2411-3336 2541-9404 Записки Горного института Journal of Mining Institute Санкт-Петербургский горный университет императрицы Екатерины ΙΙ Empress Catherine II Saint Petersburg Mining University 10.31897/PMI.2022.88 pmi-15914 https://pmi.spmi.ru/pmi/article/view/15914 Металлургия и обогащение Metallurgy and concentration Study of the composition and properties of the beneficiation tailings of currently produced loparite ores Исследование состава и свойств хвостов обогащения лопаритовых руд текущего производства Maksimova Victoria V. Максимова В. В. Maksimova Victoria V. v.maksimova@ksc.ru 0000-0002-5080-5187 Лаборатория природоподобных технологий и техносферной безопасности Арктики КНЦ РАН (Россия) Laboratory of Nature-Inspired Technologies and Environmental Safety of the Arctic (Russia) Krasavtseva Eugenia A. Красавцева Е. А. Krasavtseva Eugenia A. e.krasavtseva@ksc.ru 0000-0002-8821-4446 Лаборатория природоподобных технологий и техносферной безопасности Арктики КНЦ РАН (Россия) Laboratory of Nature-Inspired Techno-logies and Environmental Safety of the Arctic (Russia) Savchenko Yevgeny E. Савченко Е. Э. Savchenko Yevgeny E. ye.savchenko@ksc.ru 0000-0002-5639-1907 Геологический институт КНЦ РАН (Россия) Geological Institute, Kola Science Centre of the RAS (Russia) Ikkonen Petr V. Икконен П. В. Ikkonen Petr V. p.ikkonen@ksc.ru Институт химии и технологии редких элементов и минерального сырья им. И.В.Тананаева КНЦ РАН (Россия) I.V.Tananaev Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials, Kola Science Centre of the RAS (Russia) Elizarova Irina R. Елизарова И. Р. Elizarova Irina R. i.elizarova@ksc.ru 0000-0002-4975-1708 Институт проблем промышленной экологии Севера КНЦ РАН (Россия) Institute of North Industrial Ecology Problems, Kola Science Centre of the RAS (Russia) Masloboev Vladimir A. Маслобоев В. А. Masloboev Vladimir A. v.masloboev@ksc.ru 0000-0002-1536-921X Институт проблем промышленной экологии Севера КНЦ РАН (Россия) Institute of North Industrial Ecology Problems, Kola Science Centre of the RAS (Russia) Makarov Dmitry V. Макаров Д. В. Makarov Dmitry V. d.makarov@ksc.ru 0000-0001-8930-1288 Институт проблем промышленной экологии Севера КНЦ РАН (Россия) Institute of North Industrial Ecology Problems, Kola Science Centre of the RAS (Russia) 03 11 2022 2022 256 642 650 27 06 2022 09 09 2022 03 11 2022 © 2022 В. В. Максимова, Е. А. Красавцева, Е. Э. Савченко, П. В. Икконен, И. Р. Елизарова, В. А. Маслобоев, Д. В. Макаров © 2022 Victoria V. Maksimova, Eugenia A. Krasavtseva, Yevgeny E. Savchenko, Petr V. Ikkonen, Irina R. Elizarova, Vladimir A. Masloboev, Dmitry V. Makarov 2022 В. В. Максимова, Е. А. Красавцева, Е. Э. Савченко, П. В. Икконен, И. Р. Елизарова, В. А. Маслобоев, Д. В. Макаров Victoria V. Maksimova, Eugenia A. Krasavtseva, Yevgeny E. Savchenko, Petr V. Ikkonen, Irina R. Elizarova, Vladimir A. Masloboev, Dmitry V. Makarov Эта статья доступна по лицензии Creative Commons Attribution 4.0 International (CC BY 4.0) This article is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0) https://pmi.spmi.ru/pmi/article/view/15914

Увеличение спроса на редкоземельные металлы и истощение природных ресурсов неизбежно приводит к необходимости поиска альтернативных нетрадиционных источников редкометалльного сырья. В статье представлены результаты исследования состава и свойств хвостов обогащения лопаритовых руд текущего производства. Проведены ситовой, минералогический, химический и радионуклидный анализы. Определено среднее содержание лопарита в хвостах обогащения. Методом сканирующей электронной микроскопии диагностированы минералы-концентраторы редкоземельных элементов в хвостах обогащения лопаритовых руд. Определено распределение ценных компонентов и тория в хвостах в зависимости от класса крупности частиц. Установлен радиево-ториевый характер радиоактивности, рассчитаны значения эффективной удельной активности проб. Сделан вывод о необходимости разработки комплексной технологии переработки хвостов обогащения лопаритовых руд, обусловленной сложным и неоднородным минеральным и химическим составом материала хвостов.

