Process for removing volatiles from metal

Details Process for removing volatiles from metal Process for removing volatiles from metal

1987-10-16

1988-11-15

Yuen, Henry C.

Heating

Processes of heating or heater operation

Including preparing or arranging work for heating

432 11, 432 13, 432 72, 266 44, 110222, 110236, 110282, 110228, F27B 1400, F27D 500

Patent

active

047846038

ABSTRACT:
A process and apparatus is disclosed for removing volatile contaminants from scrap metal. The process is carried out in a furnace maintained at a relatively constant temperature having a first zone in which volatiles contained on the surface of the metal are vaporized and a second zone in which carbon contained on the surface of the metal is pyrolyzed. The furnace also has a vibrating conveyor for transporting metal therethrough at a specific speed. The process includes the step of vaporizing and fluidizing the volatiles to produce fumes containing unburned hydrocarbons without oxidizing the metal. The hydrocarbon fumes are then burned to produce hot gas which is recirculated to the furnace so as to contact new incoming scrap metal.

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