The invention relates to a method for washing/cleaning granular material from slag and for washing/cleaning bottom/boiler ash from a thermal waste treatment. In the method, the granular material is added to a process liquid and is subjected to ultrasound therein. According to the invention, it is proposed that the process liquid is located in an upright cleaning channel with an upper feeding end and a lower extraction end, that the granular material is introduced into the cleaning channel from the feeding end, and moves downwards towards the extraction end due to the force of gravity, and is subjected to ultrasound during the sinking movement.

The invention relates to a method for washing/cleaning granular material from slag and for washing/cleaning bottom/boiler ash from a thermal waste treatment. In the method, the granular material is added to a process liquid and is subjected to ultrasound therein. According to the invention, it is proposed that the process liquid is located in an upright cleaning channel with an upper feeding end and a lower extraction end, that the granular material is introduced into the cleaning channel from the feeding end, and moves downwards towards the extraction end due to the force of gravity, and is subjected to ultrasound during the sinking movement.

The invention relates to a method for washing/cleaning granular material from slag and for washing/cleaning bottom/boiler ash from a thermal waste treatment. In the method, the granular material is added to a process liquid and is subjected to ultrasound therein. According to the invention, it is proposed that the process liquid is located in an upright cleaning channel with an upper feeding end and a lower extraction end, that the granular material is introduced into the cleaning channel from the feeding end, and moves downwards towards the extraction end due to the force of gravity, and is subjected to ultrasound during the sinking movement.

The invention relates to a method for washing/cleaning granular material from slag and for washing/cleaning bottom/boiler ash from a thermal waste treatment. In the method, the granular material is added to a process liquid and is subjected to ultrasound therein. According to the invention, it is proposed that the process liquid is located in an upright cleaning channel with an upper feeding end and a lower extraction end, that the granular material is introduced into the cleaning channel from the feeding end, and moves downwards towards the extraction end due to the force of gravity, and is subjected to ultrasound during the sinking movement.