The increase in demand for rare earth metals and the depletion of natural resources inevitably causes the need to search for alternative unconventional sources of rare metal raw materials. The article presents the results of a study of the composition and properties of the beneficiation tailings of currently produced loparite ores. Sieve, mineralogical, chemical, and radionuclide analyses were carried out. The average content of loparite in tailings was determined. Using scanning electron microscopy, minerals-concentrators of rare earth elements in the loparite ore beneficiation tailings were diagnosed. The distribution of valuable components and thorium in the tailings was determined depending on the particle size class. The radium-thorium nature of radioactivity was established, the values of the effective specific activity of the samples were calculated. We concluded that it is necessary to develop an integrated technology for processing the beneficiation tailings of loparite ore, due to the complex and heterogeneous mineral and chemical composition of the tailings material.

 Ключевые слова хвостохранилища редкоземельные элементы хвосты обогащения технология переработки Keywords tailing dams rare earth elements beneficiation tailings processing technology Kyung Taek Rim, Kwon Ho Koo, Jung Sun Park. Toxicological evaluations of rare earths and their health impacts to workers: A Literature Review // Safety and Health at Work. 2013. Vol. 4. Iss. 1. P. 12-26. DOI: 10.5491/SHAW.2013.4.1.12 Kyung Taek Rim, Kwon Ho Koo, Jung Sun Park. Toxicological evaluations of rare earths and their health impacts to workers: A Literature Review. Safety and Health at Work. 2013. Vol. 4. Iss. 1, p. 12-26. DOI: 10.5491/SHAW.2013.4.1.12 Goodenough K.M., Wall F., Merriman D. The rare earth elements: demand, global resources, and challenges for resourcing future generation // Natural Product Research. 2018. Vol. 27. P. 201-216. DOI: 10.1007/s11053-017-9336-5 Goodenough K.M., Wall F., Merriman D. The rare earth elements: demand, global resources, and challenges for resourcing future generation. Natural Product Research. 2018. Vol. 27, p. 201-216. DOI: 10.1007/s11053-017-9336-5 Jordens A., Ying Ping Cheng, Waters K.E. A review of the beneficiation of rare earth element bearing minerals // Minerals Engineering. 2013. Vol. 41. P. 97-114. DOI: 10.1016/j.mineng.2012.10.017 Jordens A., Ying Ping Cheng, Waters K.E. A review of the beneficiation of rare earth element bearing minerals. Minerals Engineering. 2013. Vol. 41, p. 97-114. DOI: 10.1016/j.mineng.2012.10.017 Binnemans K., Jones P.T., Blanpain B. et al. Towards zero-waste valorisation of rare-earth-containing industrial process residues: A critical review // Journal of Cleaner Production. 2015. Vol. 99. P. 17-38. DOI: 10.1016/j.jclepro.2015.02.089 Binnemans K., Jones P.T., Blanpain B. et al. Towards zero-waste valorisation of rare-earth-containing industrial process residues: A critical review. Journal of Cleaner Production. 2015. Vol. 99, p. 17-38. DOI: 10.1016/j.jclepro.2015.02.089 Abaka-Wood G.B., Ehrig K., Addai-Mensah J., Skinner W. Recovery of Rare Earth Elements Minerals from Iron-Oxide-Silicate-Rich Tailings: Research Review // Eng. 2022. Vol. 3. Iss. 2. P. 259-275. DOI: 10.3390/eng3020020 Abaka-Wood G.B., Ehrig K., Addai-Mensah J., Skinner W. Recovery of Rare Earth Elements Minerals from Iron-Oxide-Silicate-Rich Tailings: Research Review. Eng. 2022. Vol. 3. Iss. 2, p. 259-275. DOI: 10.3390/eng3020020 Abaka-Wood G.B., Zanin M., Addai-Mensah J., Skinner W. Recovery of rare earth elements minerals from iron oxide-silicate rich tailings – Part 1: Magnetic separation // Minerals Engineering. 