MINERAL SEPARATION
The air-pulsed alljig ®
machines are
physically stable in
operation, allowing an
optimum jigging
stroke with minimum
energy consumption,
allmineral says
The mineral separation company said it would
supply two F/R type, single cut, side pulsed
alljig ® units with enhanced shaft system and one
M(UB) type, 2 cut, under pulsed alljig ® . The latter
incorporated the company’s “state-of-the-art
poppet valve system that significantly reduces air
consumption”, allmineral said.
“The M(UB) unit will furthermore be fitted with
the allscan ® chamber monitoring system for the grains graded by
density. The jigs end
up separating the
lighter yield from the
heavier ore in the
stratified material bed.
“The air-pulsed
alljig ® machines are
physically stable in operation, allowing an
optimum jigging stroke with minimum energy
consumption,” the company said. “The jigging
motion used to separate the particles is wear-
free and induced by air, allowing the stroke
motion (frequency, amplitude and shape) to be
adjusted within a wide range of operating
parameters.
“Sensors are used on alljig ® systems to
enhanced operation,” it said.
Assembly and erection on site is expected this
month.
The patented alljig ® process sees feed
material initially fluidised with pulsed water, with automatically monitor and control the discharge,
with their signals captured and processed
electronically. This allows the volume of heavy
product fed into the jigging machine to be
discharged with precision.”
Round or rectangle?
In density separation, Kwatani custom designs
and manufactures a range of vibrating equipment
to meet many feeding and screening
requirements. Its individual machines can weigh
less than a tonne or up to as much as 50 t and
handle throughputs of 7,000 t/h of heavy metal
ores.
The South Africa-based company has a
materials testing laboratory to assist with the
selection of separation equipment. Here,
materials are analysed, and tests conducted
under simulated production conditions to help
determine the appropriate machine size,
optimum screen openings and machine settings
for any given application.
Kwatani has a number of rectangular and
round separators suited to specific processing
applications.
The former has a horizontal gyratory motion
that sifts, rather than forces material through the
screen. This gentle action minimises screen tears
from foreign objects, according to the company.
Its round separators, meanwhile, feature a
broad range of wet or dry, fine or coarse, heavy
or light products and can be built up with as
many as four screen decks for simultaneous
separation into five fractions.
Kwatani’s vibrating screens and feeders are
continuing to find a market in the mining
industry, with several orders recently secured
MAY 2019 | International Mining 17