Mobile crushing plants are built ready-mounted on their own travel
gear. Semi-mobile plants, on the other hand, are moved from one
location to the next as a piggyback load on separate haul units.
Each crushing plant comes ready to operate with its own feed
hopper, feed conveyor, discharge conveyor and material transfer
belt. The size and design of the crusher naturally depends upon
the work that it is intended for. Even plants with the largest gyra-
tory or jaw crushers reach availabilities in excess of 90 % and
that in the hardest of rocks, while at the same time cutting back
the inner-pit transport costs by anything up to 50 % and more.

Semi-mobile crushing plants are always to be recommended when
a change of location is only in long periods. This is especially so
in large and deep open pits where overburden and minerals are
being extracted at several points simultaneously.

To keep piggyback loads as low as possible, the largest semi-
mobile plants are designed in individual modules for fast and
easy movement.