2019. Vol. 136. P. 50-61. DOI: 10.1016/j.mineng.2019.02.026 Abaka-Wood G.B., Zanin M., Addai-Mensah J., Skinner W. Recovery of rare earth elements minerals from iron oxide-silicate rich tailings – Part 1: Magnetic separation. Minerals Engineering. 2019. Vol. 136, p. 50-61. DOI: 10.1016/j.mineng.2019.02.026 Binnemans K., Jones P.T., Blanpain B. et al. Recycling of rare earths: A critical review // Journal of Cleaner Production. 2013. Vol. 51. P. 1-22. DOI: 10.1016/j.jclepro.2012.12.037 Binnemans K., Jones P.T., Blanpain B. et al. Recycling of rare earths: A critical review. Journal of Cleaner Production. 2013. Vol. 51, p. 1-22. DOI: 10.1016/j.jclepro.2012.12.037 Tunsu C., Petranikova M., Gergorić M. et al. Reclaiming rare earth elements from end-of-life products: A review of the perspectives for urban mining using hydrometallurgical unit operations // Hydrometallurgy. 2015. Vol. 156. P. 239-258. DOI: 10.1016/j.hydromet.2015.06.007 Tunsu C., Petranikova M., Gergorić M. et al. Reclaiming rare earth elements from end-of-life products: A review ofthe perspectives for urban mining using hydrometallurgical unit operations. Hydrometallurgy. 2015. Vol. 156, p. 239-258. DOI: 10.1016/j.hydromet.2015.06.007 Lokshin E.P., Tareeva O.A. Recovery of lanthanides from extraction phosphoric acid produced by the dihydrate process // Russian Journal of Applied Chemistry. 2010. Vol. 83. P. 951-957. DOI: 10.1134/S1070427210060042 Lokshin E.P., Tareeva O.A. Recovery of lanthanides from extraction phosphoric acid produced by the dihydrate process. Russian Journal of Applied Chemistry. 2010. Vol. 83, p. 951-957. DOI: 10.1134/S1070427210060042 Abhilash, Sinha S., Sinha M.K., Pandey B.D. Extraction of lanthanum and cerium from Indian red mud // International Journal of Mineral Processing. 2014. Vol. 127. 70-73. DOI: 10.1016/j.minpro.2013.12.009 Abhilash, Sinha S., Sinha M.K., Pandey B.D. Extraction of lanthanum and cerium from Indian red mud. International Journal of Mineral Processing. 2014. Vol. 127, p. 70-73. DOI: 10.1016/j.minpro.2013.12.009 Franus W., Wiatros-Motyka M.M., Wdowin, M. Coal fly ash as a resource for rare earth elements // Environmental Science and Pollution Research. 2015. Vol. 22. P. 9464-9474. DOI: 10.1007/s11356-015-4111-9 Franus W., Wiatros-Motyka M.M., Wdowin M. Coal fly ash as a resource for rare earth elements. Environmental Science and Pollution Research. 2015. Vol. 22, p. 9464-9474. DOI: 10.1007/s11356-015-4111-9 Delgado J., Pérez-López R., Galván L. et al. Enrichment of rare earth elements as environmental tracers of contamination by acid mine drainage in salt marshes: a new perspective // Marine Pollution Bulletin. 2012. Vol. 64. Iss. 9. P. 1799-1808. DOI: 10.1016/j.marpolbul.2012.06.001 Delgado J., Pérez-López R., Galván L. et al. Enrichment of rare earth elements as environmental tracers of contamination by acid mine drainage in salt marshes: a new perspective. Marine Pollution Bulletin. 2012. Vol. 64. Iss. 9, p. 1799-1808. DOI: 10.1016/j.marpolbul.2012.06.001 Stanujkic D., Zavadskas E.K., Karabasevic D. et al. An approach to solving complex decision-making problems based on IVIFNs: A case of comminution circuit design selection // Minerals Engineering. 2019. Vol. 138. P. 70-78. DOI: 10.1016/j.mineng.2019.04.036 Stanujkic D., Zavadskas E.K., Karabasevic D. et al. An approach to solving complex decision-making problems based on IVIFNs: A case of comminution circuit design selection. Minerals Engineering. 