| 摘要 |
PCT No. PCT/SE95/01043 Sec. 371 Date Apr. 11, 1997 Sec. 102(e) Date Apr. 11, 1997 PCT Filed Sep. 15, 1995 PCT Pub. No. WO96/12847 PCT Pub. Date May 2, 1996The invention relates to a process for purifying electric precipitator ash of chlorides and potassium by means of leaching, filtering and washing a filter cake, with the leaching being carried out using water and recirculated filtrate from a previous washing. The process is characterized in that the filtration and the washing of the filter cake, and, where appropriate, the leaching, take place in a pressure filter in one and the same vessel. |
