16
MARCH-APRIL 2014
d
&
ri
CRUSHING
& SCREENING
incarnation of what it claimed was the world’s
first mass-produced track-mounted screener,
the Robotrac.
Sandvik said the S type gyratory cone
crusher has proved itself in stationary
applications for over 30 years. It has now been
incorporated into a self-contained, diesel
driven track-mounted plant. Sandvik said it
was using standard technology that it had been
employing for many years, but is now putting
two parts of the technology together. The
standard frame from existing units is being
used with the S cone gyratory cone that it has
been selling “for decades”.
The S type gyratory cone is said to be able
to accept a feed size up to 90% larger than
current standard cones. Sandvik said this
allowed maximum productivity from the
primary crusher, or even enabled the S cone
to be operated as a primary crusher on gravel
applications.
The larger QS441 56 tonne class unit
will feature the CS440 cone, while the
smaller, more compact 36 tonne class QS331
incorporates the CS430 cone crusher.
The QI341 impact crusher is built around
the Prisec technology introduced by Sandvik
some years ago.
Sandvik said it was now a crusher and
screener in one, with a big screen box.
According to the company, the bottleneck in
units was usually the screen that was fitted,
and the new unit now features a 4.2 x 1.5 m
(13.8 x 4.9 ft) screen.
CLEAN FINES
CDE Global used ConExpo for the formal
launch of its new M4500 portable wash plant
for construction, mining, recycling and
industrial sands applications. According to the
company, with a capacity of 450 tonnes/hour,
the M4500 is a revolution in modular washing
equipment, offering feeding, screening, sand
washing and stockpiling on a compact chassis,
and enabling the production of four products
to a required specification.
Kleemann’s Mobirex EVO 2 mobile impact
crushers made their debut at Conexpo.
Kleemann said that for four years it had
consistently developed the Mobirex EVO
series and said it had been possible to improve
the material flow by using a new continuous
feed system (CFS), which was being used in a
similar way in the MC 110 EVO. Overloading
is detected using various parameters and
the material conveying speed is regulated
accordingly. Kleemann said that as a general
rule, therefore, the conveyor elements do not
come to a complete standstill and continuous
loading of the crushing unit is ensured.
The optional oversize grain return conveyor
has also been redesigned. Thanks to a bend-
free conveyor and a transfer chute integrated
at the feed hopper, operational safety when
working with non-uniform materials is said to
have been increased enormously and the range
of applications is therefore expended even
further.
The new conveyor in the oversize grain
return conveyor means the ground clearance
in the area of the optional screening unit
has been significantly increased. Kleemann
said that driving the plant with an attached
screening unit onto a drop-centre loader was
considerably easier. In addition, the screening
unit is equipped with a hook lift system,
which enables the unit to be easily transported
separately.
KPI-JCI and Astec Mobile Screens’ latest
innovations include its new-generation
Vanguard Jaw Crusher. It is said to reduce
maintenance and increase performance.
The optional tramp iron relief system
enables adjusting the closed-side-setting on
the fly while providing overload protection
from tramp iron events. Increased stroke,
toggle angle and flywheel inertia claims
to provide up to 25% more production,
greater efficiencies and lower fuel costs over
competitive models.
Components such as the common
flinger collar, stress-relieved base frame and
machined saddle also aim to help reduce cost
of ownership.
■
Making an impact
IRock’s latest offering is the TC-20 tracked impact crusher that combines a large feeder,
a high performance four-bar impactor and heavy duty components, resulting in a unit that
the company says delivers a high degree of efficiency, reliability and productivity, with a
maximum throughput of 500 tonnes/hour. According to IRock, the new crusher produces
a uniform cubical product and the hydraulically adjustable aprons provide improved control
over product sizing. The TC-20 can process soft to medium rock, recycled concrete and
recycled asphalt. Power comes from a 328 kW (440 hp) Cat C-13 diesel certified to Tier 3.
The TC-20 features a fixed, Hardox hopper with a 15-cubic-yard capacity, paired with a
1.3 x 4.9 m (4.3 x 16 ft) vibrating grizzly feeder, which has 18.7 mm (0.75 inch) liners
on the pan and side walls. The TC-20 features a standard crusher bypass chute to reduce
unnecessary wear on the crusher. With this chute, fines that fall through the grizzly feeder
can either bypass the crusher and mix back in with the crushed material or be removed via
the dirt conveyor with a simple adjustment to the flop gate.
The TC-20 also incorporates IRock’s exclusive Rock Box, an innovative alternative to
discharge chutes found on similar units. This uses a shelf system with abrasion resistant
wear bars that allow crushed material to build up and act as a wear liner, which cuts down
on costly labor and wear parts.
IRock’s TC-20 tracked impact crusher was another debutante at the Las Vegas Convention Center
Also new from IRock is the TS-620 scalping screen
that is said to be ideal for large-scale scalping
applications in quarrying, recycling, construction and
demolition.
