NOVELTY - An adduction type gear pump (4) arranged in a recirculation pipe (10) transfers melt waste plastic from an ejection valve of a container (8) storing melt waste plastic to the upper portion of container. A strainer having openings of size 0.1-10 mm removes foreign material from the melt plastic, except the foreign material from melt plastic transferred between the gear pump and the container upper portion.    USE - For performing thermal treatment of waste plastics obtained from houses, industrial waste plastics, waste plastics in municipal solid waste, waste plastic obtained from used container packaging material, electrical products and motor vehicles, to recycle waste plastics as solid reducing agent for iron ore and solid fuel used in blast furnace for pig iron manufacture, boiler, heating furnaces, kiln, cupola, coke oven, in chemical industry.    ADVANTAGE - The foreign materials are efficiently removed from the melted plastic. The pumping efficiency of melted plastic is improved. Enables easily grinding the melted plastic after cooling and solidifying the melted plastic. The corrosion of the inner-wall refractories of the furnace due to chlorine compounds does not arise, when the solid fuel or reducing agent is used in the furnace.    DETAILED DESCRIPTION - A strainer (20) is arranged between the ejection valve and the gear pump. A heat exchanger (13) which raises the temperature of melted plastic using a heat carrier (5) is arranged in the recirculation pipe. A heating unit for heating the melted plastic is provided in the casing of the pump or the recirculation pipe. A stirring unit (21) stirs the melted plastic in the container. The waste plastic received by the container is in a solid or molten state. The side wall (6) of the container has a jacket through which the heat carrier passes. A waste-gas cleaning unit (11) is arranged at the upper side of the container.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of the thermal treatment equipment for waste plastics.    adduction type gear pump (4)    heat carrier (5)    side wall (6)    container (8)    pipe (10)    waste-gas cleaning unit (11)    heat exchanger (13)    strainer (20)    stirring unit (21)