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公开(公告)号：US09296616B2
公开(公告)日：2016-03-29
申请号：US13888518
申请日：2013-05-07
申请人： Wacker Chemie AG
IPC分类号： C01B33/02 , C23C16/24 , C23C16/442 , C01B33/03
CPC分类号： C01B33/02 , C01B33/03 , C01P2002/90 , C01P2004/03 , C01P2004/45 , C01P2004/50 , C01P2006/12 , C01P2006/80 , C23C16/24 , C23C16/442 , Y10T428/2982
摘要： Granular polycrystalline silicon includes a compact matrix including radiating acicular crystal aggregates of crystal size from 0.001-200 μm. A process for producing granular polycrystalline silicon includes producing granular silicon in a fluidized bed reactor from a gas mixture containing TCS (20-29 mol %) and hydrogen at a fluidized bed temperature of 900-970° C., dividing the granular silicon in a screen system having at least one screen deck into at least two screen fractions, the smallest screen fraction being ground in a grinding system to give seed particles having a size of 100-1500 μm and a mass-based median value from 400 to 900 μm, and these seed particles being supplied to fluidized bed reactor, and a further screen fraction being supplied to a fluidized bed reactor, and being surface-treated with a gas mixture containing TCS (5.1-10 mol %) and hydrogen at a fluidized bed temperature of 870-990° C.
摘要翻译： 颗粒状多晶硅包括紧凑的基体，其包括晶体尺寸为0.001-200μm的针状结晶聚集体。 一种生产颗粒状多晶硅的方法包括在流化床反应器中由流化床温度为900-970℃的TCS（20-29mol％）和氢气的气体混合物制备颗粒状硅，将粒状硅分成 屏幕系统具有至少一个屏幕甲板，至少两个屏幕分数，最小屏幕分数在研磨系统中研磨以得到尺寸为100-1500μm和基于质量的中值为400至900μm的种子颗粒， 并将这些种子颗粒供应到流化床反应器，并将另外的筛分部分供入流化床反应器，并在流化床温度为TCS（5.1-10mol％）和氢气的气体混合物进行表面处理 870-990℃
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公开(公告)号：US10537899B2
公开(公告)日：2020-01-21
申请号：US15316931
申请日：2015-06-02
申请人： Wacker Chemie AG
IPC分类号： B02C19/06 , C01B33/021 , C04B35/56
摘要： Silicon seed particles which can be used for producing polycrystalline silicon granules in a fluidized-bed reactor are prepared by a process wherein a milling gas stream is introduced into a chamber containing polycrystalline silicon granules, as a result of which individual particles of the polycrystalline silicon granules are accelerated in such a manner that they collide with other particles of the polycrystalline silicon granules, and in this manner the polycrystalline silicon granules are comminuted, wherein the milling gas stream is introduced into the chamber by at least one jet nozzle made of hard metal.
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公开(公告)号：US10118830B2
公开(公告)日：2018-11-06
申请号：US15109556
申请日：2014-12-11
申请人： Wacker Chemie AG
发明人： Rainer Hauswirth , Robert Enggruber
摘要： Segregation of silicon granules in the fluidized bed production of polycrystalline silicon is achieved by successively transferring granular polycrystalline silicon through a plurality of vessels designed for funnel flow of granular material. The transfers may occur prior to introduction of feed particles into the reactor, or the enlarged granules from the reactor may be thus transferred to improve product size uniformity.
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公开(公告)号：US10589318B2
公开(公告)日：2020-03-17
申请号：US14917677
申请日：2014-08-07
申请人： Wacker Chemie AG
发明人： Andreas Schneider , Peter Gruebl , Rainer Hauswirth , Reiner Pech
摘要： A method for mechanically classifying polycrystalline silicon chunks or granules with a vibratory screening machine, involves setting silicon chunks or granules present on one or more screens each comprising a screen lining in vibration such that the silicon chunks or silicon granules perform a movement which causes the silicon chunks or silicon granules to be separated into various size classes, wherein a screening index is greater than or equal to 0.6 and less than or equal to 9.0.
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公开(公告)号：US10335832B2
公开(公告)日：2019-07-02
申请号：US15566702
申请日：2016-04-01
申请人： Wacker Chemie AG
IPC分类号： B07B4/08 , B07B11/04 , C01B33/037 , B07B11/06 , B07B13/16
摘要： Granular polysilicon is fed into a screening plant, divided into two or more fractions by means of one or more screen surfaces, and thereby classified and dedusted wherein a throwing motion of the granular polysilicon in the screening plant removes adhering dust particles from the granular polysilicon, the removed dust particles are taken off from the screening plant by means of a gas flow supplied to the screening plant, and the screening plant is of gas-tight design and supply and takeoff of the gas flow are effected such that the screening plant is at a positive pressure compared to the surroundings.
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