HUMIDIFIED SWEEP GAS FOR DEDUSTING PROCESS

• Main Author: GEERTSEN, Robert, J
• Format: Patent
• Language: English; French
• Published: 09.11.2017
• Subjects: CHEMISTRY; COMPOUNDS THEREOF; INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OFSOLID INORGANIC COMPOUNDS; INORGANIC CHEMISTRY; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLIDMATERIALS OR FLUIDS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROMSOLID MATERIALS OR FLUIDS; 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; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS; SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATICTABLES OR JIGS; SEPERATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, ORSIFTING OR BY USING GAS CURRENTS; SORTING; TRANSPORTING

Methods and apparatus for separating polysilicon powder from a mixture of granular polysilicon and polysilicon powder are disclosed. The method includes tumbling the polysilicon material in a tumbling device while flowing humidified sweep gas through the tumbling device. Also disclosed are compositions including granulate polysilicon or polycrystalline silicon, in some examples, including a coating layer consisting essentially of water. L'invention concerne des procédés et un appareil de séparation de poudre de silicium polycristallin à partir d'un mélange de silicium polycristallin granulaire et de poudre de silicium polycristallin. Le procédé comprend le culbutage du matériau de polysilicium dans un dispositif de culbutage tout en faisant circuler un gaz d'entraînement humidifié à travers le dispositif de culbutage. L'invention concerne également des compositions comprenant du polysilicium granulaire ou du silicium polycristallin, dans certains exemples, comprenant une couche de revêtement constituée essentiellement d'eau.