






Vol.3 , No. 5, Publication Date: Sep. 13, 2016, Page: 74-88
[1] | Petrov Stanislav, The Gas Institute of the National Academy of Sciences of Ukraine, Kyiv, Ukraine. |
[2] | Korzhyk Volodymyr, The E. O. Paton Electric Welding Institute of the National Academy of Sciences of Ukraine, Kyiv, Ukraine. |
The continuous technological process of «solar» silicon production by the method of plasma pyrolysis of monosilane is investigated. The time of decomposition, e.g. at 1800°C, is 210-5 s. At a plasma velocity of about 1000 m/s, decomposition of monosilane will take place at a distance of 2 cm. The energy consumption: at useful plasmatron power W = 100 kW, volume ratio VAr/VH2 = 0.2/0.8 and reaction zone length L = 0.06 m, we obtain that min QSi = 1.69 kWh/kg Si, GSi = 50 kg/h Si. Considered was the problem of modelling of the steady-state process of cooling and condensation of silicon vapours and molten silicon droplets produced as a result of interaction of monosilane with a plasma jet. The effect discovered when the condensation reactor is combined with the granulator, i.e. where the processes of condensation of silicon vapours into a liquid film and transformation of flow of this film into the droplet one simultaneously take place on its working surface, leads to formation of a new concept of the condenser – granulator. It is possible to create the high-efficient equipment for continuous production of cheap high-purity silicon with low capital and service expenses basing on this process.
Keywords
Silicon, Plasma, Monosilane, Condensation, Liquid Film, Skull, Granulator
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