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The Laboratories of the Chair of Mineral Processing
Andreas Böhm
INTRODUCTION
Since April 2011 the laboratories of the Chair of Mineral Pro-cessing have been situated on the first and second floor of the so-called
Impulszentrum Rohstoffe (IZ-Rohstoffe)Montanuniversitaet Leoben Rosseggerstrasse 11aA-8700 Leoben
The laboratories are equipped to experimentally cover all the main aspects of comminution, physical and physico-chemical separation techniques as well as agglomeration related to pri-mary and secondary materials below a particle size of 40 mm. Samples of bigger particle size are prepared at selected crush-ing sites, sampled and transported to the lab. Depending on the units to be used in the technical center the maximum sam-ple mass reaches 1000 kg (for vertical roller mill and electro-static separator; maximum throughput rate mill 200 kg/h). The typical sample size, however, ranges from 20 to 50 kg. The physical laboratories for ore characterization (incoming samples) and efficiency evaluation of separation processes (products of tests and technical processes) are designed to op-erate on average sample masses smaller than 5 kg. Apart from measuring size and specific surface, the main interest focuses
on the evaluation of the distributions of physical properties of particle sets (like magnetic susceptibility, density and termi-nal velocity), the viscosity of slurries, optical microscopy in transmitted and reflected light and wet assays (especially iron). Automated mineralogy with respect to intergrowth analysis is done in cooperation with LKAB’s research center in Malmberget. We receive the QEMSCAN raw data and evaluate them by image analysis software at the Chair.Most of the flotation experiments are also performed at small scale of up to 2 l of suspension in order to search for the opti-
Figure 1: Left: street view of the IZ-Rohstoffe; looking northeast the reader watches the southern and western front (long side). Right: longitudinal section; yellow-shaded frame indicates the Mineral Processing laboratories
mum reagents regime. A large collection of surfactants, froth-ers and activators help to solve scientific and industrial prob-lems. The general technical figures of the technical center and the labs are summarized in table 1.
The non-scientific staff comprises three members trained in physical testwork and a mechanic responsible for test rig con-struction, electrics and maintenance. The scientific develop-ment as well as the education on the apparatus of staff mem-bers and also students is mainly the responsibility of the author. This includes selection of methods and new equip-ment as well as calibration of measurement devices. The lab is open to use for all members of the Chair, who are trained in handling the apparatus and in the related safety affairs. Pro-ject partners are welcome to accompany the tests.
258 Aufbereitung in Österreich i i i
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The challenge in operating a university laboratory is to pro-vide both a fully equipped scientific laboratory with best suit-ed measurement devices of defined accuracy and to educate our young students to make them future experts in mineral processing.
THE VISION
Every material intended for comminution and/or physical separation and/or agglomeration has its special features, pro-viding the link to the unique technical process needed to ob-tain economically successful products. It needs the thorough understanding of intergrown phases locked in irregular shaped particles on one hand and the special behavior of the technical apparatus on the other in order to succeed in the operation of a technical comminution or separation process.Careful experimental work thus forms the base at the begin-ning of all physical processing activities irrespective whether
science, plant/apparatus design or plant/apparatus optimiza-tion of special raw materials are in the focus. Apart from developing experimental methods, the main sci-entific idea behind the lab is to search for unambiguous fig-ures to characterize the material as well as the machinery in order to understand their physical interaction with respect to processing. This should lead to physically based and techni-cally reliable models for the prediction of the separation and comminution results and the selection and design of full scale equipment. Although the Chair also operates equipment at pilot scale size, it is the general intention to use test rigs at the smallest scale possible that allows the physical modelling of the real scale process. The low amount of sample mass needed keeps measurements accurate and cheap, avoids cross-contamina-tion of samples and intensive maintenance, helps to keep the tests safe and reduces efforts for environmental protection. Last but not least this allows accurate work within a reason-able time frame.
