SECTION 2 - GENERAL INSTALLATION INFORMATION
2-10
MP SERIES CONE CRUSHER TECHNICAL REFERENCE MANUAL
2.4 Feed Arrangement
The feed material going to the Crusher must be
controlled to keep the Crusher from overflowing, to
keep the Crusher from drawing too much power
and to keep the crushing forces within the design
limits (crushing force overload is exhibited by
adjustment ring motion relative to the mainframe;
called ring bounce). This is usually done by
locating a surge bin with a variable speed feeder
directly ahead of the Crusher so that the rate of feed
can be adjusted based on the cavity level, power
draw and adjustment ring vibration levels.
The presentation of the feed material into the
crushing cavity is also important. The feed material
should not drop more than 4' into the Crusher from
the feeder or chute. The preferred arrangement is
shown on the drawing provided as part of the
installation drawing package called “suggested feed
arrangement”. Here we show the basic design of
the feed arrangement that should include a rock
box. The feed material should overshoot the center
of the Crusher and impact into a dead bed rock box
which has a feed chute that can be located so that
the feed material will impact onto the center of the
crusher feed plate. This design provides the limit to
feed velocity required. It also provides the
centering of feed into the Crusher and will reduce
the segregation of fine versus coarse material due to
the mixing in the dead bed rock box. Refer to
Figure 2-5.
If the feed particles are very large, it may not be
possible to use a feed chute due to bridging which
can occur with the restriction of the feed chute. In
these cases, a larger diameter hole with wear
protection, can be used to direct the cascade of
material out of the rock box and onto the feed plate
of the Crusher.
Figure 2-5 Feed Arrangement
Incorrect Method of Feed
Correct Method of Feed
Here the incoming material passes through one side
of the feed opening, causing uneven distribution.
Here the incoming material falls on the feed plate
properly.
Results of uneven distribution are:
• reduced capacity
• oversize product
• excessive adjustment ring movement
• maximum bearing pressure
• maximum power consumption
Results of even distribution are:
• maximum capacity
• uniform product
• minimum adjustment ring movement
• minimum bearing pressures
• minimum power consumption
Summary of Contents for MP1000
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