Method of thermochemical activation of aluminum silicate potassium mineral (synnyrite) by using magnesium carbonate

Authors: Gulyashinov P. A., Alekseeva E. N., Budaeva A. D., Antropova I. G. 

The efficient method is developed for the thermochemical activation of rebellious aluminum silicate potassium mineral (synnyrite from Kalyum site of the Synnyr alkaline massif) using an additive of magnesium carbonate (MgCO3) to make K-feldspar component of the initial raw material acid-soluble. It is shown that the basic mineral of synnyrite are microcline and orthoclase

from potash feldspar group (64.2%) with general chemical formula K[AlSi3O8], and a potassic kind of nepheline K[AlSiO4]—calcilite (23.6%). It is found that during thermochemical interaction between synnyrite and magnesium carbonate, decomposition of potassic feldspar (K[AlSi3O8]) takes place with formation of chemically active leucite (K[AlSi2O6]), while silica is bound by magnesium oxide into two magnesium silicate—forsterite (Mg2SiO4). The optimized parameters of synnyrite and magnesium carbonate baking ensure maximum decomposition of K-feldspar component. The developed thermochemical activation method for synnyrite allows reduction in the temperature of thermal treatment with formation of acid-soluble compounds by 100–200 0С as against the known analogs (baking with calcium carbonate—1250–1300 0С; thermal decomposition without additives—1300–1350 0С). Thermochemical activation of synnyrite with magnesium carbonate allows production of magnesium-bearing calcilite–leucite concentrate suitable for the subsequent sulfuric treatment with production of magnesium sulfate in addition to alumina and potassium salts.

Keywords: Synnyrite, magnesium carbonate, potassic feldspar, thermochemical activation, leucite, calcilite.
For citation:

Gulyashinov P. A., Alekseeva E. N., Budaeva A. D., Antropova I. G. Method of thermochemical activation of aluminum silicate potassium mineral (synnyrite) by using magnesium carbonate. MIAB. Mining Inf. Anal. Bull. 2019;(12):180-190. [In Russ]. DOI: 10.25018/0236-1493-201912-0-180-190.

Acknowledgements:

The study was supported in the framework of the Republican Research Contest 2019, Republic of Buryatia.

Issue number: 12
Year: 2019
Page number: 180-190
ISBN: 0236-1493
UDK: 66.040.262.2
DOI: 10.25018/0236-1493-2019-12-0-180-190
Article receipt date: 03.10.2019
Date of review receipt: 11.11.2019
Date of the editorial board′s decision on the article′s publishing: 11.11.2019
About authors:

P.A. Gulyashinov1, Cand. Sci. (Eng.),
Junior Researcher, e-mail: gulpasha@mail.ru,
E.N. Alekseeva1, Leading Engineer, e-mail: styazhkina82@inbox.ru,
A.D. Budaeva1, Junior Researcher, e-mail: abud@binm.ru,
I.G. Antropova1, Cand. Sci. (Eng.), Head of Laboratory, e-mail: inan@binm.ru,
1 Baikal Institute of Nature Management of Siberian Branch
of Russian Academy of Sciences, 670047, Ulan-Ude, Buryatia, Russia.

For contacts:

P.A. Gulyashinov, e-mail: gulpasha@mail.ru.

Bibliography:

1. Sizyakov V. M. Chemical engineering regularities in baling of alkaline aluminum silicates and hydrochemical processing of cakes. Zapiski Gornogo instituta. 2016, no 217, pp. 102—112. [In Russ].
2. Santos W. O., Mattiello E. M., Costa R. F., Abrahão W. A.P. Thermal and chemical solubilization of verdete for use as potassium fertilizer. International Journal of Mineral Processing. 2015;140:72—78. DOI 10.1016/j.minpro.2015.05.003.
3. Silva A. A. S., Medeiros M. E., Sampaio J. A., Garrido F. M. S. Verdete from cedro do abaeté as a source of potassium: characterization, thermal treatment and reaction with CaO. Matéria. 2012;17:1061—1073.
4. Santos W. O., Mattiello E. M., Vergutz L., Costa R. F. Production and evaluation of potassium fertilizers from silicate rock. Journal of Plant Nutrition and Soil Science. 2016;179(4):547—556. DOI 10.1002/jpln.201500484.
5. Jena S. K., Dhawan N., Rath S. S., Rao D. S., Das B. Investigation of microwave roasting for potash extraction from nepheline syenite. Separation and Purification Technology. 2016;161:104—111. DOI 10.1016/j.seppur.2016.01.039.
6. Yuan B., Li C., Liang B., Lü L., Yue H. R., Sheng H. Y., Ye L. P., Xie H. P. Extraction of potassium from K-feldspar via the CaCl2 calcination route. Chinese Journal of Chemical Engineering. 2015;23(9):1557—1564. DOI 10.1016/j.cjche.2015.06.012.
7. Matveev V. A., Mayorov D. V., Brichkin V. N., Gorbunova E. S. Khibiny rischorrite—promising raw material for production of potassium fertilizers, alumina and other stuff. Gornyy informatsionnoanaliticheskiy byulleten’. 2015, Special edition 19, pp. 146—152. [In Russ].
8. Antropova I. G., Alekseeva E. N., Dorzhieva O. U., Gulyashinov P. A., Paleev P. L. General characteristic and development prospects of aluminous deposits in the Republic of Buryatia. Mezhdunarodnyy zhurnal prikladnykh i fundamental'nykh issledovaniy. 2018, no 11 (part 2), pp. 357—362. [In Russ]. DOI 10.17513/mjpfi.12505.
9. Safrygin Yu. S., Stepanova N. I., Filonenko L. A., Polyakovskiy V. Ya., Zakharov V. I. Copyright certificate no 1761671 USSR, MKI5 C 01 F 7/26. 15.09.92.
10. Konstantinova K. K., Nikiforov K. A., Mokhosoev M. V. Copyright certificate no 1421693 USSR, MKI5 C 01 F 7/26. 07.09.1988.
11. Antropova I. G., Alekseeva E. N., Budaeva A. D., Dorzhieva O. U. Thermochemical treatment of ultra potassium aluminum silicate mineral synnyrite using natural magnesium-bearing additives. Obogashchenie rud. 2018, no 6, pp. 14—19. [In Russ]. DOI 10.17580/or.2018.06.03.
12. Shcherbakova T. A., Shevelev A. I. Magnesium carbonate resources and their development prospects in Russia. Georesursy. 2016. Vol. 18, no 1, pp. 75—78. [In Russ]. DOI 10.18599/grs.18.1.14.
13. Tikhonov V. N. Analiticheskaya khimiya magniya [Analytical chemistry of magnesium], Moscow. Nauka, 1973, 256 p.
14. Morachevskiy A. G., Sladkov I. B. Termodinamicheskie raschety v metallurgii: Spravochnik [Thermodynamic calculations in metallurgy: Handbook], Moscow, Metallurgiya, 1993, 137 p.
15. Binnewies M., Mike E. Thermochemical data of elements and compounds. 2002. p. 928.
16. Krasnovskikh M. P., Ketov A. A., Ketov Yu. A., Vaysman Ya. I. Thermal decomposition of magnesium carbonate and dolomite from the Satkin deposit. Vestnik Permskogo universiteta. Khimiya. 2017. Vol. 7, Issue 2, pp. 145—151. DOI 10.17072/2223-1838-2017-2-145-151. [In Russ].
17. Mitina N. A., Lotov V. A. Analysis of change in phase composition, properties and hydraulic activity magnesian materials under thermal treatment. Novye ogneupory. 2017, no 6, pp. 53—59. [In Russ].

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