APPARATUS AND METHOD FOR CLASSIFYING AND DEDUSTING GRANULAR POLYSILICON

The invention relates to a method for classifying and dedusting polysilicon granular material, wherein the polysilicon granular material 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...

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Bibliographic Details
Main Authors ENGGRUBER, ROBERT, BRIXEL, MARTIN, FRICKE, MICHAEL, HAUSWIRTH, RAINER
Format Patent
LanguageEnglish
French
Published 20.10.2016
Subjects
CHEMISTRY
COMPOUNDS THEREOF
INORGANIC CHEMISTRY
METALLURGY
NON-METALLIC ELEMENTS
OTHER SEPARATING BY DRY METHODS APPLICABLE TO BULK MATERIAL,e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
PERFORMING OPERATIONS
SEPARATING SOLIDS FROM SOLIDS
SEPERATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, ORSIFTING OR BY USING GAS CURRENTS
SORTING
TRANSPORTING
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Summary:The invention relates to a method for classifying and dedusting polysilicon granular material, wherein the polysilicon granular material 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 polysilicon granular material by means of a projectile motion of the polysilicon granular material 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 a device suitable for performing the method.
Bibliography:Application Number: CA20162974255