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    • 2. 发明申请
    • PROCESS FOR PRODUCING LOW-SODA ALUMINA, APPARATUS THEREFOR, AND ALUMINA
    • 用于生产低SODA氧化铝的方法,其装置和铝
    • WO2005123590A1
    • 2005-12-29
    • PCT/JP2005/011486
    • 2005-06-16
    • SHOWA DENKO K.K.KIMURA, KiichiKOMIYA, Takayoshi
    • KIMURA, KiichiKOMIYA, Takayoshi
    • C01F7/44
    • C01F7/442C01F7/022C01F7/46C01P2004/61C01P2004/62C01P2006/80
    • A process for producing a low-soda alumina comprising calcining aluminum hydroxide in a calciner in the presence of a soda-removal agent, wherein the alumina dust produced in the calciner is sorted by particle size and collected in a dust collector and at least a portion of the collected alumina dust is subjected to a soda-removal process and is then returned to the calciner. An apparatus for producing a low-soda alumina, comprising a calciner for calcining aluminum hydroxide in the presence of a soda-removal agent, by which alumina dust is produced; a unit connected to the calciner for collecting, by particle size, the alumina dust; a unit for removing soda from a slurry containing at least a portion of the collected alumina dust; and a circuit for returning the soda-removed alumina dust back into the calciner.
    • 一种生产低苏打氧化铝的方法,包括在煅烧炉中在苏打去除剂的存在下在煅烧炉中煅烧氢氧化铝,其中煅烧炉中产生的氧化铝粉末按粒度分级并收集在集尘器中,并且至少部分 的收集的氧化铝粉末进行苏打去除处理,然后返回到煅烧炉中。 一种低苏打氧化铝的制造装置,其特征在于,在苏打去除剂的存在下,含有煅烧氢氧化铝的煅烧炉,生成氧化铝粉末; 连接到煅烧器的单元,用于通过粒度收集氧化铝粉尘; 用于从含有至少一部分收集的氧化铝粉尘的浆料中除去苏打的单元; 以及将除去苏打的氧化铝灰尘返回到煅烧炉中的回路。