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    PRODUCTION OF PHOSPHATE COMPOUNDS FROM MATERIALS CONTAINING PHOSPHORUS AND AT LEAST ONE OF IRON AND ALUMINIUM
    4.
    发明公开
    PRODUCTION OF PHOSPHATE COMPOUNDS FROM MATERIALS CONTAINING PHOSPHORUS AND AT LEAST ONE OF IRON AND ALUMINIUM 审中-公开
    磷酸盐化合物的产量从含磷材料和铁中的至少一个铝

    公开(公告)号：EP2991935A1

    公开(公告)日：2016-03-09

    申请号：EP14791380.0

    申请日：2014-05-02

    申请人： Easymining Sweden AB

    发明人： COHEN, Yariv ,  ENFÄLT, Patrik

    IPC分类号： C02F11/00 ,  C01B25/22 ,  C01B25/238 ,  C01B25/46 ,  C05B11/12 ,  C05B11/16 ,  C05F7/00

    摘要： A method for concentration of phosphate compounds comprises dissolving (205) of sludge ash in hydrochloric acid. Insoluble residues are separated (210), thereby forming a first leach solution. A mole ratio of phosphorus to a sum of ferric iron and aluminum in the first leach solution is controlled (215) to be larger than 1. A base is added (220) to the first leach solution in an amount causing precipitation of phosphate compounds. The precipitated phosphate compounds are removed (225) from the first leach solution. Sulphuric acid is added (240) to the first leach solution, causing precipitation of sulphate compounds. The precipitated sulphate compounds are separated (245) from the first leach solution. At least a part of the leach solution is recycled (248) as the hydrochloric acid used for the dissolving of sludge ash. Further methods for processing the precipitated phosphate compounds are presented as well as arrangements for performing the methods.

    摘要翻译： 一种用于磷酸盐化合物的浓度的方法包括泥灰的溶解（205）中的盐酸。 不溶残渣分离（210），由此形成第一浸出溶液。 与三价铁和铝的总和在第一浸出溶液磷的摩尔比被控制（215）为大于1，一种碱加入（220）到在量曹景伟磷酸盐化合物的沉淀第一浸出溶液大。 除去沉淀的磷酸盐化合物（225）从第一浸提溶液。 加入硫酸（240）到所述第一沥滤溶液，引起硫酸盐化合物的沉淀。 将沉淀的硫酸化合物中分离（245）从第一浸提溶液。 至少所述浸提溶液的一部分被再循环（248）作为用于泥灰的溶解的盐酸。 用于处理所述沉淀的磷酸盐化合物的另外的方法被呈现以及用于执行所述方法的布置。