and silver from ore with a solution containing a halogen, halogenated salt and organic solvent. Patent US, No. 5139752, IPC С 01 G 5/00. Published: February 18, 1992.
15. Kopkova E. K., Muzhdabaeva M. A., Gromov P. B. Nevodnoe razlozhenie loparitovogo kontsentrata oktanolnymi ekstraktami ftorovodorodnoy kisloty (Nonaqueous decomposition of loparite concentrate by octane extracts of hydrofluoric acid). Khimicheskaya tekhnologiya = Theoretical Foundations of Chemical Engineering. 2012. Vol. 13, No. 2. pp. 101–108.
16. Muzhdabaeva M. A., Kopkova E. K., Gromov P. B. Sposob izvlecheniya niobiya i tantala iz titanosoderzhashchego redkometalnogo kontsentrata (Method of extraction of niobium and tantalum from titanium-containing rare-metal concentrate). Patent RF, No. 2434958, IPC C 22 B 34/24. Applier and Petent-Holder: I. V. Tananaev Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials of the Kola Science Center of the Russian Academy of Sciences. Applied: June 21, 2010. Published: November 27, 2011. Bulletin No. 33.
17. Kopkova E. K., Shchelokova E. A., Gromov P. B. Processing of titanomagnetite concentrate with a hydrochloric extract of n-octanol. Hydrometallurgy. 2015. Vol. 156. pp. 21–27.
18. Galkin N. P., Sudarikov B. N., Veryatin U. D., Shishkov Yu. D., Mayorov A. A. Tekhnologiya urana (Uranium technology). Moscow : Atomizdat, 1964. 397 p.
19. Melnik N. A. Radiologicheskie aspekty pererabotki mineralnogo syrya Kolskogo regiona (Radiological aspects of processing of Kola region mineral raw materials). Tsvetnye Metally = Non-ferrous metals. 2012. No. 8. pp. 84–89.

Language of full-text russian
Full content Buy
Back