Solid material comminution or disintegration – Processes – By utilizing kinetic energy of projected or suspended material
Patent
1990-11-27
1992-07-28
Rosenbaum, Mark
Solid material comminution or disintegration
Processes
By utilizing kinetic energy of projected or suspended material
241 40, B02C 1906
Patent
active
051335042
ABSTRACT:
A fluidized bed jet mill has a grinding chamber with a peripheral wall, a base, and a central axis. An impact target is mounted within the grinding chamber and centered on the chamber's central axis. Multiple sources of high velocity gas are mounted in the peripheral wall of the grinding chamber, are arrayed symmetrically about the central axis, and are oriented to direct high velocity gas along an axis intersecting the center of the impact target. In another embodiment, a fluidized bed jet mill has a grinding chamber with a peripheral wall, a base, and a central axis. Multiple sources of high velocity gas are mounted in the peripheral wall of the grinding chamber, are arrayed symmetrically about the central axis, and are oriented to direct high velocity gas along an axis intersecting the central axis of the grinding chamber. Each of the gas sources has a nozzle holder, a nozzle mounted in one end of the holder oriented toward the grinding region, and an annular accelerator tube mounted concentrically about said nozzle holder. The end of the accelerator tube closer to the nozzle is larger in diameter than the nozzle holder and the opposite end of the accelerator tube. The accelerator tube and the nozzle holder define between them an annular opening through which particulate material in the grinding chamber can enter and be entrained with the flow of gas from the nozzle and accelerated within the accelerator tube to be discharged toward the central axis. These embodiments can be combined for further efficiency enhancement.
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Mastalski Henry T.
Smith Lewis S.
Hughes S. Thomas
Rosenbaum Mark
Xerox Corporation
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