AREA, HEIGHT Processing technical center 1. Dry comminution and sample preparation (h: 7.5 m)2. Wet processing (h: 7.5 m)3. Magnetic separation and agglomeration (3.2 m)4. Drying (3.2 m)5. Electrostatic separation (7.5 m)
200 m², h: 7.5 m and 150 m², h: 3.2 m
Processing labs 1. Physical lab 2. Optical microscopy3. Chemical lab and wet assay4. Bentonite lab
166 m², h: 3.2 m
Climate chamber 1(electrostatic separation) 28 m², T: 20–60 °C
Climate room (bentonite lab) 18 m², T: 20–30 °C
SUPPLY Water 2.5 m³/h
Gas (methane) 3.6 m³/h
Pressurized air 6 bar
Direct current 100 V, 10 A
Alternating current 300 kVA
Dedusting 500–1500 m³/h
Travelling crane load capacity 5000 kg
Hoist load capacity 6300 kg
Sedimentation pool 11 m², 2.4 m³
Sample storage 50 m³
Table 1: General technical data of the technical center and the labs
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Apart from the scientific claim, the small scale tests allow a wide variation of parameters from which the most promising test conditions are selected to confine expensive pilot scale tests.
THE PERMANENT EQUIPMENT
The following section shall give a short overview over the main permanently installed test rigs as of September 2015. Additionally, a special area in the main hall is reserved for non-persistent test rig installations combining the permanent apparatus of the Chair with rented or borrowed units from industrial partners.The technical center is equipped for dry comminution test-work with focus on the elaboration of the crushing and grind-ing characteristics of the material. As far as the stress condi-tions impact and compression are dominant, lab scale equipment is sufficient, whereas for compression and friction we had to change to pilot scale to simulate industrial condi-tions on a vertical roller mill. In all cases the scientific evalu-ation is based on the mechanical measurement of the energy input from grinding tools into the material via torque with the most suitable equipment. Special test routines combined with dispersity evaluation at analytical accuracy allow for commi-nution at highest energy efficiency. The energy and dispersity data thus are clearly defined and traceable in order to provide a reproducible base for ore characterization, intergrowth analysis and benchmarking of the efficiency of industrial comminution tools. Screening and classification at pilot scale are done by a tum-bling screen (Allgaier; particle size: –14 +0.063 mm), an air cross flow separator (CEMTEC; top cuts between 150 µm and 20 µm) and cyclone test rigs (40 µm to 2 µm cut-size).The separation equipment at the technical center focuses on density separation as well as magnetic and electrical separa-tion. Flotation at pilot scale recently started by the implemen-tation of a flotation column. There are jigs for sizes below 15 mm available as well as a drum separator for heavy media separation and a HMS cy-clone test rig for feed size range between 8 mm and 0.5 mm in cooperation with VA Erzberg GmbH. Lab scale shaking
tables and (ore) spirals at technical scale close the gap for density separation in the size range between 0.04 mm and 2 mm.Magnetic separators for dry magnetic separation operate from low intensity (size range: –5 +0.04 mm; 0.01–0.08 T), variable intensity (two induction roll separators by Wedag and Carpco; –2 mm +0.1 mm; 0.1–1.8 T) and high intensity (IFE roll separator: 0.8 T; size range –8 mm +0.2 mm; IFE drum separator: 0.35 T; size range –20 mm +0.2 mm). Tests for wet low intensity magnetic separation can be committed with a lab scale Sala drum separator. Recently research work on a lab scale matrix separator in dry and wet mode including prototype development has begun. The electrostatic free fall separator by Hamos with an elec-trode area of 2 m² is located in a special climate chamber for temperature and moisture control.As the trend in mineral processing goes to ever more chal-lenging raw materials (low grade and/or heavily intergrown ores, slags) that cannot be utilized in the fine state they have to be ground to for upgrading, research interest is also put on agglomeration. The lab is equipped with lab scale apparatus for binder research comprising an Eirich high shear mixer (10 l), pelletizing discs and drums (up to 0.62 m diameter), equipment for quality testing of the green pellets (e.g. poros-ity, water saturation) and a load cell for testing the compres-sive strength of green, dry and hardened pellets. A prototype of a down draft mini pellet pot (2 kg of pellets, temperature range from ambient to 1500 °C, electrical and gas power sup-ply) for material testing of pellets at temperature conditions close to industrial rates was developed. Tables 2 to 5 summarize the majority of the standard tests available. Nevertheless there are numerous additional test procedures that can be especially tailored to the needs of the customer to solve specific problems. A discussion with the scientists of the Chair of Mineral Processing helps to reveal the best fitting approach.
Figure 2: View into the physical lab (left); VRM 200 in the technical center (right)
260 Aufbereitung in Österreich i i i
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Sam
ple
Size
Gra
in S
ize
[g]
[mm
]
Det
erm
inat
ion
of b
ulk
dens
itiy
Sta
mp
volu
met
er E
rwek
a S
VM 2
02de
pend
ent o
n m
axim
um s
ize
Allg
aier
scr
een,
1 m
dia
met
er, A
TS 6
00/ 2
up to
50.
