CALCULATION OF MELTING CURVES OF MULTI COMPONENT SILICATE SYSTEMS

DOI: 10.6060/tcct.20165911.5377
Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2016. V. 59. N 11. P. 50-54

The work is devoted to the study of non-equilibrium processes of melting silicate sys-tems with varying silica content from 50 to 99%. The calculation of the melting curves of ma-terials based on the actual chemical composition and determination of their melting tempera-ture using state diagrams was carried out. Melting curves were constructed for the analysis of non-stationary processes investigated raw materials using a consistent method of melting eu-tectics and their comparison with the melting curves, created by traditional method whereby the conversion to the ternary system. Principles of the melting curves for materials taking into account their actual chemical composition are reduced to consider all options for the binary and ternary systems included in the studied multicomponent. Further eutectic arranged to in-crease the melting temperature and the amount of liquid phase is determined for each of them. With increasing temperatures the formation of the liquid phase is not due to eutectic melting followed by dissolution refractory components. According to calculations, the melting point of the raw material increases with the content of silicon oxide It was confirmed by ex-perimental research by comparison of the phase diagrams of equilibrium processes and by the formation of a melt of multi-component systems and their real chemical composition. It was found that during slow heating rates both in the real and in model systems the increase in the liquid phase is carried out by melting eutectics and further by melting the refractory com-ponents. The melting experiments carried out on silicate systems using the plasma energy (fast blend heating) revealed the melt preparation connects with the simultaneous melting of all phases.

Key words: silicate raw materials, silicate melt, state diagrams, melting curves, melting point

REFERENCES
1. Kilimnik A.B. Physical chemistry. Tambov: Publishing House of the Thumb. State. Tekhn. University Press. 2008. 108 p. (in Russian).
2. Volokytin O.G., Vereshchagin V.I., Shekhovtsov V.V. Processes of obtaining a melt from quartz sand aggregates in the low-temperature plasma. Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2015. V. 58. N 1. P. 62-65 (in Russian).
3. Makhova M.F., Dzhigiris D.D. Fundamentals of production of basalt fibers and products. M.: Teploenergetik. 2002. 170 p. (in Rus-sian).
4. Peschenko A.D., Mychko D.I. Oil shale of Belarus: resources and perspectives. Khimiya: prablemy vykladannya. 2011. N 8. P. 3-13 (in Belarusian).
5. Rikhvanov L.P., Kropanin S.S., Babenko S.A. Zircon-ilmenite placer deposits as a potential source of development of the West Siberian region. Kemerovo: OOO "Sarae". 2001. 214 p. (in Russian).
6. Physical chemistry of silicates. Ed. A.A. Pashchenko. M.: Vyssh. shk. 1986. 368 p.(in Russian).

2016, Т. 59, № 11, Стр. 50-54

Purchase

You will get the pdf-copy of your article by e-mail