2019. Vol. 138, p. 70-78. DOI: 10.1016/j.mineng.2019.04.036 Cleary P.W., Delaney G.W., Sinnott M.D. et al. Advanced comminution modelling: Part 1– crushers // Applied Mathematical Modelling. 2020. Vol. 88. P. 238-265. DOI: 10.1016/j.apm.2020.06.049 Cleary P.W., Delaney G.W., Sinnott M.D. et al. Advanced comminution modelling: Part 1 – crushers. Applied Mathematical Modelling. 2020. Vol. 88, p. 238-265. DOI: 10.1016/j.apm.2020.06.049 Owusu K.B., Karageorgos J., Greet C., Zanin M. et al. Predicting mill feed grind characteristics through acoustic measurements // Minerals Engineering. 2021. Vol. 171. № 107099. DOI: 10.1016/J.MINENG.2021.107099 Owusu K.B., Karageorgos J., Greet C., Zanin M. et al. Predicting mill feed grind characteristics through acoustic measurements. Minerals Engineering. 2021. Vol. 171. N 107099. DOI: 10.1016/J.MINENG.2021.107099 Wall F., Rollat A., Pell R.S. Responsible sourcing of critical metals // Elements. 2017. Vol. 13. Iss. 5. P. 313-318. DOI: 10.2138/gselements.13.5.313 Wall F., Rollat A., Pell R.S. Responsible sourcing of critical metals. Elements. 2017. Vol. 13. Iss. 5, p. 313-318. DOI: 10.2138/gselements.13.5.313 Derome J., Lindroos A.J. Effects of heavy metal contamination on macronutrient availability and acidification parameters in forest soil in the vicinity of the Harjavalta Cu-Ni smelter, SW Finland // Environmental Pollution. 1998. Vol. 99. Iss. 2. P. 225-232. DOI: 10.1016/s0269-7491(97)00185-1 Derome J., Lindroos A.J. Effects of heavy metal contamination on macronutrient availability and acidification parameters in forest soil in the vicinity of the Harjavalta Cu-Ni smelter, SW Finland. Environmental Pollution. 1998. Vol. 99. Iss. 2, p. 225-232. DOI: 10.1016/s0269-7491(97)00185-1 Xiuwu Zhang, Linsheng Yang, Yonghua Li et al. Impacts of lead/zinc mining and smelting on the environment and human health in China // Environmental Monitoring & Assessment. 2012. Vol. 184. P. 2261-2273. DOI: 10.1007/s10661-011-2115-6 Xiuwu Zhang, Linsheng Yang, Yonghua Li et al. Impacts of lead/zinc mining and smelting on the environment and human health in China. Environmental Monitoring & Assessment. 2012. Vol. 184, p. 2261-2273. DOI: 10.1007/s10661-011-2115-6 Jie Liang, Chunting Feng, Guangming Zeng et al. Spatial distribution and source identification of heavy metals in surface soils in a typical coal mine city, Lianyuan, China // Environmental Pollution. 2017. Vol. 225. P. 681-690. DOI: 10.1016/j.envpol.2017.03.057 Jie Liang, Chunting Feng, Guangming Zeng et al. Spatial distribution and source identification of heavy metals in surface soils in a typical coal mine city, Lianyuan, China. Environmental Pollution. 2017. Vol. 225, p. 681-690. DOI: 10.1016/j.envpol.2017.03.057 Csavina J., Field J., Taylor M.P. et al. A review on the importance of metals and metalloids in atmospheric dust and aerosol from mining operations // Science of the Total Environment. 2012. Vol. 433. P. 58-73. DOI: 10.1016/j.scitotenv.2012.06.013 Csavina J., Field J., Taylor M.P. et al. A review on the importance of metals and metalloids in atmospheric dust and aerosol from mining operations. Science of the Total Environment. 2012. Vol. 433, p. 58-73. DOI: 10.1016/j.scitotenv.2012.06.013 Zhen Cheng, Jingkun Jiang, Fajardo O.A. et al. Characteristics and health impacts of particulate matter pollution in China (2001-2011) // Atmospheric Environment. 2013. Vol. 65. P. 186-194. DOI: 10.1016/j.atmosenv.2012.10.022 Zhen Cheng, Jingkun Jiang, Fajardo O.A. et al. Characteristics and health impacts of particulate matter pollution in China (2001-2011). Atmospheric Environment. 