JPS6479509A - Waste material disposal - Google Patents

Abstract

PURPOSE:To provide a stable melting operation without requiring any heating source by a method wherein a required amount of unburnt substance left in combustion ashes by forwarding or retracting it in a transmitting direction in such a way as a complete combustion position of waste material during its transportation enters a proper range and then the remaining unburnt substance is burnt in the combustion ashes. CONSTITUTION:A ratio of inclusion (r) of unburnt carbon in combustion ashes A is calculated in order to get a proper melting operation within an ash melting furnace 2. An inclusion ratio (r) of the unburnt carbon at that time is inspected while supervising a melting condition in the ash melting furnace 2 so as to calculate the desired ratio of inclusion (r). The inclusion ratio (r) of the unburnt carbon and a position of a complete igniting position 12 within a main body 3 of the furnace have a cooperative relation. As a complete igniting point 12 is retracted, i.e. moved toward an upstream side 9 of the transporting operation, the combustion ashes A are exposed more to a flame while its transporting operation, so that an amount of unburnt carbon in the combustion ashes A is reduced and in turn as it may advance to move toward the downstream side 10, its amount is increased. Accordingly, the inclusion ratio (r) of the unburnt carbon in the combustion ashes A can be increased or decreased by moving the burn completing point 12 toward the transporting direction E in an aft and fro direction.