Page 22 - Chemical Technology
Basic HTML Version
Chemical Technology •January 2013
20
FOCUS
on pumps, valves and actuators
Weir Minerals Africa
has demonstrated
its commitment to the ongoing uplift-
ment of skills in the South African mining
industry with the recent donation of a
cyclone and slurry pump to the School
of Chemical and Minerals Engineering
within the Faculty of Engineering at the
Potchefstroom Campus of the North-West
University. The cyclone and pump have
been made available for the use of the
Masters students.
“The 1,5/1AH Warman® slurry pump
and 100CVX Cavex® cyclone which
were donated will effectively introduce
the students to Cavex® and Warman®
technology while they are still studying,”
JD Singleton, product manager: cyclones
and engineered systems at Weir Miner-
als Africa, says. “Having this technology
readily available will provide the students
with invaluable hands-on experience giv-
ing them a genuine advantage when they
ultimately enter the industry as profes-
sional engineers.”
Weir Minerals Africa donates cyclones
to NWU's Potchefstroom campus
For more information
contact Rene Calitz
on tel: +27 11 929 2622;
or email:
Warman AH 1.51 slurry pumps at the assembly
area at Weir Minerals Africa’s Alrode factory.
Offering end-to-end solutions for all min-
ing, transportation, milling, processing and
waste management activities, Weir Minerals
Africa has accompanied the donation with
a pump curve and capacity chart for the
cyclone, featuring various vortex finder op-
tions, and has made its technical team avail-
able for assistance and consultation should
the university require this.
“Cavex® cyclones offer a unique solution
for slurry applications in the mining and
mineral processing industry and have been
designed to deliver maximum efficiency and
capacity, while providing longer wear life
than conventional designs,” Singleton says.
“These cyclones provide enhanced de-
watering and desliming efficiency, reduced
product loss, improved product recovery and
increased circuit capacity by minimising the
quantity of material escaping to the under-
flow or overflow streams.
“Their distinctive design provides a natu-
ral flow path for slurry material. The unique
shape has no sharp edges, no square
corners and allows the feed stream to blend
smoothly with the rotating slurry inside the
unit, minimizing localised wear on the feed
chamber and vortex finder. These design im-
provements result in lower operating costs
and fewer cyclones required for a given duty.
The end result is greatly reduced turbulence
creating more even wear, longer life and
more efficient classification.”
The automatic and precise dosing
of ink and sealant, 24 hours a day
every day, is the role of a British-
made Verderflex
®
tube pump at
an automotive industry supplier in
South Africa.
The process has a direct bearing
on the quality of the finished product
as the combination of the two sub-
stances is used to seal windscreens.
It ensures there is no possibility of
moisture ingress between the two lay-
ers of glass into which a tinted plastic
laminate sheet is inserted. Any imbal-
ance in the dosing would weaken the
seal and result in the clarity of the
windscreen being compromised.
Verderflex tube pumps are widely
specified for a variety of applica-
tions in the automotive industry
worldwide. In addition to pigment
and glue dosing, they are used for
coatings and acid transfer and to
feed lapping solution.
The proven capability of the
Verderflex auto control peristaltic
pump therefore made it an obvious
choice for Durban-based Reliable
Electrical Services. Remote stop /
start and speed control allowed it to
be easily integrated into the auto-
mated windscreen sealing system.
This model of Verderflex tube
pump, with brushless dc motor,
provides flow rates from 0,8 to 1
312 ml/min at speeds from ten to
250 rpm. Speed and flow rate are
infinitely variable and the value of all
adjustable parameters are indicated
on a keypad with twin line alpha
numeric display.
Easy tube loading is a charac-
teristic of this Verderflex scientific
cased peristaltic pumps. They are
also stackable, self priming and can
run dry.
Source:
Environment/
energy savings
focus helps
promote energy-
efficient pumps
A cluster
comprising four
Cavex 100CVX
cyclones and
Isogate slurry
valves.
