| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing a high-purity silicon pure enough to be used in a solar battery, by the reduction of silicon tetrachloride by zinc gas. SOLUTION: In the manufacturing method, the zinc gas or a zinc-containing gas essentially comprising zinc gas is constantly sent to a reactor to induce a zinc gas atmosphere therein, silicon tetrachloride in a liquid state is introduced to the reactor, a zinc reduction reaction is induced to produce a silicon, and only a reaction product gas is discharged from the reactor at the reactor terminal so that the produced silicon is locally accumulated inside the reactor. A part where the produced silicon is locally accumulated inside the reactor is a silicon melt-retaining tank which is kept at a temperature equal to or higher than the melting point of the silicon. COPYRIGHT: (C)2008,JPO&INPIT
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