2013. Vol. 65, p. 186-194. DOI: 10.1016/j.atmosenv.2012.10.022 КрасавцеваЕ.А., МакаровД.В., МаксимоваВ.В. идр. Результаты исследований свойств и состава хвостов обогащения лопаритовых руд // Физико-технические проблемы разработки полезных ископаемых. 2021. № 3. С. 190-198. DOI: 10.15372/FTPRPI20210318 Krasavtseva E.A., Makarov D.V., Maksimova V.V. et al. Studies of Properties and Composition of Loparite Ore Mill Tailings. Fiziko-texhnicheskiye problemy razrabbotki poleznykh iskopaemykh. 2021. N 3, p. 190-198 (in Russian). DOI: 10.15372/FTPRPI20210318 Горячев А.А., Красавцева Е.А., Лащук В.В. и др. Оценка экологической опасности и возможности переработки хвостов обогащения лопаритовых руд // Экология и промышленность России. 2020. Т. 24. № 12. С. 46-51. DOI: 10.18412/1816-0395-2020-12-46-51 Goryachev A., Krasavtseva E., Lashchuk V. et al. Assessment of the Environmental Hazard and Possibility of Processing of Refinement Tailings of Loparite Ores Concentration. Ecology and industry of Russia. 2020. Vol. 24. N 12, p. 46-51 (in Russian).DOI: 10.18412/1816-0395-2020-12-46-51 Огородников В.Н., Поленов Ю.А., Савичев А.Н., Кисин А.Ю. Редкоземельный состав апатита для целей фациального анализа и поисков особочистого кварца // Труды Института геологии и геохимии им. академика А.Н. Заварицкого. 2020. № 167. С. 122-128 Ogorodnikov V.N., Polenov Yu.A., Savichev A.N., Kisin A.Yu. Rare-earth composition of apatite for the purposes of facies analysis and search for high-purity quartz. Trudy Instituta geologii i geokhimii im. akademika A.N.Zavaritskogo. 2020. N 167, p. 122-128 (in Russian). Taylor S.R., McLennan S.M. The continental crust: its composition and evolution. Oxford: Blackwell Scientific Publications, 1985. 312 p. Taylor S.R., McLennan S.M. The continental crust: its composition and evolution. Oxford: Blackwell Scientific Publications, 1985, p. 312. Greenwood N.N., Earnshaw A. Chemistry of the Elements. Oxford: Butterworth-Heinemann, 1997. 1359 p. Greenwood N.N., Earnshaw A. Chemistry of the Elements. Oxford: Butterworth-Heinemann, 1997, p. 1359. Котельникова А.Д., Рогова О.Б., Столбова В.В. Лантаноиды в почве: поступление, содержание, влияние на растения, генотоксичность (обзор) // Почвоведение. 2021. № 1. С. 100-119. DOI: 10.31857/S0032180X21010056 Kotelnikova A.D., Rogova O.B., Stolbova V.V. Lanthanides in the Soil: Routes of Entry, Content, Effect on Plants, and Genotoxicity (A Review). Eurasian Soil Science. 2021. Vol. 54. N 1, p. 117-134. DOI: 10.1134/S1064229321010051 Hailong Tang, Xiaojing Wang, Weitao Shuai, Yangsheng Liu. Immobilization of Rare Earth Elements of the Mine Tailings Using Phosphates and Lime // Procedia Environmental Sciences. 2016. Vol. 31. P. 255-263. DOI: 10.1016/j.proenv.2016.02.034 Hailong Tang, Xiaojing Wang, Weitao Shuai, Yangsheng Liu. Immobilization of Rare Earth Elements of the Mine Tailings Using Phosphates and Lime. Procedia Environmental Sciences. 2016. Vol. 31, p. 255-263. DOI: 10.1016/j.proenv.2016.02.034 Bo Zhang, Chengjun Liu, Chunlong Li, Maofa Jiang. A novel approach for recovery of rare earths and niobium from Bayan Obo tailings // Minerals Engineering. 2014. Vol. 65. P. 17-23. DOI: 10.1016/j.mineng.2014.04.011 Bo Zhang, Chengjun Liu, Chunlong Li, Maofa Jiang. A novel approach for recovery of rare earths and niobium from Bayan Obo tailings. Minerals Engineering. 2014. Vol. 65, p. 17-23. DOI: 10.1016/j.mineng.2014.04.011 Lim B., Alorro R. Technospheric Mining of Mine Wastes: A Review of Applications and Challenges // Sustainable Chemistry. 