Title:
SILICON POWDER MANUFACTURING METHOD AND MANUFACTURING APPARATUS USING WASTE SILICON SLUDGE
Document Type and Number:
WIPO Patent Application WO/2024/043458
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide an apparatus and method capable of processing and producing high-purity single-crystal silicon powder recovered through upcycling in an economical manner, the method comprising: a first step of creating an atmosphere with an inert gas so as to remove moisture while suppressing further oxidation of waste silicon to prevent a passivation layer of silicon dioxide from increasing, and breaking up and drying lumps into individual particles; and a second step of decreasing the degree of oxidation of the particles by supplying, in a nitrogen atmosphere, hydrogen (H2) gas for reducing and removing the silicon dioxide passivation layer on the surface of silicon, thereby producing high-purity silicon particles and reducing a certain thickness thereof to SiOx.
Inventors:
NAM WOO-SEOK (KR)
OH EUN-SEOK (KR)
OH EUN-SEOK (KR)
Application Number:
PCT/KR2023/007699
Publication Date:
February 29, 2024
Filing Date:
June 05, 2023
Export Citation:
Assignee:
INNOX ECOM CO LTD (KR)
International Classes:
C01B33/037; H01M4/02; H01M4/38
Foreign References:
| KR20200014737A | 2020-02-11 | |||
| JP2008162813A | 2008-07-17 | |||
| KR20120049001A | 2012-05-16 | |||
| KR102181908B1 | 2020-11-23 | |||
| KR100823666B1 | 2008-04-18 |
Attorney, Agent or Firm:
DAE-A INTELLECTUAL PROPERTY CONSULTING (KR)
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