10
MARCH-APRIL 2014
d
&
ri
CRUSHING
& SCREENING
Ever greater screening
efficiency
Metso also used ConExpo to introduce the new Lokotrack ST2.8 tracked two deck screener
that makes use of the company’s new Super Stroke Screen, which it says gives 20% higher
stroke and 20% more screening area on the second deck. High stroke translates into
power in material separation and a large screening area of 7.4 m
2
(80 ft
2
) and dimensions
of 4.8 x 1.5 m (16 x 5 ft) ensures that precision is achieved during fines separation. The
screen itself can be angled from 10 to 17 degrees.
In operating configuration, it is 14.4 m (47.3 ft) long, 11.2 m (49.7 ft) wide and 3.5 m
(11.6 ft) tall, The machine’s conveyors and chutes can handle up to 400 tonnes per hour
and equipped with an apron feeder, the ST2.8 weighs in at 33 tonnes.
According to Metso, typical applications include topsoil separation, demolition, quarries
and sand hills. The new screen performs at its best when the feed material is sticky, wet
and difficult, and high capacity is required, Metso went on to say. The ST2.8 can also cope
with metallic material with the addition of a magnetic separator and drums.
Power comes from a Caterpillar C4.4 diesel delivering 75 kW (100.6 hp) and the use
of a new hydraulic system has resulted in a reduction in fuel consumption of 25%. The new
Lokotrack can also be powered using an external electricity supply and using an intelligent
control system.
On-site setup is easy with no requirement for the use of a crane or special tools. Push
button control and Service DVD makes Lokotrack machines safe and easy to operate, an
essential feature when the machines are used in the rental sector where high production
and up-time are a requirement.
a new look from Powerscreen. The traditional
Powerscreen green colour is maintained, while
a dark grey colour is adopted on the chassis
and conveyors.
The Premiertrak 300 jaw crusher
features the new hydrostatic drive system
option allowing it to reverse and unblock
or run continuously in reverse for asphalt
applications. Powerscreen said it was designed
to run at low engine rpm, resulting in fuel
efficiency and low noise emissions, and
therefore it is ideal for urban sites. It features a
vibrating grizzly feeder (VGF) set with 50 mm
(2 inch) bofor bar on the top deck and 30 mm
(1.2 inch) mesh on the bottom. The closed side
setting (CSS) can be set to 40 mm (1.6 inch)
while running in both asphalt and recycled
concrete applications.
Other benefits of the machine are said to
include large clearances in the bypass chute
to improve material flow and reduce the
chance of blockages in sticky material. Also,
Powerscreen claims a large under crusher
clearance and full tunnelling to reduce the
chance of blockage as a result of re-bar build
up. A hydraulically lowering conveyor is said
to offer excellent access to reduce downtime
should a blockage occur.
The Trakpactor 320SR is a mid-sized
horizontal impact crusher redesigned with
some key enhancements that Powerscreen
said would offer operators and contractors
excellent reduction and high consistency of
product shape for performance in quarry and
recycling applications. The plant is described
as capable of working in the most demanding
environments. The company said that features
included rapid set-up time, a fuel-efficient
direct drive system and output potential of up
to 320 tonnes/hour.
The plant features a recirculating conveyor
that raises for transport. The Trakpactor
320SR crusher has a quick-detach post-
screen section that converts it to a standard
Trakpactor 320 unit, which Powerscreen said
provided operators with versatility to use the
machine in a variety of different applications.
The Warrior 2100 screen is the first
screen to be designed by the company
with recycling firmly in mind and includes
Powerscreen’s Triple Shaft technology that
was first developed for the Warrior 2400.
This technology is designed so the screen box
is effective and efficient while maintaining
>
12
Metso’s new Lokotrack ST2.8 screen has been designed to be suitable for recycling applications as well as
multi-stage crushing processes
The J-1170 primary mobile jaw crusher and the 684
tracked mobile inclined screen from Terex Finlay