000
- 16
+ 0,
060
mm
Scr
een
anal
ysis
test
s si
eve
shak
ers,
- UW
L 40
0 H
aver
Boe
cker
600
x 6
00 m
m s
cree
ns
(-10
0 +
8 m
m)
- Hav
er B
oeck
er E
ML
200
mm
scr
eens
(-6,
3 +
0,04
mm
)te
st s
ieve
sde
pend
ent o
n m
axim
um s
ize
rang
e
Man
ual S
cree
n an
alys
is
dr
y (6
300,
….,2
00, 1
60, 1
00, 7
1, 4
0, )
an
d w
et: (
Rhe
wum
sys
tem
dow
n to
25
µm )
DIN
ISO
331
050
0
air j
et s
cree
n, H
osok
awa
A 20
0dr
y 50
0
Par
ticle
siz
e di
strib
utio
nLa
serg
ranu
lom
etriy
(Mas
ters
izer
200
0, M
alve
rn)
wet
50-0
,200
mm
(- 1
mm
)
Sed
igra
ph II
I (M
icro
mer
itics
512
0)w
et50
- 0,0
60 m
m
Andr
ease
n P
ipet
tew
et10
- 0,0
40 m
m
Sed
imen
tatio
n co
lum
n;
phys
ical
siz
e fra
ctio
ns b
elow
25
µm fo
r che
mic
al a
naly
sis
wet
200
-0,0
40 m
m
Hos
okaw
a, c
entri
fuga
l air
clas
sifie
r, ty
pe 1
00 M
ZRdr
y 10
00+
0,00
5 -
0,10
0 m
m
jaw
cru
sher
; Ret
sch
BB
200
- 4
0 m
m
impa
ct c
rush
er, H
azem
ag 6
286/
60- 4
0 m
m
labo
rato
ry ro
d m
ill (L
:300
mm
; D. 1
50 m
m);
rod
char
ge: 7
,5 k
g; 1
:2 B
ond
mill;
ba
tch
test
s50
0 - 8
00
brea
kage
beh
avio
ur fo
r int
ergr
owth
cha
ract
eriz
atio
nla
bora
tory
bal
l mill,
torq
ue ro
d fo
r ene
rgy
mea
sure
men
t; 20
0 m
m x
200
mm
, bal
l ch
arge
8,5
kg
800
- 100
0 fe
ed 1
00%
- 3,
15
min
imum
pro
duct
: 10
0% -
45 µ
m
OC
S m
etho
d (d
evel
opm
ent o
f the
Inst
itute
of M
iner
al P
roce
ssin
g; P
rof.
H.J
. St
eine
r)
stag
e w
ise
ener
gy " O
ptim
ized
Com
min
utio
n Se
quen
ce",
(min
imum
ene
rgy
expe
nditu
re to
obt
ain
a co
mm
inut
ion
prod
uct o
f a d
efin
ed m
axim
um s
ize)
; re
prod
ucab
le, o
nly
mat
eria
l dep
ende
nt p
artic
le s
ize
dist
ribut
ions
us
ually
50
000
g; (-
40
mm
)
resu
lts: n
atur
al b
reak
age
char
acte
ristic
( m
ater
ial d
epen
dent
"ste
epes
t" si
ze
dist
ribut
ion)
, cal
cula
ted
wor
k in
dex,
Ene
rgy
vs. S
peci
fic s
urfa
ce d
evel
opm
ent
(Ritt
inge
r grin
dabi
lity
Inde
x), p
artic
le s
hape
fact
or,
min
imum
siz
e of
com
min
utio
n
thre
e st
ages
con
sist
ing
of 1
) jaw
cr
ushe
r, 2
)rod
mill,
3) b
all m
ill
He-
pycn
omet
er (A
kkuP
yk 1
330)
50up
to 1
0 m
m
pycn
omet
er, b
uoya
ncy
met
hods
up to
100
mm
dens
ity d
istri
butio
n (s
ink
float
ana
lysi
s)(li
quid
s: 1
g/c
m³ u
p to
4,5
g/c
m³)
depe
ndin
g on
siz
e- 1
5 m
m
Dav
is T
ube
, Wed
a TR
M10
0- 1
mm
Pic
k up
met
hod
(dry
sus
cept
ibilit
y di
