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PRODUCT News
72
MODERN MINING
May 2015
Index to advertisers
Actom
69
AEL
OBC
Afrimat
11
Air Liquide
70
ALCO-Safe
68
Allied Crane Hire
65
Aury Africa
51
Babcock Equipment
22
Barloworld Equipment
33
Barloworld Power
FC
Bell Equipment Company
30
ContiTech
IBC
DRA Projects SA
32
Dräger South Africa
IFC
Electra Mining Botswana
45
Flexicon Africa
13
FLSmidth
63
JOY Global
43
Krohne
71
Loesche SA
67
M & J Engineering
59
MDM Engineering
17
Midas Group
16
MMD Mineral Sizing
55
Novatek
14
Osborn Engineered Products
27
PANalytical
18
Robor
2
Sandvik Mining
56
Sandvik Mining Systems
44
Sanitech
61
SCAW Metals Group
36
Sedgman
9
SEW Eurodrive
58
SP Mine Safety SA
7
Stefanutti Stocks Mining Services
15
Voith Mining & Metals
54
Weir Minerals Africa
48
Wirtgen SA
40
WorleyParsons
19
Multotec has won a repeat order for two
overbelt magnets sold into a coal mining
application in the Witbank/Middelburg
coalfields. “This order follows on from the
successful commissioning two years ago of
two overbelt magnets at another coal mine
in the same group,” says Willem Slabbert,
Process and Applications Manager at
Multotec.
The magnets will remove tramp metal
from run-of-mine material in order to pre-
vent it from entering coal gasifiers.
“This is a critical application as the coal
gasifiers have very stringent tramp metal
removal specifications,” Slabbert says.
Tramp iron traditionally removed from
coal carrying conveyors includes sections
of continuous mine core breaker teeth,
conveyor belt idlers, belt joints, roof bolts,
The BMG Group in conjunction with DRA
Global has successfully supplied and
installed a mill lubrication system includ-
ing Motor Control Centres (MCCs) and
Ball mill lubrication system for high altitude mine
The Kumtor gold mine in Kyrgyzstan where the
BMG Group has supplied and installed a mill
lubrication system.
Programmable Logic Controllers (PLCs)
for the ball mill at Kumtor gold mine in
Kyrgyzstan.
“Due to their extensive experience with
mill control systems, system refurbish-
ment and with BMG lubrication systems in
particular, DRA Global were contracted to
provide the MCCs and control solutions for
the mills,” says Jan Grobler, BMG National
Product Manager: Instrumentation.
One of the biggest challenges BMG
faced for this project was the altitude
(4 000 m masl) and ambient temperatures
which can plummet to as low as -50 deg C
in winter. This required some unique
design features to enable the system to
operate efficiently and reliably.
“We have an excellent reputation of
providing solutions across many sectors of
industry, and we are particularly pleased to
be able to enter the Asian mining sector,
and look forward to an ongoing relation-
ship with DRA Global and Kumtor gold
mine. Most mining operations established
in the 1970s will soon be looking at equip-
ment upgrades, and we believe that the
BMG Group is well positioned to become
the preferred supplier of quality mill lubri-
cation systems in addition to our offering
of professional technical support,” says
Grobler.
Jan Grobler, BMG, tel (+27 11) 793-5562
Repeat order for two overbelt magnets
metal plates, tools, tin cans and other such
debris.
Multotec supplied the original two
overbelt magnets in September 2012, with
the latest order representing the second
phase of an ongoing expansion project.
Stuart Cullum, Process Engineer, explains
that the width of the conveyor belts in this
coal mining application is 1,8 m, with the
overbelt magnets themselves being 5,1 m
wide and 2,45 m high. They incorporate
the latest technical specifications of the
client, including pulley design, control and
instrumentation.
The overbelt magnets are suspended
over the conveyor on gantries for easy
removal for maintenance purposes.
Features include an automatic belt-driven
self-cleaning system that dumps the tramp
iron into collection bins at the side of the
conveyor.
The latest two overbelt magnets were
transported to Mpumalanga on lowbed
trucks and weigh 28 t each without cool-
ing oil. The latter is added once on site
using an oil tanker, with a final total weight
of 33,7 t for each overbelt magnet. As per
client safety specifications, the overbelt
magnets have eight safety chains rated
and certified for a load of 16 t each. This is
double the normal requirement.
Slabbert confirms that these are the
largest overbelt magnets available in the
Longi-Multotec range. “Through our part-
nership with Longi, Multotec now has
access to a comprehensive range of off-
the-shelf air-cooled overbelt magnets for
underground tramp metal removal, with
the option of flame proofing.”
Bernadette Wilson, Multotec Group, tel (+27 11) 923-6193