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Refractory materials
ArticleName Study of aluminosilicate refractories after operation in the presence of fluorine-containing wastes
DOI 10.17580/cisisr.2022.01.18
ArticleAuthor E. A. Sidorina, A. Z. Isagulov, I. D. Kashcheev, K. G. Zemlyanoy
ArticleAuthorData

Karaganda Technical University named after Abylkas Saginov, Karaganda, Republic of Kazakhstan:

E. A. Sidorina, Doctoral Candidate, e-mail: elena.sidorina.78@mail.ru
A. Z. Isagulov, Dr. Eng., Prof., Executive Director

 

Ural Federal University, Ekaterinburg, Russian Federation:

I. D. Kashcheev, Dr. Eng., Prof., Dept. of Chemical Technology of Ceramics and Refractories, Institute of New Metallurgical Technologies
K. G. Zemlyanoy, Cand. Eng., Associate Prof., Dept. of Chemical Technology of Ceramics and Refractories, Institute of New Metallurgical Technologies, e-mail: kir77766617@yandex.ru

Abstract

Samples of aluminosilicate refractory after operation in the shaft and in the hearth of a coke-gas cupola were investigated; this cupola was used for smelting of cast iron with spheroidal graphite using carbon wastes from aluminium electrolysis production as a reducing agent. Use of only fluorine-containing carbon wastes as a solid fuel in cast iron production allows to utilize hazardous man-caused wastes, improves the economic performance of production and has influence on resistance of fireclay refractories. It was established that the products acquire a distinct zone features during the service, due to penetration of the components of gas and liquid phases and the effect of low-boiling components of carbon-containing wastes. Upon that, changes in the structure along the distance from the working space are complex ones in lining thickness and in concentration of volatile components in the “cold” parts of the lining. Permanent character of the mullite content in different zones of fireclay products can be traced, as well as a slight increase in the less altered zone, despite the different service conditions. Absence of alkaline and fluoride phases in the zones of refractory products in the pores and structure of the fireclay refractory was established, due to migration of these gaseous phases into the working space of the cupola with their subsequent removal with furnace gases. Additional development of mullite in certain zones of refractory was revealed, resulting by its synthesis from alumina that did not react during fireclay refractories manufacture under the mineralizing action of a fluorine compound. Use of fluorine-containing carbonaceous wastes as a solid fuel in cast iron production makes it possible to utilize hazardous man-caused wastes, improves the economic performance of production and has slight effect on resistance of aluminosilicate refractories in the conditions of a coke-gas cupola.

keywords Cupola, nodular cast iron, fireclay, fluorine-containing carbon wastes, refractory properties, utilization of hazardous wastes, porosity, apparent density, refractory microstructure, glass phase, mullite, secondary phases
References

1. Grigoryev V. M., Zhatchenko Ya. V. Cast iron remains the prospective alloy for brake blocks. Transport Aziatsko-Tikhookeanskogo regiona. 2016. No. 1 (6). pp. 12-15.
2. Sain P. K., Sharma C. P., Bhargava A. K. Microstructure Aspects of a Newly Developed, Low Cost, Corrosion-Resistant White Cast Iron. Journal Metallurgical and Materials Transactions A. 2013. No. 44F. pp. 1665-1671.
3. Abbasi-Khazae B., Ghaderi S. A Novel Process in Semi-Solid Metal Casting. JU. Mater. Technol. 2012. Bol. 28. No. 10. pp. 946-950.
4. Matyulhin V. I., Matyukhina A. V. Calculation and designing of a cupola complex for cast iron melting: A manual. Ekaterinburg : Uralskiy federalnyi universitet imeni B. N. Eltsina. 2015. 364 p.
5. UMMC. Coal market (Analytical report). The results of the 1st quarter 2021. Available at: https://ugmk.com/upload/medialibrary/96a/Obzor-rynka-uglya_1-kv-2021.pdf. (Access date: 02.08.2021).
6. Information agency Metaltorg.ru. Metallurgical coke for blast furnaces. Available at: https://www.metaltorg.ru/metal_catalog/metallurgicheskoye_syrye_i_polu-fabrikaty/koks/coke/. (Access date: 02.08.2021).
7. Ndlow S., Simate G. S., Matinde E. Waste Production and Utilization in the Metal Extraction Industry. CRC Press, 2017. 512 p.
8. Rahmawati, F., Prasasti, B.L.W., Mudjijono, M. Graphene Oxide from Carbon Rod Waste. IOP Conference Series: Material Science and Engineering. 2018. Vol. 333. 012012. DOI: 10.1088/1757-899X/333/1/012012.
9. Bazhin V. Yu., Vlasov A. A., Patrin R. K. Utilization of mancaused wastes from aluminium electrolysis production. Bezopasnost zhiznedeyatelnosti. 2010. No. 9. pp. 18-21.
10. Patrin R. K., Sizyakov V. M., Bazhin V. Yu. Prospects of pyrometallurgical processing of man-caused wastes in aluminium production. Izvestiya vuzov. Tsvetnaya metallurgiya. 2013.
No. 6. pp. 61-63. 11. Ivankov S. I., Troitskiy A. V. Patented technological solutions for processing and utilization of large-tonnage wastes in aluminium production. Nauchnye i tekhnicheskie aspekty okhrany okruzhayushchey sredy. 2020. No. 3. pp.38-102.
12. Gu Yanxin. Recycling and re-use of a spent cell base: Practice of usage in China. Light Metals. 1994. No. 1. pp. 269-273.
13. Hubbard C. R., Evans E. H., Smith D. K. The Reference Intensity Ratio for Computer Simulated Powder Patterns. J. Appl. Cryst. 1976. Vol. 169. No. 9. pp. 169-174.
14. Kashcheev I. D., Strelov K. K., Mamykin P. S. Chemical technology of refractories. Moscow : Intermet, Inzhiniring. 2007. 752 p.

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