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https://doi.org/10.53939/15605655/2022_3_56

Dantaeva A.Z., Ibraev M.B., Sultamurat G.I.

Abstract. The theoretical foundations of the recovery process and the technology of silicon smelting in electric arc furnaces are considered. The results of a study of thermodynamics, reaction kinetics, and mechanisms of the melting process are presented. Production issues are covered: charge preparation, smelting, refining, gas purification. Physicochemical models of the carbothermal process were developed, proposed and tested under industrial conditions (Tau-Ken-Temir LLP), which made it possible to assess the influence of the specified technological parameters of the smelting (chemical composition and loading coefficients of charge components, temperature) on silicon recovery and grade. To obtain the base material, metallurgical grade silicon is used, obtained by melting in ore-thermal furnaces (RTP). In this regard, the research goal is determined, which consists in studying ways to improve the quality (chemical purity) of silicon, and methods for achieving it at this stage of the study – modeling the carbothermal process for producing silicon.The article describes the main mechanism for the recovery of silica in the furnace, presents one of the designs of the furnace and the technological scheme for the production of silicon. The author suggested studying the process of producing metallurgical silicon in RTP using the HSC Chemistry software package. A model of silicon smelting in RTP was formed, which adequately describes the technological process for producing metallurgical silicon.
Keywords: quartz, charcoal, silicon carbide, silica, ore-thermal furnace, thermodynamics, Gibbs energy.

References
1. Vidy` rafinirovaniya kremniya Popov A.A. 1, Bel`skij S.S. 2 Pererabotka prirodnogo i tekhnogennogo sy`r`ya.Sbornik nauchny`kh trudov studentov, magistrantov, aspirantov i molody`kh ucheny`kh Instituta metallurgii i khimicheskoj tekhnologii im. S.B. Leonova. – Irkutsk: Izd-vo IRNITU, 2016. s.46.
2. Tekhnologicheskij reglament po proizvodstvu tekhnicheskogo kremniya TOO «Tau-KenTemir».
3. Chernyakhovskij L.V., Nemchinova N.V., Klyocz V.E`. Primenenie okuskovaniya komponentov shikhty` pri vy`plavke kremniya // Materialy` Mezhdunar. nauch.-tekhn. konf. molody`kh speczialistov i ucheny`kh alyuminievoj, magnievoj i e`lektrodnoj promy`shlennosti (22-24 noyab. 1999 g., Sankt-Peterburg). SPb, 1999. S. 48-49.
4.Optimizacziya proczessa karbotermicheskogo polucheniya kremniya v e`lektrodugovy`kh pechakh L.V. Chernyakhovskij , M.N. Ry`bina. Pererabotka prirodnogo i tekhnogennogo sy`r`ya.Irkutsk: Izdvo IRNITU, 2016. s.189.
5. ArkhipovS.V., Tupiczy`nA.A., KatkovO.M., RushE.A., Sedy`khI.M. – Pod. red. Katkova O.M. Irkutsk: Kremnij, 1999. — 244 s.: il.
6. Fiziko-khimicheskoe modelirovanie karbotermicheskogo polucheniya kremniya vy`sokoj chistoty` / Nemchinova N.V., Klyocz V.E`., Vel`skij S.S. [i dr.] // Sovremenny`e problemy` nauki i obrazovaniya. M.: Akademiya estestvoznaniya, 2007. URL: http://www.science-ediication.ru/download /2007/03 /08.pdf. (data obrashheniya: 06.11.2008).
7. Nemchinova N.V., Klyocz V.E`. Optimizacziya karbotermicheskogo proczessa polucheniya kremniya v e`lektrodugovy`kh pechakh // Czvetny`e metally`. 2010. № 3. S. 98-102.
8. Nemchinova N, Kloytz V. Thermodynamic modeling of silicon smelting to improve its quality // Silicon for the Chemical and Solar Industry IX: proc. of the Intern. Scientific conf. (23-26 June 2008, Oslo -Nonvay). Trondheim, 2008. P. 25-36.
9. Katkov O.M. Vy`plavka tekhnicheskogo kremniya : ucheb. posobie / pod red. O.M. Katkova. – 2-e izd. – Irkutsk : Izd-vo IrGTU, 1999. – 243 s.
10.Karpov I.K. Fiziko-khimicheskoe modelirovanie na E`VM v geokhimii / pod obshh. red. I.K. Karpova. – Novosibirsk : Nauka, 1981. – 247 s.
11. E`lektrotermicheskoe oborudovanie: Spravochnik / Pod obshh. red. A. P. Al`tgauzena, M. Ya. Smelyanskogo, M. S. Shevczova. M.: E`nergiya, 1967. -448 s.