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    Process for recovering metal oxide particles from a spent acid solution containing metal salts
    24.
    发明公开
    Process for recovering metal oxide particles from a spent acid solution containing metal salts 审中-公开
    过程为金属氧化物的从用金属盐废酸溶液中回收

    公开(公告)号：EP2784186A1

    公开(公告)日：2014-10-01

    申请号：EP13161325.9

    申请日：2013-03-27

    申请人： CMI UVK GmbH

    发明人： Sehner, Egon ,  Faber, Sergej ,  Marx, Thomas

    IPC分类号： C23G1/36 ,  C01B21/38 ,  C01B7/19 ,  C01B13/18

    CPC分类号： C01B13/18 ,  C01B7/191 ,  C23G1/36

    摘要： The present invention relates to a process for recovering metal oxide particles from a spent acid solution containing metal salts, the process comprising the steps of:
    -- spraying the spent acid solution containing the metal salts into an inlet end of a first chamber of a spray roasting reactor to form droplets of the spent acid solution, wherein the first chamber has the inlet end at an upper portion, wherein a first heating zone is defined by the first chamber;
    -- supplying a first heat source into the first chamber to the first heating zone, and heating the droplets in the first heating zone to a first temperature to evaporate liquid from the droplets to form dry particles of metal salts and to convert the particles of metal salts to particles of metal oxides;
    -- directing the particles of metal oxides to a second chamber, wherein a second heating zone is defined by the second chamber;
    -- supplying a second heat source into the second chamber to the second heating zone, wherein the second heating zone is positioned below and downstream of the first heating zone;
    -- heating the particles of metal oxides, in the second heating zone, at a second temperature lower than the first temperature for a dedicated final conversion reaction;

    摘要翻译： 本发明涉及一种方法，用于从废酸中回收的金属氧化物颗粒的含金属的盐，该方法包括以下步骤： - 喷雾含金属盐成喷雾的第一腔室的入口端的废酸溶液 烘焙反应器，以形成废酸溶液，worin第一腔室具有在在上部入口端，一个worin第一加热区是由第一腔室限定的液滴; - 提供第一热源到所述第一室到所述第一加热区，并加热在第一加热区中的微滴至第一温度以蒸发从液滴液体以形成金属盐干颗粒和金属颗粒转化 盐的金属氧化物的颗粒; - 引导的金属氧化物的颗粒的第二腔室，worin由第二腔室限定的第二加热区; - 提供第二热源进入第二腔室至所述第二加热区，worin第二加热区位于下方且在第一加热区的下游; - 加热的金属氧化物的颗粒，在第二加热区中，在第二温度下比用于专用最终转化反应的第一温度低;