2021. Vol. 2. Iss. 4. P. 686-706. DOI: 10.3390/suschem2040038 Lim B., Alorro R. Technospheric Mining of Mine Wastes: A Review of Applications and Challenges. Sustainable Chemistry. 2021. Vol. 2. Iss. 4, p. 686-706. DOI: 10.3390/suschem2040038 Pan J., Vaziri Hassas B., Rezaee M. et al. Recovery of rare earth elements from coal fly ash through sequential chemical roasting, water leaching, and acid leaching processes // Journal of Cleaner Production. 2021. Vol. 284. № 124725. DOI: 10.1016/j.jclepro.2020.124725 Pan J., Vaziri Hassas B., Rezaee M. et al. Recovery of rare earth elements from coal fly ash through sequential chemical roasting, water leaching, and acid leaching processes. Journal of Cleaner Production. 2021. Vol. 284. N 124725. DOI: 10.1016/j.jclepro.2020.124725 Kuppusamy, V. K., Holuszko, M. Sulfuric acid baking and water leaching of rare earth elements from coal tailings // Fuel. 2022. Vol. 319. № 123738. DOI: 10.1016/j.fuel.2022.123738 Kuppusamy, V. K., Holuszko, M. Sulfuric acid baking and water leaching of rare earth elements from coal tailings. Fuel. 2022. Vol. 319. N 123738. DOI: 10.1016/j.fuel.2022.123738 Thi Thuy Nhi Nguyen, Man Seung Lee. Purification of the Sodium Hydroxide Leaching Solution of Black Dross by Removal of Silicate (IV) with Polyacrylamide (PAM) // Mineral Processing and Extractive Metallurgy Review. 2021. Vol. 42. Iss. 1. P. 9-16. DOI: 10.1080/08827508.2019.1657862 Thi Thuy Nhi Nguyen, Man Seung Lee. Purification of the Sodium Hydroxide Leaching Solution of Black Dross by Removal of Silicate (IV) with Polyacrylamide (PAM). Mineral Processing and Extractive Metallurgy Review. 2021. Vol. 42. Iss. 1, p. 9-16. DOI: 10.1080/08827508.2019.1657862 Митрофанова Г.В., Черноусенко Е.В., Артемьев А.В. Техногенные месторождения Мурманской области как перспективные источники минерального сырья // Маркшейдерия и недропользование. 2020. № 3(107). С. 9-16. Mitrofanova G., Chernousenko E., Artemyev A. Chnogenic Deposits of the Murmansk Region as Prospective Sources of Mineral Raw Materials. Mine Surveying and Subsurface Use. 2020. N 3(107), p. 9-16 (in Russian). Митрофанова Г.В., Черноусенко Е.В., Каменева Ю.С., Вишнякова И.Н. Опробование комплексообразующего реагента на основе гидроксамовых кислот при флотации минералов переходных металлов // Вестник Кольского научного центра РАН. 2019. Т. 11. № 2. С. 95-104. DOI: 10.25702/KSC.2307-5228.2019.11.2.95-104 Mitrofanova G.V., Chernousenko E.V., Kameneva Yu.S., Vishnyakova I.N. Testing of a Complexing Reagent on the Basis of Hydroxamic Acids by Floating Transition Metal Minerals. Vestnik Kol'skogo nauchnogo tsentra RAN. 2019. Vol. 11. N 2, p. 95-104 (in Russian). DOI: 10.25702/KSC.2307-5228.2019.11.2.95-104 Ракаев А.И., Черноусенко Е.В., Рухленко Е.Д., Алексеева С.А. Получение нефелинового концентрата из отвальных хвостов обогатительных фабрик Ловозерского ГОКа // Обогащение руд. 2007. № 1. С. 8-11. Rakaev А.I., Chernousenko Ye.V., Rukhlenko Ye.D., Alekseeva S.А. Production of Nepheline Concentrate From Final Tailings of the Lovozyorsky Mining Complex Concentrating Plants. Obogashchenie rud. 2007. N 1, p. 8-11 (in Russian). Marion C., Grammatikopoulos T., Rudinsky S. et al. A mineralogical investigation into the pre-concentration of the Nechalacho deposit by gravity separation // Minerals Engineering. 2018. Vol. 121. P. 1-13. DOI: 10.1016/j.mineng.2018.02.008 Marion C., Grammatikopoulos T., Rudinsky S. et al. A mineralogical investigation into the pre-concentration of the Nechalacho deposit by gravity separation. Minerals Engineering. 