Korovin V.Yu., Pohorielov Yu.M., Shestak Yu.G., Valiaiev O.M. Impact of the urea nitrate content in the leaching solution on the granite weight decrease and the fluoride ion concentration
- Details
- Parent Category: Geo-Technical Mechanics, 2023
- Category: Geo-Technical Mechanics, 2023, Issue 164
Geoteh. meh. 2023, 164, 157-165
https://doi.org/10.15407/geotm2023.164.157
IMPACT OF THE UREA NITRATE CONTENT IN THE LEACHING SOLUTION ON THE GRANITE WEIGHT DECREASE AND THE FLUORIDE ION CONCENTRATION
1Korovin V.Yu., 2Pohorielov Yu.M.,1Shestak Yu.G., 1Valiaiev O.M.
1M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine, 2Dnipro State Technical University
UDC 504.5:629.36
Language: English
Abstract. The paper presents the results of the study on the impact of the initial concentration of urea nitrate and fluoride ion in the leaching solution on the weight decrease of granite mined at Prydniprovsk Specialized Quarry and the change in the fluoride ion concentration in the solution during intermittent and continuous agitation. During the experiments, we used urea nitrate with weight fraction of nitrate acid 41.5%, urea - 44.3%, water - 14.2%, and ammonium fluoride-bifluoride (fluorine content was 61.2%). Fluoride ion concentration was measured using a fluoride-selective electrode relatively a saturated silver chloride half-cell while the acidity of solutions was measured by titrimetry. Weight decrease was studied for a granite sample, grain fraction -2.0 + 1.0 mm, during intermittent stirring depending on the initial concentration of urea nitrate 0.25 g/dm3, 0.5 g/dm3, and 1.0 g/dm3 and fluoride ion 2.81×10-2 g/dm3 to 3.20×10-1 g/dm3 with intermittent stirring at a temperature of 20±2 °C for 7 days. The data on the change in sample weight depending on the initial concentration of fluoride ion and addition of urea nitrate were received. It was revealed that the decrease in the fluoride ion concentration ambiguously depended on the initial concentration of both urea nitrate and fluoride ion. In our opinion, the fluoride ion concentration decrease occurred with adding urea nitrate due to the fact that nitric acid urea could form adducts with both sulfuric and fluoric acids resulting in the decrease of their reactivity. We have studied the decrease of the granite sample weight and the change in the fluoride ion concentration under continuous stirring and at a temperature of 30±2 °C for 4 days. It was found that the change in the sample weight and concentration of fluoride ion during continuous stirring differed from the similar data obtained during intermittent stirring due to more intensive formation of urea nitrate adducts with sulfuric and fluoride acids. The initial dissolution rate was calculated for a granite sample, its value was 2.384×10-7 s-1 after adding urea nitrate and 2.299×10-7 s-1 without its addition.
Keywords: granite, urea nitrate, ammonium bifluoride, weight decrease, fluoride ion.
REFERENCES
1. Gulyuta, M.A., Andreev, V.A., Buinovskiy, A.S., Makaseev, Yu.N., Molokov, P.B., Sofronov, V.L., and Ivanov, Z.S. (2014), “Research of Activation of Persistent Uranium Ores by Ammonium Fluoride Solutions”, Bulletin of the Tomsk Polytechnical University, vol. 324, no. 3, pp. 53–59.
2. V.Yu. Korovin, Yu.M. Pohorielov, Yu.G. Shestak, and O.M. Valiaiev (2022), “Impact of the Fluoride Ion and Sulfuric Acid Content in Leaching Solution on the Granite Weight Decrease”, Geo-Technical Mechanics, no. 160, pp. 142–153. https://doi.org/10.15407/geotm2022.160.141
3. Baranov, V.A., Mametova, L.F., and Korovin, V.Yu. (2020), “Modelling of Metasomatosis in Radiogenic Rocks as a Factor of Transformation of Their Properties”, Geophysical Journal, vol. 42, no. 1, pp. 86–95. https://doi.org/10.24028/gzh.0203-3100.v42i1.2020.195478
4. Babak, M.I., Koshik, Yu.I., Avdeev, O.K., Bezrodnyi, S.A. and Saveliev, Yu. Ya. (2001), “Dobycha I Pererabotka Uranovykh Rud v Ukraine” [Uranium Ore Mining and Processing in Ukraine], in Chernov, A.P.(ed.), ADEF-Ukraina, Kyiv, Ukraine.
