WORLD PROSPECTS_visuals 23/08/2016 09:10 Page 2
WORLD PROSPECTS
environmental damage, pollution or ecological
degradation, the levels of nitrate in water are
usually monitored – as high nitrate levels can
render water unsafe for drinking. “By removing
the possibility of nitrate leaching from blasting
chemicals underground, mines can reduce the risk
of groundwater contamination as water drains out
of working areas. At the same time, where mines
are making efforts to recycle water from
underground, lower nitrate levels will enhance the
overall quality of recycled water and increase its
applications on and off the mine site.”
Emulsion explosive is part of a growing range
of underground services being innovated by
BME, including up-hole blasting technology,
vertical pipelines to convey emulsion direct
from surface to working levels, mobile chargers
and pumps, and control systems to facilitate
real-time communication between underground
operations and surface systems.
www.bme.co.za
Final commercial launch for P&H hybrid shovel
he new P&H 2650CX hybrid shovel from
Joy Global which was first announced
during MINExpo 2012, will now be
launched commercially at MINExpo 2016. The
company says that the design “combines the
advantages of an electric rope shovel and a
hydraulic excavator, taking surface mining into a
new era of efficiency and flexibility.” The hybrid
shovel was influenced by customer feedback
and is targeted to offer up to a 15% reduction in
the total cost of ownership, compared to similar
sized hydraulic excavators. This incorporates up
to a 25% reduction in fuel consumption, up to a
3% availability advantage and up to a 10%
decrease in maintenance and repair costs. The
P&H 2650CX pilot machine has been tested and
validated in a copper application in Arizona. The
machine transferred into the mine’s production
plans in June 2016 and continues to achieve
strong results, according to Joy Global.
The diesel-powered machine leverages both
electric and hydraulic components to maximise
performance and reliability. The twin diesel
engines (MTU or Cummins) eliminate the
requirement for an electrical cable and the
unique advantage that the hybrid shovel will
offer over competitors is its significant reduction
in fuel consumption, thanks to the Joy SR Hybrid
Drive system. Multiple systems are driven by the
electric SR motors which enable regenerated
power to be captured and utilised, resulting in
efficient machine operation. The hoist, swing,
and crowd functions, all driven electrically, allow
for a 50% reduction in the number of hydraulic
routings; and a 50-70% reduction in onboard
hydraulic fluid. The articulated clamshell bucket
and propel, or travel, motion are the only
systems driven hydraulically.
The motors in the Joy SR Hybrid Drive system
feature high energy efficiency, evenly distributed
loads and have no commutator or brushes,
making the motors almost maintenance free.
They also have low inertia for higher speed
capability and quicker dynamic response. The
drives in the Joy SR Hybrid Drive system feature
simple and robust electronic controls, with the
complete drive in one unit; and have a modular
design.
The machine’s attachment features a fixed
boom, twin rack and pinon handle and a
hydraulically articulated clamshell bucket.
Multiple dig paths can now be accommodated
with this new front end architecture such as
perform ing a drop cut and flat floor clean-up.
The hydraulic power contributes to high
breakout forces throughout the range of 6-16 m
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6 International Mining | SEPTEMBER 2016
bench heights the
machine is
designed for. The
2650CX allows for a
height of cut of 16.1
m; radius of cut of
17.7 m; dumping
height (with max
reach) of 9 m; floor
level radius of 14 m;
and tail swing
radius of 8.4 m.
The fixed boom,
another proven
P&H system,
reduces the amount
of mass to hoist
compared to a
hydraulic excavator, which allows for less fuel
to be consumed. Its extended reach means
increased safety through the machine’s position
relative to the bank, and an increased range for
truck spotting. It is capable of double sideloading and can accommodate truck sizes from
135-360 t. The handle provides a stable dipper
trajectory with superior fill factors; and is an
already proven system in cold, severe iron ore
applications. This system offers maximum
cutting forces and its structure is designed to
resist side loads.
A dual planetary system located in the
interior of the hoist drum eliminates externally
mounted transmissions and optimises use of
deck space. A drum lock design is also fully
integrated into the motor allowing quick and
easy engagement.
Each crawler frame is equipped with a high
ratio, high torque planetary gearbox. Each
gearbox is powered by two axial piston
hydraulic motors and is splash lubricated.
Spring-set hydraulic release wet multi plate disc
brakes are used, one per motor. Bottom rollers
(seven each side) are oversized, fully hardened
and automatically lubricated. Top rollers (three
each side) are sealed and maintenance free. The
machine also features the P&H DELTA Drive low
tension sprocket drive system with heavy duty
cast crawler shoes.
The cab of the 2650CX was designed through
Voice of the Customer interactions with
operators from various mine sites around the
world. The seat and armrest configuration are
the same as the P&H electric rope shovels to
provide an ergonomic and comfortable
environment while operating. Technology is at
the forefront as the machine is equipped with
Joy Global’s PreVail remote health management
system, and its Payload and Track Shield, which
is a collision detection and mitigation system.
Track Shield is the only automated operatorassist technology that detects and helps prevent
a bucket from striking the crawler. The included
Mine Air System (MAS) climate control system
provides air conditioning, heating, air filtration,
and pressurisation to the operator cab. Featured
benefits include a rugged design specifically
engineered for surface mining applications
which is also modular for unmatched changeout speed and convenience.
www.joyglobal.com
P&H 2650CX key figures
Capacity
Nominal payload
Nominal bucket capacity (hard rock)
Optimum truck size (4-pass load)
Engine requirements (Tier II or Tier IV)
MTU
Cummins
Rated power
59 t
31.1 m3
218 t
12V Series 4000
QSK50
2 x 1,193 kW @ 1,800 RPM
F