1. APPARATUS FOR THE CONTROLLED COOLING OF A STREAM OF MOLTEN ASH WHICH COMPRISES MEANS DEFINING AN OPENING FOR THE MOVEMENT OF A STREAM OF MOLTEN ASH DOWNWARDLY THERETHROUGH, A COOLING FLUID CONTAINING TANK POSITIONED BENEATH SAID OPENING TO RECEIVE SAID STREAM OF MOLTEN ASH, CONVEWYOR MEANS POSITIONED IN THE UPPER PORTION OF SAID TANK OPERABLE TO MOVE SUBSTANTIALLY HORZONTALLY ACROSS SAID TANK FROM A MOLTEN ASH RECEIVING POSITION BENAEATH SAID OPENING TO A SOLIDIFIED ASH DISCHARGE POSITION OUTSIDE OF SAID TANK, AND MEANS FOR MAINTAINING A LEVEL OF COOLING FLUID WITHIN SAID TANK TO ESTABLISH A FILM OF COOLING FLUID ON THE UPPER SURFACE OF SAID CONVEYOR WITHIN SAID TANK TO COOL THE CONVEYOR AND TO SLOWLY SOLIDIFY THE MOLTEN ASH DEPOSITED ON SAID CONVEYOR.