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    • 6. 发明授权
    • Process for calcination of cement-clinker
    • 水泥熟料煅烧工艺
    • US3964922A
    • 1976-06-22
    • US472326
    • 1974-05-22
    • Toyomi NishidaHiroshi SohmaHayami Ito
    • Toyomi NishidaHiroshi SohmaHayami Ito
    • C04B7/43F27B7/20C04B7/44
    • C04B7/434F27B7/2033
    • A process is disclosed for calcining cement-clinkers by using a calcination apparatus having a generally cylindrical calcining furnace which is composed of (a) a throat part, (b) a spouted bed and (c) an uppermost chamber longitudinally connected in series with an upper part of a combustion chamber having a separate heat source. The calcining apparatus is disposed between a suspension type raw material preheating device and rotary kiln or a fluidized bed calcining device wherein, cement raw materials, which have been partly calcined in the said raw material preheating device, are fed in the vicinity of the upper end of the said spouted bed while a jet fluid of a high temperature flue gas passing through the throat part under high speed from the said combustion chamber and rising upwards is admixed with a tangential flow of a high temperature exhaust gas introduced into the vicinity of the upper end of the said spouted bed from the said rotary kiln or from the fluidized bed calcining device. This forms a vigorously admixed and dispersed tangential flow zone where the calcination and heat exchange of the cement raw materials are carried out in the central part of the said calcining furnace and a returning swirl flow zone of a relatively low temperature falling downwards together with non-calcined cement raw materials in the vicinity of the surface of the inner wall of the said calcining furnace; and powders of completely calcined cement raw materials are selectively exhausted together with the exhaust flue gas from the vicinity of the top part of the said calcining furnace and are transported to the rotary kiln or the fluidized bed calcining device.
    • 公开了一种通过使用具有通常为圆柱形的煅烧炉的煅烧装置来煅烧水泥熟料的方法,所述煅烧装置由(a)喉部,(b)喷射床和(c)纵向与 燃烧室的上部具有单独的热源。 煅烧装置设置在悬浮型原料预热装置和回转窑之间或流化床煅烧装置中,其中在原料预热装置中部分煅烧的水泥原料在上端附近进料 所述喷射床的高温烟道气的喷射流体与来自所述燃烧室高速通过所述喉部的高温烟道气并且向上升起,与引入所述燃烧室附近的高温废气的切向流混合 从所述回转窑或来自流化床煅烧装置的所述喷射床的端部。 这形成了强力混合和分散的切向流动区,其中水泥原料的煅烧和热交换在所述煅烧炉的中心部分进行,并且具有相对较低温度的返回的涡流流动区域与非 - 煅烧水泥原料在所述煅烧炉内壁表面附近; 并且完全煅烧的水泥原料的粉末与来自所述煅烧炉的顶部附近的排气烟道一起选择性地排出,并被输送到回转窑或流化床煅烧装置。