2012年(464)
分类: Delphi
2012-07-23 16:05:10
The above picture shows the possible modes of operation of the improved . For each mode
of operation, the ball movements during the milling process are confined to the
vertical plane by the mill chamber walls and by the applied external magnetic
field. Solid Pan configurations provide a rugged pan to withstand the impact of
heavy loads and still provide consistent feed control. A common use may be high
production sand & gravel operation with haul trucks dumping into a hopper
and the feeder discharging onto a scalping vibrating
screen.The strength and direction of the magnetic field are adjusted
externally by repositioning the magnets. The trajectories of the balls are
controllable and reproducible for each mode of operation in this design. The
general patterns of the ball movement are a function of the magnet positions and
the rotational speed of the mill. In Case A the mill operates in the
conventional mode of operation; no magnetic
field is introduced to the mill. After a number of revolutions, the trajectories
of the individual balls are quite chaotic. In Case B the introduction of a
magnetic field to the ball mill now controls the trajectories of the
balls.
All Hongxing feeders incorporate a heavy duty vibrator assembly with
cast shafts, open housing – flow through oil lubrication, double row spherical
roller bearings and precision cut gears. Adjustable gear timing and bolton
counterweights allow for maximum stroke adjustment (both angle and length) to
achieve optimum feed control and consistent production. Solid pan, straight deck
and step deck configurations offer additional versatility in feeder design to
consistently deliver on the promise of outstanding performance.
By moving the
magnet away from or nearer to the mill, different attractive forces can be
generated. This dramatically affects the ball movement pattern. In Case B the
two magnets positioned at the bottom of the mill result in a characteristic
change in ball movement and split the balls into two groups with the ball
rotation in each group being in opposite directions. Case C can be obtained by
reducing the mill rotational speed or by reducing the strength of the magnetic
field; the balls both rotate and oscillate around the
equilibrium position at
the bottom.
Incorporating one set of grizzly bars at the discharge end of the
feeder allows smaller material to be “screened out” of the feed material. This
arrangement is common on standard duty models in portable plant applications,
feeding the oversized material directly into a crusher. Grizzly sections are
typically 4′ to 5′ long.