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    • 6. 发明公开
    • METHOD FOR PREPARING HIGH SPHERICITY SEED CRYSTAL AND FLUIDIZED BED PARTICLE SILICON
    • 工艺生产高种子球形和流化床颗粒硅
    • EP2883613A1
    • 2015-06-17
    • EP13829331.1
    • 2013-08-13
    • Jiangsu Zhongnen Polysilicon Technology Development Co., Ltd.
    • MIXON, DavidNELAN, Christopher
    • B02C4/30B01J8/24C01B33/00
    • B02C4/32B02C4/02B02C4/286B02C23/16B02C23/18B02C23/24C01B33/021
    • The present invention discloses a method for generating high sphericity seed for the operation of a fluidized bed reactor to produce granular polysilicon. The method comprises: using fluidized bed granular silicon as a raw material, passing through a roll crusher apparatus to fracture, the roll crusher apparatus comprises at least one set of rollers, by adjusting the roller gap width between the sets of rollers, the silicon particles which size larger than the roller gap width are crushed, the silicon particles which size smaller than the roller gap width directly pass through the gap, thereby generating the high sphericity seed, then recycle back into fluidized bed reactor for reaction and generate granular silicon. According to the present invention, the generating seeds have a high sphericity and narrow PSD, compared to the low sphericity seeds, the porosity of the FBR in present invention is lower, and easier to avoid the formation of silicon powder and other negative impact.
    • 本发明盘松动的产生高球形种子的流化床反应器的外科手术,以产生粒状多晶硅的方法。 该方法包括:使用流化床颗粒状硅作为原料,经过辊式破碎机装置破裂,辊式破碎机装置包括辊子的至少一组,通过调整组辊,该硅颗粒之间的辊隙宽度 其尺寸比辊间隙宽度大被压碎,硅颗粒,其尺寸比辊间隙较小宽度直接穿过间隙,由此生成高球形种子,然后再循环回到流化床反应器以进行反应并生成粒状硅。 。根据本发明,产生的种子具有高的球度和窄PSD相比低球形种子,所述FBR的在本发明的气孔率较低,更容易避免硅粉末和其它负面影响的形成。