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    • 1. 发明申请
    • PROCESS AND PLANT FOR PRODUCING METAL OXIDE FROM METAL HYDROXIDE
    • 用于从氢氧化金属生产金属氧化物的方法和设备
    • WO2005005318A2
    • 2005-01-20
    • PCT/EP2004/006870
    • 2004-06-25
    • OUTOKUMPU OYJMISSALLA, MichaelHIRSCH, MartinSTRÖDER, MichaelHOFFHAUS, Karsten
    • MISSALLA, MichaelHIRSCH, MartinSTRÖDER, MichaelHOFFHAUS, Karsten
    • C01F7/44
    • C01B13/18C01F7/445
    • This invention relates to a process for producing metal oxide from metal hydroxide, in which the preheated metal hydroxide is at least partly supplied via at least one pneumatic delivery conduit and via at least one downstream separating cyclone (8, 11) to a fluidized-bed reactor (12), where it is heated to a temperature of 650 to 1250°C by combustion of fuel, and metal oxide is produced. In a mixing vessel (19), the metal oxide is mixed with a partial stream of preheated metal hydroxide such that the preheated metal hydroxide is further heated and at least partly calcined. Then, the metal oxide is supplied from the mixing vessel (19) to at least one cooling stage (27, 28, 30, 31). The energy utilization of the process is increased in that the waste gas of the at least one separating cyclone (8, 11) is introduced into the mixing vessel (19) as conveying air such that the metal oxide from the mixing vessel (19) is pneumatically delivered into the at least one cooling stage or a de livery conduit (24) leading to the same. Furthermore, the invention relates to a corresponding plant.
    • 本发明涉及由金属氢氧化物生产金属氧化物的方法,其中预热的金属氢氧化物至少部分通过至少一个气动输送导管并经由至少一个下游分离旋流器(8 ,11)加入到流化床反应器(12)中,在该反应器中通过燃料燃烧将其加热到650-1250℃的温度,并且产生金属氧化物。 在混合容器(19)中,金属氧化物与部分预热的金属氢氧化物流混合,使得预热的金属氢氧化物进一步加热并至少部分煅烧。 然后,将金属氧化物从混合容器(19)供应到至少一个冷却阶段(27,28,30,31)。 该方法的能量利用率增加,因为至少一个分离旋风分离器(8,11)的废气作为输送空气被引入到混合容器(19)中,使得来自混合容器(19)的金属氧化物是 气动输送到所述至少一个冷却台或通向其的冷却导管(24)。 此外,本发明涉及相应的设备。