strib
utio
n te
st: m
artit
ic o
res,
Böh
m 2
000)
100
- 1 +
0,1
mm
Fran
tz Is
odyn
amic
Sep
arat
or. F
rant
z L-
1 (in
siz
e cl
asse
s be
twee
n - 1
mm
+ 0
,04
mm
)20
per
siz
e cl
ass
- 0,7
1 +
0,04
mm
Sat
mag
an (o
utuk
umpu
) Mod
el 1
32, p
hysi
cal d
eter
min
atio
n of
mag
netit
e co
nten
t, 20
- 2 m
m
Bla
ine
appa
ratu
s20
- 0,2
mm
Per
mer
an O
utok
umpu
20- 2
mm
Sur
face
by
gas
adso
rptio
n B
ET
(por
osity
con
trol),
Flo
wso
rb 2
300
mic
rom
eriti
cs, s
ingl
e po
int)
20- 1
mm
Che
mis
try in
siz
e cl
asse
sXR
F (2
0 el
emen
ts),
Inst
itute
of A
naly
tical
Che
msi
try, M
onta
nuni
vers
itaet
20
Wet
ass
ay fo
r Fe2
+, F
e3+
(for a
cid
solu
ble
ores
, with
out p
ress
ure
dige
stio
n)
prep
arat
ion
of p
olis
hed
sect
ions
Mic
rosc
opy
of p
olis
hed
sect
ions
Ref
lect
ed li
ght m
icro
scop
y (R
eich
ert P
olyv
ar®
)
SE
M E
DX
Mon
tanu
nive
rsita
et L
eobe
n
X-R
ay D
iffra
ctio
nXR
D, M
onta
nuni
vers
itaet
Leo
ben
qem
scan
, dat
a ev
alua
tion
idis
cove
r 3.1
coop
erat
ion
with
LK
AB, U
se o
f Qem
scan
equ
ipm
ent i
n M
alm
berg
et
Test
Mat
eria
l and
Ore
C
hara
cter
izat
ion
Det
erm
inat
ion
of th
e K
ozen
y su
rface
Det
erm
inat
ion
of th
e su
scep
tibilit
y an
d su
scep
tibilit
y di
strib
utio
n /
prep
arat
ion
of m
iner
alog
ical
inve
stig
atio
n
Mat
eria
l den
sity
Physical Ore Characterization (material as received)
Met
hod
Mineralogy
Tabl
e 2:
Sta
ndar
d te
st pr
oced
ures
I: O
re c
hara
cter
izatio
n
Aufbereitung in Österreich i i i 261
Aufbereitung in Österreich i i i – DekADenbericht 2005 bis 2015 n
Tabl
e 3:
Sta
ndar
d te
st pr
oced
ures
II: G
rindi
ng a
nd a
gglo
mer
atio
n te
sts
Sam
ple
Size
Gra
in S
ize
[g]
[mm
]gr
indi
ng v
alue
s fo
r mat
eria
l´s c
hara
cter
izat
ion,
con
firm
atio
n an
d co
mpa
rison
(no
guar
ante
es)
tum
blin
g m
ills:
Bon
d re
late
d te
sts,
cal
cula
ted
wor
k in
dex
rod
mill
(100
% <
6,3
to 1
00%
< 1
mm
; 0,2
mm
; cal
cula
ted
wor
k in
dex)
0,3
x 0,
15 m
5000
g/ 8
cyc
les
diffe
renc
e to
Bon
d: s
mal
ler m
ills; m
easu
rem
ent o
f ene
rgy
by to
rque
rods
Labo
rato
ry b
all m
ill (e
nerg
y m
esur
emen
t by
torq
ue ro
d), s
urfa
ce d
evel
opm
ent*
)0,
2 x
0,2
m80
00 g
/ 8 c
ycle
s
Labo
rato
ry b
all m
ill es
peci
ally
use
d to
find
pel
letiz
ing
finen
ess
rolle
r mill
s:VR
M 2
00,
see
belo
w, t
orqu
e ro
d in
the
driv
e sy
stem
20.0
00 -
200.
