Title:
APPARATUS AND METHOD FOR CLASSIFYING AND DEDUSTING GRANULAR POLYSILICON
Document Type and Number:
WIPO Patent Application WO/2016/165959
Kind Code:
A8
Abstract:
The invention relates to a method for classifying and dedusting granular polysilicon, wherein the granular polysilicon is fed into a sieve system (1), is divided into two or more fractions by means of one or more sieve surfaces (5), wherein adherent dust particles are removed from the granular polysilicon by means of a projectile motion of the granular polysilicon in the sieve system (1), wherein the removed dust particles are led out of the sieve system (1) by means of a gas flow fed to the sieve system (1), wherein the sieve system is gas-tight and the feeding (6) and removal (7) of the gas flow occur in such a way that there is overpressure in the sieve system (1) in relation to the surroundings, and apparatus suitable for performing the method.
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Inventors:
FRICKE MICHAEL (DE)
BRIXEL MARTIN (DE)
ENGGRUBER ROBERT (DE)
HAUSWIRTH RAINER (DE)
BRIXEL MARTIN (DE)
ENGGRUBER ROBERT (DE)
HAUSWIRTH RAINER (DE)
Application Number:
PCT/EP2016/057246
Publication Date:
July 13, 2017
Filing Date:
April 01, 2016
Export Citation:
Assignee:
WACKER CHEMIE AG (DE)
International Classes:
B07B4/08; C01B33/037
Attorney, Agent or Firm:
POTTEN, Holger et al. (DE)
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