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Название Kinetics of high-temperature hydrochloric leaching of kaolin clays of east-siberian deposits in laboratory conditions and pilot plant tests
DOI 10.17580/tsm.2018.03.06
Автор Balmaev B. G., Kirov S. S., Pak V. I., Ivanov M. A.
Информация об авторе

A. A. Baikov Institute of Metallurgy and Material Science RAS, Moscow, Russia:

B. G. Balmaev, Leading Researcher, Laboratory of Physical Chemistry and Aluminium Technology, e-mail: 3.boris@gmail.com


National University of Science and Technology “MISiS”, Moscow, Russia:
S. S. Kirov, Assistant Professor, Chair of Non-ferrous Metals and Gold, e-mail: kirovss@list.ru
V. I. Pak, Post-Graduate Student, Chair of Non-ferrous Metals and Gold, e-mail: pakvi@misis.ru
M. A. Ivanov, Post-Graduate Student, Chair of Non-ferrous Metals and Gold, e-mail: ivanov@misis.ru


Our paper studies the kinetic regularities of autoclave leaching of kaolin clays of East Siberian deposits with hydrochloric acid in laboratory conditions and pilot plant tests. A probabilistic-deterministic mathematical model of hydrochloric acid leaching is constructed, which allows to predict the best parameters of the process. Laboratory studies on the leaching of kaolin clays with hydrochloric acid were carried out in 50 ml ampoule autoclaves. Investigations in the pilot plant tests were carried out in a 27 l autoclave with impeller stirrer. The dependence of the reaction rate of the reaction of kaolin clay with hydrochloric acid on temperature was obtained. The values of the activation energy and reaction order for HCl are determined, showing that under laboratory conditions the process goes on in the transition region, and in the pilot plant tests – in diffusion. Dependences of extraction of Al2O3 in solution on the rate of mixing were obtained. An increase in the speed of rotation of the mixer from 30 to 90 rpm helps to increase the extraction of alumina into the solution from 91% to 92.82%. A constructed mathematical model of the process of leaching of kaolin clays with hydrochloric acid adequately describes the process, which is confirmed by both statistical criteria and control experiments and minimizes technological risks in the subsequent industrial introduction of the technology.
This work was carried out with the sponsorship of the Ministry of Education and Science of the Russian Federation within the fulfilment of the subsidiary agreement engagements on November 2nd 2015, No. 14.581.21.0019 (unique ID: RFMEFI58115X0019).

Ключевые слова Hydrochloric acid leaching, high-silicon raw materials, kaolin clay, alumina chloride solution, laboratory studies, pilot plant tests, probabilisticdeterministic mathematical model, kinetics, influence of various factors, activation energy
Библиографический список

1. Balmaev B. G., Pak V. I., Ivanov M. A., Smirnov A. A. Testing of experimental complex of acid obtaining of alumina from high-silica aluminium raw materials. Thesises of reports of the 9th international congress “Non-ferrous metals and minerals”. Krasnoyarsk, 11–15 September 2017. pp. 184, 185.
2. Pat. No. 109:8893 CAN. Production of a Purified Alumina-Silica Product and Substantially Pure Aluminum Chloride from Iron-Containing Bauxites, Bauxitic Clays, Kaolinitic Clays and Mixtures Thereof. Weston D. 1988.
3. Park K. Y., Jeong J., Choi Y. K., Kang T. W. Kinetic Study on the Extraction of Aluminum from Clay by Hydrochloric Acid. Hwahak Konghak. 1992. No. 30 (4). pp. 509–516.
4. Al-Zahrani A. A., Abdul-Majid M. H. Extraction of Alumina from Local Clays by Hydrochloric Acid Process. JKAU: Engineering Science. 2009. Vol. 20, No. 2. pp. 29–41.
5. Regina O. Ajemba, Okechukwu D. Onukwuli. Kinetic Model for Ukpor Clay Dissolution in Hydrochlorlc Acid Solution. Journal of Emerging Trends in Engineering and Applied Sciences (JETEAS). Scholarlink Research Institute Journals. 2012. No. 3 (3). pp. 448–454.
6. Lima P. A., Angélica R., Neves R. Dissolution kinetics of Amazonian metakaolin in hydrochloric acid. Clay Minerals. 2017. No. 1. pp. 75–82.
7. Safiev Kh., Boboev Kh. E., Gaydaenko N. V. Acid decomposition of preliminary annealed kaolin clays in Tajikistan. Doklady AN Respubliki Tadzhikistan. 1995. No. 5-6. pp. 67–70.
8. Lapteva E., Yusupov T. S., Berger A. S. Physical and chemical changes of layered silicates during mechanical activation. Novosibirsk : Nauka, 1981. 88 p.
9. Pat. 3816605 (A) US. Method of processing aluminum-containing ores. Belsky M. Published: 11.06.1974.
10. Bremner P. R., Eisele J. A., Bauer D. J. Rept. Invest. Bur. Mines. U.S. Dep. Inter. 1982. No.8694. 3 p.
11. Mahi P., Bailey N. T. Extraction of iron from aluminiferous chloride leach solutions by alamine 336. Chemistry and Industry (London). 1984. Vol. 1. P. 18–21.
12. Balmaev B. G., Tuzhilin A. S., Kirov S. S., Shebalkova A. Yu. Mathematical modelling and optimization of aluminium hydroxychloride obtaining process. Tsvetnye Metally. 2017. No. 3. pp. 57–62.
13. Balmaev B. G., Kirov S. S., Ivanov M. A., Pak V. I. Filtration process modeling for aluminium-bearing hydrochloric acid pulp. Tsvetnye Metally. 2017. No. 10. pp. 63–68.
14. Protodyakonov M. M., Teder R. I. Method of rational planning of experiment. Moscow : Nauka, 1970. 74 p.
15. Malyshev V. P. Probabilistic and deterministic image. Karaganda : Gylym, 1994. 370 p.
16. Shmitko E. I., Krylova A. V., Shatalova V. V. Chemistry of cement and astringent substances : tutorial. Voronezh : VGASU, 2005. 164 p.
17. Sokolova T. A., Dronova T. Ya., Tolpeshta I. I. Clay minerals in soils. Tula : Grif i K, 2005. 336 p.
18. Klepikov M. S., Shcherbakov A. A., Viktorov V. V. Effect of hydrothermal treatment kaolin of Poletaevskoe deposits on their chemical and phase composition. Bashkirskiy khimicheskiy zhurnal. 2013. No. 2. pp. 31–33.
19. Voldman G. M., Zelikman A. N. Theory of hydrometallurgical processes tutorial for universities. 4th edition, revised and enlarged. Moscow : Intermet Inzhiniring, 2003. 464 p.
20. Dyachenko A. N., Shagalov V. V. Chemical kinetics of heterogeneous processes : tutorial. Tomsk : Izdatelstvo Tomskogo politekhnicheskogo universiteta, 2014. 102 p.
21. Andreev G. G., Dyachenko A. N., Permyakov O. E. Study system on chemical heterogeneous kinetics. Tomsk : Izdatelstvo TPU, 2008. 120 p.

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