5. Verkhovtsev, V.G., Lisichenko, G.V., Zabulonov, Yu.L., and Vozniak, D.K. (2014), “Perspektivy rozvytku uranovoyi syrovynnoyi bazy yadernoyi energetyky Ukrayiny” [Prospects for the Development of Uranium Resource Base of Nuclear Power of Ukraine], Scientific Book Project. Naukova Dumka, Kyiv, Ukraine.
6. Skrypko, M.M., Korovin, Yu.F., Korovin. V.Yu., Pohorielov Yu.M., Merkulov V.A. and Rozhkov, E.M. «Rekord LLC» (2010), Sposib vyluchennia uranu [Uranium recovery method], State Register of Patents of Ukraine, Kiev, UA, Pat. № 49189.
7. Skrypko, M.M., Korovin, Yu.F., Korovin. V.Yu., Ivanov, A.Zh. and Pohorielov Yu.M., «Rekord LLC» (2005), Sposib oderzhannia vazhkozaimystogo azontokyslogo karbamidu [Production method for highly flammable urea nitrate], State Register of Patents of Ukraine, Kiev, UA, Pat. № 7700.
8. Skrypko, M.M., Korovin, Yu.F. and Korovin. V.Yu. «Rekord LLC» (2007), Sposib utylizatsii azotnokyslykh rozchiniv I filtrativ [Utilization method for nitric solutions and filtrates], State Register of Patents of Ukraine, Kiev, UA, Pat. № 77721.
9. Valyaeva, E.V., Korovin Yu.,F., Pogorelov, Yu.G., Korovin, V.Yu., Shestak, Yu.G., Barkova, V.V. and Skripko, N.N. (2011), “The Study into the Laws Governing the Nitrate Carbamide Recovery from Nitric Acid Solutions Used in the Zirconium Production Process”, Cooperation to Solve the Waste Problems: VIII International Conference, Kharkov, Ukraine, February 23–24, 201, Conference proceedings, https://waste.ua/cooperation/2011/theses/index.html
10. Midgley, D., and Torrans, K. (1980), Potentsiometricheskiy Analiz Wody [Potentiometric Water Analysis], Translated by Kahan, B.B., in Mairanovskiy, S.G. (ed.), Mir Publ., Moscow, USSR.
11. Korovin, V.,Valiaiev, O, Zontov, O., Zontona, L., Pilchyk, V. and Pysmennyi, B (2019), “Uranium (VI) Sorption from Sulphuric Solutions by AM-p-2 Anionite”, Essays of Mining Science and Practice 2019, E3S Web of Conferences, Dnipro, Ukraine, 09 July 2019, pp.1–8. https://doi.org/10.1051/e3sconf/201910900039
12. Zelikman, A.N., Voldman, G.M., and Beliaevaksya, L.V. (1983), “Teoriia gidrometallurgicheskikh protsessov” [Hydrometallurgical Process Theory], Metallurgiia, Moscow, USSR.
About authors:
Korovin Vadym Yuriiovych, Candidate of Chemical Sciences (Ph.D.), Head of Laboratory of New Technologies for Raw and Industrial Waste Processing, Department of Elastomeric Component Mechanics in Mining Machines, M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine (IGTM of the NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.
Pohorielov Yurii Mykolaiovych, Senior Researcher at Sorbent Scientific and Pedagogic Center, Dnipro State Technical University under the Ministry of Education and Science of Ukraine (DSTU of MES of Ukraine), Kamianske, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.
Shestak Yurii Hryhorovych, Senior Engineerin in Laboratory of New Technologies for Raw and Industrial Waste Processing, Department of Elastomeric Component Mechanics in Mining Machines, M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine (IGTM of the NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.
Valiaiev Oleksandr Mykhailovych, Engineer in Laboratory of New Technologies for Raw and Industrial Waste Processing, Department of Elastomeric Component Mechanics in Mining Machines, M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine (IGTM of the NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.