The potential cost savings from using a mobile crushing and conveying system based at the rock face are significant: a study conducted by Tampere
University in Finland found a 31-percent cost savings over semi-mobile installations in similar applications. The savings over using haulers is
greater, as the excavators or wheel loaders used for feeding the haulers can be downsized (to ones more suited to the crusher rather than the
hauler); labor costs are reduced too as there are no longer hauler operators to employ. In terms of manpower, the excavator or wheel loader
operator can control the complete crushing operation. Fuel usage is also drastically reduced and there is also no longer a need to build
elaborate and well-maintained haul roads — a significant additional and ongoing expense.

With a similar lifespan to that of stationary systems mobile plants have few disadvantages. There are even significant environmental advantages
of using a mobile system: eliminating haulers reduces noise, vibrations and emissions — and fuel. Safety too is enhanced, as fast moving
vehicles play a significant role in site accident statistics.

Jaw Crusher Hammer Crusher Cone Crusher stone crusher Vibrating Screen crushers

Mobile systems will not totally replace the stationary variety. In quarries where supply is large (more than 500,000 tons per annum) and constant
in a small radius the stationary plant is justified. But where supply is not large then mobile plants have the advantage of being able to
circulate between locations and build up stockpiles. In mining, the advantages of having a primary crusher feeding a conveyor system are
becoming more recognized as an effective solution. Once this is fully established the industry will move to a mobile second stage and finally
third stage of crushing. The United Kingdom is already at this third stage, whereas the United States has been catching up fast from a late
start.

With their lower capital and operating costs, flexibility of siting and elimination of the need for haulers and haul roads, mobile crushing
plants offer an attractive alternative to the traditional stationary crusher and hauler system. The reduction in manpower, fuel usage and
pollution is mirrored by an increase in health and safety.

Offering higher productivity and low cost per ton production, truly mobile tracked crushing plants are destined to become a more common sight
in quarries and mines worldwide.

Courtesy of: Metso Minerals

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