Patent ID: 9278358
Filing Date: 2016-03-08
CPC Classification: B03B,B03D,C04B,C10L,Y02W

Claim Text:
1. Method for processing charcoal ash that is generated in power plants by separating in a foaming and filtering process a carbonaceous product from the mentioned charcoal ash to be used again and by gathering essentially carbon free, silicated ash products gained during the processing into product silos, characterized in that in the method charcoal ash ( 1 ) is directed to the foaming process ( 11 , 6 a ) in which ash contents containing silicate product and coal product are separated from each other using water as an intermediate agent in which case the separating is based on the surface-active properties of the coal having effect on foaming, a coal product concentrate created during said foaming process and a coarse ash fraction that became nearly carbon-free, are filtered in the filters ( 7 a ), ( 7 b ) and at least said coarse ash fraction, which contains silicate and is nearly carbon free is dried in order to evaporate water that is left over by using heated, pressurized work gas, is directed through a pneumatic classifier and is then directed to the product silos ( 12 ) and ( 13 ) and the concentrated coal is returned as a fuel to energy production.