Method and apparatus for subjecting mineral particles to gas flo

Details Method and apparatus for subjecting mineral particles to gas flo Method and apparatus for subjecting mineral particles to gas flo

1980-12-23

1982-07-06

Camby, John J.

Heating

Processes of heating or heater operation

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

34 33, 34236, 34246, 432 58, 432144, F27B 1500, F26B 300

Patent

active

043380794

ABSTRACT:
Roller grate method and apparatus for simultaneously transporting, agitating and exchanging heat with a bed of solid mineral particles has elongated cylindrical horizontal rollers with gas passage apertures therethrough, a hopper for feeding mineral particles onto the rollers and forming a bed having a depth several times greater than the average diameter of the particles; a drive source to rotate the rollers and frictionally engage the cylindrical surfaces with the particles in the lowermost layer of the bed and urge the bed along a path of travel transverse to the axes of the rollers; elongated filler members disposed in the nip between adjacent rollers to prevent the particles from jamming the rollers and to provide resistance to the flow of the bed along said path of travel; and a heat chamber spanning the rollers and a fan for forcing a heat transfer gas stream through the gas passage apertures in the rollers and through the bed as it is being transported, the rollers and the filler members being adapted to continually agitate the particles and to slowly transport the bed past the gas stream at a velocity which is only a minor fraction of the peripheral velocity of the rollers.

REFERENCES:
patent: 626202 (1899-05-01), Dula
patent: 1667428 (1928-04-01), Mason
patent: 1960616 (1934-05-01), Bartram
patent: 3329263 (1967-07-01), Rush et al.
patent: 3518944 (1970-07-01), Patin
patent: 3589033 (1971-06-01), Bryand
patent: 4258005 (1981-03-01), Ito et al.

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