international
construction
july-august 2014
QU
AR
R
YING
40
Efficiency imperative
radio controls.” The new Metso MH-
series hammers and MB-series booms
include five boom-hammer combinations
for jaw crushers and one for primary
gyratory crushers.
Attachment manufacturer Montabert
meanwhile has launched a new heavy-
duty range of hydraulic breakers. The
V65 provides variable-speed technology,
automatically adjusting its impact energy
and striking rate to match material
hardness. Designed for use on large
excavators ranging in size from 50 to 80
tonnes, the 5.6-tonne hydraulic breaker
delivers up to 950 blows per minute.
Recommended for use in quarrying
applications, especially those involving fragmented, heterogeneous
materials, the breaker’s energy chamber acts as a hydraulic shock
absorber, reducing pressure variations in the hydraulic circuits to
provide consistent energy to the breaker.
Standard features include a progressive start system, a blank-fire
protection system and an automatic lubrication system.
Crushing & screening
German manufacturer Kleemann has seen strong demand for its
Mobirex MR 122 Z impact crusher, one unit of which is currently
in action at Grange Quarry in the UK.
One of the largest producers of aggregates and ready-mixed
concrete in the south of Scotland and the north of England,
Grange Quarry has been working with Kleemann for a couple
of years.
“Since 2012, we have been working successfully with a mobile
Mobicat MC 110 Z jaw crusher and we are really impressed with
the quality of the crushed end product,” said Stuart Dodd, owner
and managing director. The Grange Quarry uses the mobile plant
to crush whinstone for road construction, with a maximum feed
size of 600 mm to 125 mm at an output of around 200 tonnes of
crushed material per hour.
The new MR 122 Z impact crusher has been in use since
October 2013 and crushes limestone breccia of 600 mm down to
a final grain of 60 mm.
Blasting straight
New guidance system for straight blast holes
Also in the UK, a Kleemann MC 110 Z
EVO jaw crusher is being put to work on
the remote Shetland islands.
The island archipelago is currently
experiencing an oil and gas boom, as gas
fields are explored 125 km north-west
of the islands. In Sullom Voe on the
Shetlands the need for crushed stone is
rising rapidly to support this economic
growth.
EMN Plant. extracts a type of granite,
granodiorite, which is predominant in the
Scatsta quarry. The stone is naturally hard
and abrasive, which is why Ellis Nicolson,
a director at EMN Plant Ltd, invested in
a new jaw crusher.
The unit can crush a feed size of up to 1000 mm down to a grain
size of 100 mm in a cubic shape. The crusher can also process
recycled concrete.
“Our stone has a high level of fine grain. This is why we were
looking for a plant with good preliminary screening. Kleemann
provided an excellent solution with the MC 110 Z EVO,” said
quarry manager Craig Dickie.
Winning combination
In Nigeria, Asphalt Unity Construction now operates a Sandvik
mobile crusher and screening combination made up of a UJ640
jaw, together with US440i and UH640 cone crushers to work
alongside two QA451 Doublescreens.
The company specialises in crushing basalt and granite to be sold
to building contractors. The jaw and cone crusher combination
work to break down the materials to 25mm from a maximum
feed size of 975mm.
Asphalt Unity also operates a QA451 triple-deck Doublescreen.
The advanced triple deck system enables operators to make
changes to the drive, angling, vibration and meshes of each screen
box, which enables versatility in size and specification of the
finished products.
Powerscreen, part of Terex Materials Processing, launched
four new machines at this year’s Hillhead exhibition. New to
the catalogue are the Powerscreen Premiertrak 300 HA jaw
crusher, Powerscreen Warrior 2100 screen, and the Powerscreen
Premiertrak 600 diesel electric jaw crusher, which feeds the new
Powerscreen Maxtrak 1150 cone crusher.
The Premiertrak 300 jaw crusher features a new hydrostatic
drive system option allowing it to reverse and unblock or run
The Warrior 2100 screen includes Powerscreen’s
Triple Shaft technology, designed so the 16’ x 5’
screen box is highly effective and efficient while
maintaining exceptional throughput productivity.
>
Doosan’s two
largest ADTs
now come with
Tier 4 final
engines, which
the company
says offer
fuel efficiency
savings.
F
innish manufacturer R
obit has
introduced a new product group for
creating straight blast holes. The line
consists of steel guide tubes and guide rods
with outer dimensions of 5
6
mm to 8
7
mm.
The lengths vary from 1.8
m to 6
.1 m.
The products can be used as single starter
tube to increase the straightness of the
holes or they can be used as a full drill string
in conditions where the rock is so broken
that a single starter tube is not enough.
Liebherr’s TA 230 Litronic articulated
dump truck has a transport capacity
of up to 33 tonnes
