WORLD PROSPECTS_visuals 23/08/2016 09:10 Page 3
WORLD PROSPECTS
Marcotte develops ultra-high scissor lift
arcotte Mining says it continues to
push the boundaries of innovation
with the development of an ultra-high
scissor lift that exceeds standard
underground capabilities. Designed to provide
a safe work platform for installation of
services in tunnel headings, the UHL6000
Ultra High Lift Carrier reaches heights of 20 ft.
Marcotte Mining’s “in-house made solution”
was in response to a client’s special request.
From initial consultation, to design, build and
delivery, the entire process took an
impressive 10 weeks. “Throughout the
designing and manufacturing process, any
and all input from us on the unit was met with
open arms and enthusiasm by Marcotte
Mining”, said Kevin Burkholder, Equipment
Manager at Cementation. “The entire
Marcotte staff from Shop Personnel to
Management were great to deal with and
M
open to any suggestions. The unit was
delivered on time, and met all expectations.”
Special safety features incorporated into the
UHL6000 include outrigger jacks for added
stability, an enhanced fire suppression system,
side shift feature deck, and refined vertical and
horizontal capabilities. “As the mining industry
evolves and the needs of clients change,
succe ss lies in our ability to offer engineered
solutions to suit our customer’s needs,” said
Ben Mageau, Business Development Manager at
Marcotte. “Marcotte Mining has become a
recognised leader for design strength and
performance in the scissor lift utility market,”
said Alicia Woods, General Manager at Marcotte
Mining. “The development of the UHL6000
carrier strengthens our reputation and reaffirms
our position as an innovator in the underground
mining industry.”
www.mar-inc.com
Voith SlipSet coupling limits torque load
hen crushing mined rock and materials,
uncrushable objects constitute a severe
risk for the production process as well as
the installed equipment. In order to limit
torque load without disrupting operation,
Voith designed its SlipSet coupling to
temporarily slip in the event of an
overload situation and thus act as
a shock absorber. The company’s
recently developed Coupling
Monitoring System (CMS 310)
offers further benefits by
providing real time status
information as well as performance
analyses; displayed in a particular web
interface, on a HMI panel or integrated into an
already existing supervision system.
When getting stuck in the crushing chamber or
between the rollers, too hard materials or too
large pieces cause the system to stop running. As
the motor and the momentum of the driveline still
deliver torque, the resulting overload overheats
the motor or leads to the collapse of the driveline.
To avoid cost-intensive repair works or downtime,
belt drives can be replaced with direct drives
protected by an integrated torque limiting coupling.
Voith SlipSet couplings consist of a twin-walled
W
hollow sleeve with friction generated by
pressurised hydraulic oil. In case of a torque peak
which exceeds the preset torque limit, it will
instantly slip and protect the equipment from high
stresses. If the blockage persists, the
coupling slips until the
rotational energy is
completely absorbed and
the drive can be stopped to
enable the blockage to be
cleared. On a scale of 1 to
20,000 kNm the trigger point
for slipping can be set at 50 to
100% of the maximum
load. Due to its compact
design, the SlipSet coupling
is easily installed at the optimum
position in the driveline.
As it separates the input torque from the output
torque of the driveline, the slipping feature of the
SlipSet coupling paves the way for a detailed
monitoring of the coupling and the occurring
forces around. In order to increase product
intelligence and enable nonstop performance
supervision, Voith developed the PLC-based
Coupling Monitoring System CMS 310. It is based
on the calculation of the torque limiting coupling
RCT implementing Guidance and Teleremote
C
10 International Mining | SEPTEMBER 2016
In addition to this, the site’s drilling and blasting
practices, designed to ensure operator safety,
also meant about 25% of ore remained in the
stope, out of safe reach from the loader under
manual operation. Upon using RCT’s Guidance
simulator to review Costerfield’s mine site plan
layout it was discovered that many areas that had
originally been scaled back after being deemed
inaccessible, were in fact accessible with
machines equipped with RCT’s Smart Technology.
Implementing RCT’s ControlMaster® Guidance
and Teleremote systems on its Sandvik LH203
has enabled the operator to control the machine
from the safety and comfort of an RCT-built
operator control station underground. The
systems allow operators to successfully navigate
the previously inaccessible narrow drives at a
greater speed, with ease, all while avoiding
contact with the walls; eliminating machine
damage. The operators’ ability to switch from
Guidance to Teleremote mode to load the once
unattainable ore in the bucket from the stope,
s
anadian-based company Mandalay
Resources has implemented RCT’s
ControlMaster® Teleremote and Guidance
Systems to substantially increase ore recovery at
its Costerfield gold-antimony mine in Victoria,
Australia. The Costerfield mine has a narrow vein
operation which requires drives to be kept to a
minimum width to minimise ore dilution for ore
processing efficiency. It was this requirement that
made reaching ore in some areas quite difficult.
input and output rotational positions. The
measurements are made by inductive sensors
mounted on each side. If the coupling slips, there
will be a pulse difference between the sensors.
The difference in relative position is recorded and
recalculated to a slip angle in real time.
Once a slip occurs, the CMS informs the
operator about the incident via a web interface or
an optional HMI panel for closed systems.
Depending on the respective information, the
operator can either adapt the power input,
material feed or initiate a controlled shut down.
This ensures the maximum output of the crusher
since it helps the operator to align the motor
power with the full capacity of the machine.
The used Profinet communication standard
makes it easy to individually integrate relevant
data from the Voith CMS into existing supervision
systems. Thus, it requires no particular monitoring
activities – still offering the possibility of
accessing a history log for in-depth analyses,
product settings as well as product information in
the web interface provided by default.
As the Voith CMS also documents the number
and length of slips of the SlipSet coupling, it
proactively highlights the upcoming need for
service. Therefore, coupling maintenance can be
aligned with the overhaul of further components
to not only prevent unplanned downtimes but also
reduce planned standstills. www.voith.com