2018. Vol. 121, p. 1-13. DOI: 10.1016/j.mineng.2018.02.008 Faris N., Ram R., Tardio J. et al. Characterisation of a ferruginous rare earth bearing lateritic ore and implications for rare earth mineral processing // Minerals Engineering. 2019. Vol. 134. P. 23-36. DOI: 10.1016/j.mineng.2019.01.019 Faris N., Ram R., Tardio J. et al. Characterisation of a ferruginous rare earth bearing lateritic ore and implications for rare earth mineral processing. Minerals Engineering. 2019. Vol. 134, p. 23-36. DOI: 10.1016/j.mineng.2019.01.019 Черноусенко Е.В., Перункова Т.Н., Артемьев А.В., Митрофанова Г.В. Совершенствование технологий флотационного обогащения руд Кольского полуострова // Горный журнал. 2020. № 9. С. 66-72. DOI: 10.17580/gzh.2020.09.09 Chernousenko E.V., Perunkova T.N., Artemiev A.V., Mitrofanova G.V. Improvement of flotation technologies for the Kola Peninsula ore. Gornyi Zhurnal. 2020 N 9, p. 66-72 (in Russian). DOI: 10.17580/gzh.2020.09.09 Bochneva A., Lalomov A., LeBarge W. Placer mineral deposits of Russian Arctic zone: Genetic prerequisites of formation and prospect of development of mineral resources // Ore Geology Reviews. 2021. Vol. 138. № 104349. DOI: 10.1016/j.oregeorev.2021.104349 Bochneva A., Lalomov A., LeBarge W. Placer mineral deposits of Russian Arctic zone: Genetic prerequisites of formation and prospect of development of mineral resources. Ore Geology Reviews. 2021. Vol. 138. N 104349. DOI: 10.1016/j.oregeorev.2021.104349 Huber M., Kamiński D., Czernel G., Kozlov E. Optical and Spectroscopic Properties of Lorenzenite, Loparite, Perovskite, Titanite, Apatite, Carbonates from the Khibiny, Lovozero, Kovdor, and Afrikanda Alkaline Intrusion of Kola Peninsula (NE Fennoscandia) // Crystals. 2022. Vol. 12. Iss. 2. № 224. DOI: 10.3390/cryst12020224 Huber M., Kamiński D., Czernel G., Kozlov E. Optical and Spectroscopic Properties of Lorenzenite, Loparite, Perovskite, Titanite, Apatite, Carbonates from the Khibiny, Lovozero, Kovdor, and Afrikanda Alkaline Intrusion of Kola Peninsula (NE Fennoscandia). Crystals. 2022. Vol. 12. Iss. 2. N 224. DOI: 10.3390/cryst12020224 Deqian Li, Yong Zuo, Shulan Meng. Separation of thorium(IV) and extracting rare earths from sulfuric and phosphoric acid solutions by solvent extraction method // Journal of Alloys and Compounds. 2004. Vol. 374. Iss. 1-2. P. 431-433. DOI: 10.1016/j.jallcom.2003.11.055 Deqian Li, Yong Zuo, Shulan Meng. Separation of thorium (IV) and extracting rare earths from sulfuric and phosphoric acid solutions by solvent extraction method. Journal of Alloys and Compounds. 2004. Vol. 374. Iss. 1-2, p. 431-433. DOI: 10.1016/j.jallcom.2003.11.055 García A.C., Latifi M., Amini A., Chaouki J. Separation of Radioactive Elements from Rare Earth Element-Bearing Minerals // Metals. 2020. Vol. 10. Iss. 11. № 1524. DOI: 10.3390/met10111524 García A.C., Latifi M., Amini A., Chaouki J. Separation of Radioactive Elements from Rare Earth Element-Bearing Minerals. Metals. 2020. Vol. 10. Iss. 11. N 1524. DOI: 10.3390/met10111524 Sarker S.K., Haque N., Bhuiyan M., Bruckard W., Pramanik B.K. Recovery of strategically important critical minerals from mine tailings // Journal of Environmental Chemical Engineering. 2022. Vol. 10. Iss. 3. № 107622. DOI: 10.1016/j.jece.2022.107622 Sarker S.K., Haque N., Bhuiyan M., Bruckard W., Pramanik B.K. Recovery of strategically important critical minerals from mine tailings. Journal of Environmental Chemical Engineering. 2022. Vol. 10. Iss. 3. N 107622. DOI: 10.1016/j.jece.2022.107622