公开(公告)号：US20160060113A1

公开(公告)日：2016-03-03

申请号：US14888232

申请日：2014-11-02

申请人： EASYMINGING SWEDEN AB

发明人： Yariv COHEN ,  Patrik ENFÄLT

IPC分类号： C01B25/32 ,  C01B25/36

CPC分类号： C01B25/32 ,  C01B25/28 ,  C01B25/36 ,  C01B25/375 ,  C01F7/34 ,  C01F7/56 ,  C01F7/74 ,  C01F11/46 ,  C01G1/12 ,  C01G45/02 ,  C01G49/0009 ,  C01G49/02 ,  C01G49/10 ,  C01G49/14 ,  C02F1/66 ,  C02F11/00 ,  C02F2101/105 ,  C05B11/12 ,  C05B11/16 ,  C05F7/00 ,  Y02A40/213

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 aluminium 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： 磷酸盐化合物的浓缩方法包括将淤泥灰（205）溶解在盐酸中。 不溶性残渣分离（210），从而形成第一浸出溶液。 控制第一浸出溶液中磷与铁和铝之和的摩尔比（215）大于1.将碱加入到第一浸出溶液中，其量使磷酸盐化合物沉淀。 从第一浸出溶液中除去沉淀的磷酸盐化合物（225）。 向第一浸出溶液中加入硫酸（240），导致硫酸盐化合物的沉淀。 沉淀的硫酸盐化合物与第一浸出溶液分离（245）。 浸出溶液的至少一部分被循环（248）作为用于溶解污泥灰的盐酸。 提出了处理沉淀的磷酸盐化合物的其它方法以及用于进行该方法的布置。