Device for purifying polysilicon by shell melting method, and method

The invention discloses a device for purifying polysilicon by adopting shell melting technology, which comprises a water cooling vacuum hearth, annularly arranged water cooling copper pipes, a water cooling base plate with a lifting device, a plasma torch, a feeder and ultrahigh frequency induction...

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Bibliographic Details
Main Authors HE XUEMEI, ZHAN ZONGGUI, LI DUOJIA, CHEN QINGHAN, GAO SHANGJIU, XU JIAYUE, ZHANG DAOBIAO
Format Patent
LanguageChinese
English
Published 11.05.2011
Subjects
CHEMISTRY
COMPOUNDS THEREOF
INORGANIC CHEMISTRY
METALLURGY
NON-METALLIC ELEMENTS
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Summary:The invention discloses a device for purifying polysilicon by adopting shell melting technology, which comprises a water cooling vacuum hearth, annularly arranged water cooling copper pipes, a water cooling base plate with a lifting device, a plasma torch, a feeder and ultrahigh frequency induction heating coils. The invention also discloses a method for manufacturing solar-grade polysilicon, which comprises the following steps of: forming a solid silicon shell-melting crucible, performing ultrahigh frequency and ultrahigh temperature vacuum melting and plasma atmosphere refining on silicon raw materials in the shell-melting crucible, and performing directional solidification.
Bibliography:Application Number: CN20091216154