APPARATUS FOR PREPARING EXPANDED GRAPHITE Russian patent published in 1997 - IPC

FIELD: graphite production. SUBSTANCE: invention is dealing with destructive distillation of carbon-containing materials to produce expanded graphite from its oxidized forms, which may be applied in iron, nonferrous, nuclear, aircraft, automotive, shipbuilding, and chemical industries and for environment protection. Invention consists in that, into apparatus for producing graphite containing feed bin connected through adjusting gate to working chamber, which, in turn, is coupled with storage hopper, superhigh-frequency generator is incorporated and working chamber is made in the form of waveguide with short-circuited wall, its inlet being connected to high-frequency generator. Upper wall of waveguide has an aperture, being beyond-cutoff for working wavelength, with a flange on its end. A pipe is attached to the flange connected to adjusting gate of feed bin. Storage hopper communicates through waveguide filter with working chamber. An aperture near the working chamber inlet is available that is beyond-cutoff for working wavelength and has a nipple on its end to be connected through fitting with air-supply arrangement. Apparatus allows power consumption to be reduced by a factor of 40-200 and process temperature 17 times lowered, which weakens electric insulation exigency and simplifies apparatus structure, enables using less heat-resistant and less expensive materials. EFFECT: increased capacity and reduced cost. 1 dwg, 1 tbl