Method of purifying electric precipitator ash using a pressure filter
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United States of America Patent
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Jun 15, 1999
Grant Date -
N/A
app pub date -
Apr 11, 1997
filing date -
Oct 20, 1994
priority date (Note) -
Expired
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Abstract
The 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.
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