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May 2016
MODERN MINING
57
feature
CRUSHING, SCREENING
AND MILLING
S
ince replacing equipment at its two
operations with Trio
®
crushers and
screens from Weir Minerals Africa,
CNC Crushers Roadstone has en-
joyed uninterrupted production,
ranging from 1 000 to 1 200 tonnes of aggregate
a day for road construction in various areas of
North West Province.
Weir Minerals Africa first entered into its
long-standing business relationship with CNC
Crushers Roadstone’s owner, Carl Crous, at
the beginning of 2014. This is when the origi-
nal equipment manufacturer (OEM) installed
a Cavex
®
400CVX10 cyclone and a Warman
®
WBH
®
100 centrifugal slurry pump at one of his
operations, known as Shaft 5. Crous says that he
was so impressed with the overall performance
of the equipment that he decided to invest in
a screen and two crushers from Weir Minerals
Africa. Crous’ other operation, Shaft 4, is now
also using a Trio
®
TC series cone crusher.
JD Singleton, Weir Minerals’ General
Manager for Trio
®
products in Africa and
Middle East, says like all Trio
®
equipment, the
rugged design makes these crushers ideal for
African mining environments.
CNC Roadstone is using a Trio
®
TC36SH
(short head) and Trio
®
TC51S (standard head)
in its operations.
The Trio
®
TC36SH weighs 12 000 kg and
has a feed opening of between 100 mm and
180 mm, as well as a head diameter of 914 mm.
It has a maximum power capacity of 90 kW
and a maximum capacity of between 27 t/h
and 186 t/h.
The Trio
®
TC51S has a head diameter
of 1 295 mm and weighs 22 500 kg. It has a
feed opening of between 65 mm and 135 mm,
and a maximum power of 200 kW. The unit
has a maximum capacity of between 36 t/h
and 255 t/h.
Crous says he has been very impressed
with the tonnages being achieved using the
Trio
®
cone crushers. These have exceeded
the initial production requirements, leaving
the operation with ample spare capacity, if it
Trio crushers
show their mettle
Trio TC36 short head cone
crusher in a tertiary
crushing application.
A producer of aggregate frommine waste rock dumps
is not only optimising its production in Stilfontein using
its range of Trio® comminution equipment, but has
also lowered its total cost of operation by entering into
an extended service level agreement (SLA) with Weir
Minerals Africa.
should be required.
The agg r ega t e
producer’s first piece
of Trio
®
screening
equipment was a
TIO5162 inclined
double deck screen.
Singleton says
Trio
®
TIO Series
screens generate
their motion via
three timed shafts
w i t h e c c e n t r i c
counter-weights.
The combination
of three shafts pro-
vides an oval strike
wi t h ad j u s t a b l e
amplitude, speed and operating angle that
are determined by application, feed size and
gradation. The vibrating unit uses an oil bath
lubrication arrangement.
The 1 560 mm by 4 880 mm Trio
®
TIO5162
screen operating at CNC Roadstone weighs
6 452 kg, and is driven by a 22 kW motor at
between 675 rpm and 850 rpm, screening
10 mm to 19 mm material.
Weir Minerals Africa also built the mounting
frame for the screen to accommodate its instal-
lation in an existing footprint, while the cone
crushers were installed on existing concrete
plinths, with the steel adapter bases manufac-
tured by the OEM, thus further reducing the
capital outlay of the equipment.
While the predictability and reliability of
the crushers and screen are very strong selling
points for Weir Minerals Africa, this opera-
tion, specifically, has maximised the operation
of its Trio
®
comminution equipment by enter-
ing into an extended service level agreement
with the OEM.
This agreement sees Weir Minerals Africa’s
technical field service personnel spend-
ing two full days a month at the operations
undertaking preventative maintenance
on the equipment.