Method of and apparatus for treating granular material

Details Method of and apparatus for treating granular material Method of and apparatus for treating granular material

1984-01-09

1986-01-07

Camby, John J.

Heating

Processes of heating or heater operation

Including passing, treating or conveying gas into or through...

432 58, F27B 1500

Patent

active

045631514

ABSTRACT:
A method and apparatus for treating granular materials which require to be heated to drive off volatile constituents and which require to be cooled, for example foundry sand containing an organic binder. The method comprises the step of maintaining a mass of the material at a treatment temperature lying in the range 250.degree.-400.degree. C. for between four and thirty hours. The mass may be initially heated by virtue of a manufacturing process in which the mass has been previously used. Alternatively, the mass may be initially heated by a pre-heating step such as heating in a fluidized bed. Alternatively, the mass may be heated by being placed in heat transfer relationship with a second mass of the material which has been previously heated, for example, in a fluidized bed. Apparatus for performing the method is also disclosed.

REFERENCES:
patent: 2821375 (1958-01-01), Andrews
patent: 4149581 (1979-04-01), Adkinson et al.
patent: 4151399 (1979-04-01), Beale
patent: 4299562 (1981-11-01), Harman

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