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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Main Authors | , , , , , , |
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Format | Patent |
Language | Chinese English |
Published |
11.05.2011
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Subjects | |
Online Access | Get full text |
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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. |
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Bibliography: | Application Number: CN20091216154 |