Multifrequency
Sieve Analyzer
MSA-W/D-200
Laboratory
four-cell
vibratory mill
VM-4
Purpose
The apparatus is
intended for wet
and dry sieving
of polydispersed
suspensions,
fine-grained
slurry, and dry
granular
materials with
(or without)
additional
washing of
material on the
sieves.
Maximum
coarseness of
material to be
sieved is 3 -5
mm. Mesh varies
in size from 500
-1000 mm to 20
μm in the basic
sieve kit.
For production
of slime
analysis the
sieve kit is
supplied with
additional
meshes: 15 and
10 μm.
The analyzer is
supplied with an
additional
grinding block
for preparation
of tests for a
chemical
analysis, which
includes a
four-cell
vibratory mill.
Application Area
Determination of
particle size
distribution and
control of
screening,
grinding,
classification
and desliming
processes on
beneficiation
plants of ore,
coal and
non-metallic
minerals.
Determination of
particle size
distribution the
processes of
powder
metallurgy and
cement plants.
Description of
Multifrequency
Sieve Analyzer
The main
working
element of
the unit is
a vibratory
system
generating
multifrequency
oscillations
of a sieve
kit with
controlled
vertical
peak-to-peak
displacement.
The
oscillatory
circuit of
the
apparatus
includes two
electrical
vibration
exciters and
a
proprietary
mechanical
vibration
converter (KROOSHERTM)
transforming
high-frequency
linear
oscillations
of an
elastic
support of
the exciters
into
multifrequency
nonlinear
vibration of
the sieving
surface.
Each sieve
experiences
also
torsional
oscillations
in the
horizontal
plane.
When
generating
multifrequency
nonlinear
vibration,
the surface
of each
sieve
oscillates
with
frequencies
of a wide
range (from
20 to 1000
Hz) and peak
sieve
accelerations
as high as
150 g, which
provides
effective
sieving of
polydispersed
materials
and
effective
cleaning of
sieves.
For sieving
suspensions,
the unit is
provided
with a
washing
module
located in
the upper
part of the
apparatus.
The spraying
device
distributes
the stream
of water
along the
whole
sieving area
and washes
the material
on each
sieve. The
flow rate of
water for
spraying is
established
depending on
material and
charge
properties.
The sieves
are
removable.
Worn sieves
could be
replaced
without
replacement
of the steel
frame.
The washing
module (or
cover) with
the kit of
sieves is
tightly
pressed to
the
vibratory
platform by
a spring-
loaded
clamping
device.
The sieve
analyzer is
equipped
with a
remote
programming
control
panel, which
allows to
set the
required
values of
vibration
exciter
frequency,
sieve kit
amplitude
and sieving
duration.
The grinding
block
includes a
four-cell
vibratory
mill and is
adjusted on
the same
vibratory
platform.
General
views of two
modifications
of the
multifrequency
sieve
analyzer and
the
laboratory
four-cell
vibratory
mill are
shown below.
|
|
Sieve analyzer for slurry sieving |
Sieve analyzer for dry sieving |
Laboratory four-cell vibratory mill |
|
Fill in an
application
Questionnaire
Specifications
|
Sieve
diameter |
200
mm |
|
Max.
number
of
50-mm
high
sieves
in
the
kit |
8 |
|
Maximum
coarseness
of
sieved
material |
3-5
mm |
|
Min.
mesh
size
of a
standard
sieve |
20
μm. |
|
Mass
of
polydispersed
mixture
charge |
100
–
1000
g
|
|
Min.
mesh
size
of
sieve
for
sieving
slurries |
10
μm |
|
Mass
of
fine
slurry
charge |
up
to
20 -
50
gram
of
dry
material |
|
Duration
of
sieving |
3-10
min |
|
Flow
rate
of
water
for
wet
sieving |
5–12
l/min |
|
The
volume
of
milling
cell |
305
cubic
cm |
|
Duration
of
grinding |
5-10
min |
|
Rated
power
of
each
vibration
exciter |
170
Watt,
rotation
speed:
3000
rpm
at a
current
frequency
of
50
Hz. |
|
Single
phase
power
supply
voltage |
voltage110/230
VAC |
|
Weight
of
apparatus
with
the
sieve
kit |
|
|
for
slurry
sieving |
64
kg |
|
for
dry
sieving |
61kg |
|
Weight
of
the
laboratory
four-cell
vibratory
mill |
61kg |
Multifrequency
Sieve
Analyzer
Distinction
and
Advantages
-
A
vibratory
system
generating
multifrequency
oscillations
of a
sieve
kit with
peak
accelerations
of the
working
sieve
surface
up to
150 g.
-
Possibility
of
sieving
materials
that
cannot
be
sieved
in
conventional
equipment.
-
Continuous
self-cleaning
of the
sieves.
If
necessary,
additional
cleaning
of
sieves
may be
performed
in the
unit.
-
A large
one-time
charge
of
fine-dispersed
material:
up to
1000
gram for
dry
sieving
and up
to 200
gram for
wet
sieving.
-
A remote
program
control
panel,
that
allows
automatic
multi-stage
continuous
sieving
with
different
values
of sieve
vibration
frequency,
amplitude
and
sieving
duration
for each
sieving
stage.
-
Two-layer
sieves
with
substantially
extended
service
life.
-
A
sprayer
module
allowing
continuous
flushing
of the
oversize
fraction
on each
sieve in
the
process
of
sieving.
-
Wet
sieving
of pulp
taken
off
directly
from
continuous
process
flowsheet.
Elimination
of
manual
sieving.
-
Sieving
of
fine-dispersed
slurries
on 15
and 10µm
sieves
on the
same
unit.
-
Wet
sieving
of
water-soluble
potassium
salts
with
flushing
of the
oversize
product
with
saturated
salt
solution.
-
Use of
the
drive of
multifrequency
sieve
analyzer
for
adjusting
of the
four-cell
vibratory
mill and
preparation
of
samples
for
chemical
analyses.
-
Use of
the
multifrequency
sieve
analyzer
for
physical
modeling
of wet
and dry
sieving.
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