公开(公告)号：US06821384B1

公开(公告)日：2004-11-23

申请号：US09958326

申请日：2001-10-09

申请人： Reijo Seppänen

发明人： Reijo Seppänen

IPC分类号： D21C1100

CPC分类号： D21C11/066 ,  Y10S210/928

摘要： The invention relates to a process for the treatment of fly ash accumulating in the electro-filter of the soda recovery unit in a sulfate cellulose mill, the ash containing primarily Na sulfate, Na chloride, Na carbonate and K sulfate, to produce industrial raw materials, in which process the fly ash is dissolved in water, the carbonate present therein is broken down with hydrochloric acid to Na chloride, a sulfate precipitation chemical in chloride form is added, the sulfate precipitate obtained is separated from the solution, and the chloride-containing solution is recovered.

摘要翻译： 本发明涉及一种在硫酸纤维素磨机中处理积聚在苏打回收装置的电动过滤器中的粉煤灰的方法，该灰分主要包含硫酸钠，氯化钠，碳酸钠和硫酸钾，以生产工业原料 在该方法中，将粉煤灰溶解在水中，将其中存在的碳酸盐用盐酸分解成氯化钠，加入氯化物形式的硫酸盐沉淀化学品，将所得硫酸盐沉淀物与溶液分离， 回收含有溶液。