Studies of Properties and Composition of Loparite Ore Mill Tailings
E. A. Krasavtseva1,2, D. V. Makarov2, V. V. Maksimova1,2, E. A. Selivanova3, P. V. Ikkonen4
1Laboratory for Nature-Like Technologies and Arctic Technosphere Safety, Kola Science Center, Russian Academy of Sciences, Apatity, 184209 Russia
2Institute of North Industrial Ecology Problems, Kola Science Center, Russian Academy of Sciences, Apatity, 184209 Russia
3Geological Institute, Kola Science Center, Russian Academy of Sciences, Apatity, 184209 Russia
4Tananaev Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials, Kola Science Center, Russian Academy of Sciences, Apatity, 184209 Russia
Keywords: Mill tailings, engineering geological characteristics, material constitution, effective specific activity, loparite
Abstract
The authors study the engineering geological characteristics and material constitution of loparite ore mill tailings in the active disposal area and in the dump decommissioned more than 30 years ago. The material constitutions and the contents of valuable components are nonunform in the test tailings. The content of light rare earth elements in fine fraction (- 0.071 mm) is 1.5-2 times higher than in the composite sample. Based on the calculated effective specific activity of natural radionuclides 226Ra, 232Th and 40K, the composite sample and the tailings fines belong in waste categories I and II, respectively.
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