公开(公告)号：US07247282B2

公开(公告)日：2007-07-24

申请号：US10481844

申请日：2002-06-14

申请人： Bror Nyman ,  Stig-Erik Hultholm ,  Juhani Salmi ,  Jarmo Sivonen

发明人： Bror Nyman ,  Stig-Erik Hultholm ,  Juhani Salmi ,  Jarmo Sivonen

IPC分类号： C01G37/02 ,  C01G49/02 ,  C01G53/04

CPC分类号： C02F1/66 ,  C02F1/5245 ,  C02F1/56 ,  C02F1/64 ,  C02F2101/14 ,  C02F2101/20 ,  C02F2101/203 ,  C02F2101/22 ,  C02F2103/16 ,  C02F2209/06 ,  C22B3/44 ,  Y02P10/234

摘要： The invention relates to a method for the removal of metals from their aqueous solution with lime precipitation, in conditions where a precipitate of metal hydroxide and gypsum is formed, which settles well and is easy to filter. The metals are precipitated from their aqueous solutions at a high pH value and the slurry is recirculated several times in the precipitation space, whereby the gypsum is precipitated as separate crystals instead of a solid layer. The method is particularly suitable for neutralization of the aqueous solution from the pickling of refined steel. Using this method enables the removal of metals and fluoride from the water in question.

摘要翻译： 本发明涉及在形成金属氢氧化物和石膏的沉淀物并且易于过滤的条件下用石灰沉淀从其水溶液中除去金属的方法。 金属在高pH值下从其水溶液中沉淀出来，浆液在沉淀空间中再次循环数次，由此将石膏作为分离的晶体而不是固体层沉淀。 该方法特别适用于中和来自精炼钢酸洗的水溶液。 使用这种方法可以从相关水中去除金属和氟化物。