Abstract: Waste which contains a substantial amount of material which melts and drips as it burns, is used as the source material. The process is adapted to not only dispose of the waste, but also to provide heat for generating steam and other useful purposes. The invention is used very advantageously for the burning of vulcanized rubber wastes with control of the gases so that they do not cause an environmental hazard.The waste may be reduced to particle size, but this is not necessary. Whole old tires may be used.The meltable waste is burned over means which collects the drip and does not let it collect in and plug openings in conveyor means used in the combustion process. A very satisfactory means for collecting the drip is a bed of non-combustible balls or other particulate material carried by a conveyor, which bed prevents any substantial amount of the drip from being collected by the conveyor. Such non-combustible particulate material may be formed of steel, aluminum, ceramic material, etc.