Method and apparatus for removing volatile hydrocarbons from par

Details Method and apparatus for removing volatile hydrocarbons from par Method and apparatus for removing volatile hydrocarbons from par

1991-11-21

1993-08-31

Yuen, Henry C.

Heating

Tumbler-type rotary - drum furnace

432106, 110246, F27B 700

Patent

active

052404129

ABSTRACT:
A continuous method of removing volatilizable organic composition from particulate mineral composition comprises heating the organic composition contaminated mineral particles in a rotating drum and exposing the particles to said hot gases to volatilize the organic composition from the mineral particles while advancing the particles counter-current to the direction of hot gas flow, removing a gaseous composition from the drum comprising a mixture of the gases of combustion, volatilized organic composition and airborne fine mineral particles, separating the fine mineral particles from the hot gases and volatile volatilized organic composition returning the separated fine mineral particles into the drum near the hot end, mixing the fine particles with the coarse mineral particles advancing toward the hot drum end, continuing to heat the mixture of fine and coarse mineral particles until the concentration of volatilizable organic composition is less than about 100 parts per million, and recovering a mixture of coarse and fine mineral particles adjacent said first drum end. The invention includes a preferred apparatus for carrying out the process.

REFERENCES:
patent: 4211490 (1980-07-01), Brock et al.
patent: 4427377 (1984-01-01), Dambrine et al.
patent: 4555182 (1985-11-01), Mendenhall
patent: 4575336 (1986-03-01), Mudd et al.
patent: 4748921 (1988-06-01), Mendenhall
patent: 5085581 (1992-02-01), Mendenhall

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