초록 ▼

A system for the thermal processing of material in a housing having an inlet for receipt of the materials and an outlet for the discharge of the material after thermal treatment. The heating of the materials is accomplished, at least in part, by contact of the materials with a particulate medium whi

A system for the thermal processing of material in a housing having an inlet for receipt of the materials and an outlet for the discharge of the material after thermal treatment. The heating of the materials is accomplished, at least in part, by contact of the materials with a particulate medium which has been preheated in a separate heating operation employing infrared radiant heaters. The housing includes a heating zone separate from the zone used for thermal processing of the materials with the separate heating zone including the infrared radiant heaters. The particulate medium is introduced to the heating zone and brought to a controlled temperature. The medium is then conveyed to the processing zone where it is admixed with the materials being thermally processed. A shrouded zone is located intermediate the processing and particulate medium heating zones. This zone comprises a section of reduced clearance thereby providing a gas and dust lock between the processing and heating zones. The conveyor system may comprise a single shaft supporting agitating and conveying paddles in the processing and heating zones and a screw conveyor in the intermediate shrouded zone.

대표청구항 ▼

[ What is claimed:] [1.] An apparatus for thermally processing material comprising a housing having a processing zone, an inlet at one end of the processing zone for receipt of said material and an outlet at the opposite end of the processing zone for discharge of the material, a separate entry defi

[ What is claimed:] [1.] An apparatus for thermally processing material comprising a housing having a processing zone, an inlet at one end of the processing zone for receipt of said material and an outlet at the opposite end of the processing zone for discharge of the material, a separate entry defined by the processing zone, a particulate medium, infrared radiant heaters for heating said medium to a processing temperature, means for introducing the heated medium into said processing zone through said separate entry for admixture of the medium with said material, a rotary conveyor for moving the medium and material in the processing zone toward said outlet, said housing including a heating zone provided with said infrared heaters, and a shrouded zone located between said processing zone and said heating zone, said rotary conveyor extending into said shrouded zone and said heating zone, means for introducing said medium to said heating zone for heating said medium to said processing temperature, said rotary conveyor providing means for moving the heated medium into said processing zone, the dimensions of said housing in said shrouded zone substantially corresponding to the diameter of said rotary conveyor whereby a dust and gas lock is formed between the processing zone and the heating zone, and means for removing the medium and material from said outlet.