Ash melting furnace arrangement and method for supplying ash to ash melting furnace

An ash melting furnace arrangement including an ash pretreating unit for pretreating ash which contains a large quantity of water and for supplying the ash to an ash melting furnace, said pretreating unit comprising a dry sorting machine for removing solids of a size larger than a predetermined value from the ash and for drying the ash, a magnetic sorting machine for removing metals from the ash dried by the dry sorting machine, and a drying air pipe for introducing high-temperature air heat-recovered from exhaust gases discharged from the ash melting furnace to the dry sorting machine as drying air, wherein said dry sorting machine comprises:

• a casing having a first end and a second end,
• a screen having a vibratory frame arranged within the casing to slant from the first end of the casing downwardly toward the second end thereof, a plurality of spaced apart comblike blade plates attached to the vibratory frame in a descending series of cascades, and a vibrator connected to the vibratory frame;
• an ash supply port disposed above the first end of the casing for supplying ash therethrough;
• a solids discharge port disposed below the second end of the casing;
• an ash exhaust port disposed below the screen;
• and
• a drying air supply port connected to the drying air pipe and disposed below the screen.