000
g
Zeis
el te
ster
300
g/ 1
0 cy
cles
-1 +
0,7
mm
feed
rolle
r mill,
dis
c di
amet
er 2
00 m
m, a
vera
ge ro
ller d
iam
eter
140
mm
, 2 ro
lls, i
netrn
al
air c
lass
ifier
160
mm
dia
met
er, (
300
- 400
0 rp
m);
addi
tiona
l opt
ion:
byp
ass
of
clas
sifie
r co
arse
mat
eria
l20
000
- 20
0 00
0 g/
h- 0
,02
; - 0
,2 m
m
depe
ndin
g on
set
tings
of
cla
ssifi
wer
clas
sic
BO
ND
test
s, ro
d an
d ba
ll m
ill in
coo
pera
tion
with
CE
MTE
CW
ork
inde
x fo
r mill
desi
gn: o
nly
usef
ul in
coo
pera
tion
with
a m
ill su
pplie
r; va
lid fo
r m
ill de
sign
, app
arat
us a
nd p
roce
ss g
uara
ntee
onl
y by
equ
ipm
ent s
uppl
ier
Pel
letiz
ing
test
s
Ela
bora
tion
of o
ptim
um s
ize
dist
ribut
ion
and
wat
er c
onsu
mpt
ion
Varia
tion
of b
inde
r dos
age
and
addi
tives
-0,2
mm
Impl
emen
tatio
n of
was
te m
ater
ial
Siz
e di
strib
utio
n of
Pel
lets
Moi
stur
e co
nten
t in
size
cla
sses
Dro
p te
st in
siz
e cl
asse
s
Com
pres
sive
stre
ngth
: gre
en a
nd d
ry in
siz
e cl
asse
sLo
ad c
ell
Por
osity
in s
ize
clas
ses
Geo
Pyk
136
0 (M
icro
mer
iitcs
®)
Wat
er s
atur
atio
n
Net
zsch
dila
tom
eter
furn
ace(
" sin
gle
parti
cle
indu
ratio
n")
min
i pel
let p
ot; 2
kg
pelle
ts, t
empe
ratu
re p
rofil
e ac
cord
ing
to in
dust
rial p
lant
s,
test
ing
of b
inde
rs a
nd a
dditi
ves
at v
aryi
ng te
mpe
ratu
res,
pre
para
tion
of re
gula
r pot
te
sts
Load
cel
l, fo
rce
and
spee
d co
ntro
lled;
max
imum
looa
d 50
00 N
, mes
sphy
sik
*) c
alcu
late
d m
eans
: der
ivat
ion
of B
ond´
s in
dex
from
mea
sure
d en
ergy
val
ues
and
size
val
ues.
In B
ond´
s m
etho
ds e
nerg
y is
not
mea
sure
d bu
t dep
ends
on
the
stric
t ap
para
tus
setu
p. O
ur m
ills a
re n
ot s
trict
Bon
d m
ills
Indu
ratio
nTe
sts
Ener
gy c
ontr
olle
d gr
indi
ng te
sts
(dry
),
Com
pres
sive
stre
ngth
of i
ndur
ated
pel
lets
Test
Gre
en P
elle
tizin
gTe
sts
grin
dabi
lity,
Grin
ding
B
ehav
ior
Pelletizing Tests
Quality Evaluation
Met
hod
2.00
0 to
50.
000
0.63
m d
iam
eter
pel
letiz
ing
disc
or d
rum
; adj
suta
ble
spee
d
Ene
rgy
valu
es fo
r mill
desi
gn: i
n co
oper
atio
n w
ith s
uppl
iers
rolle
r mill
VR
M 2
00 C
EMTE
C w
ith e
nerg
y m
easu
rem
ent b
y to
rque
rod,
and
3 m
odes
of
ope
ratio
n: K
olle
r Gan
g, c
lass
ic ro
ller m
ill w
ith in
tern
al a
ir cl
asss
ifier
and
byp
ass
of
coar
se m
ater
ial o
f the
cla
ssifi
er
Indu
ratio
n of
dry
pel
lets
acc
ordi
ng to
a te
mpe
ratu
re p
rofil
e
Ela
bora
tion
of th
e su
rface
dev
elop
men
t vs.
Cum
ulat
ive
ener
gy s
uppl
ied
262 Aufbereitung in Österreich i i i
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Sam
ple
Size
Gra
in S
ize
[g]
[mm
]
Sw
ellin
g in
dex
(I.B
.O F
P-0
3/20
03)
wat
er a
dsor
ptio
n, E
nslin
Nef
f - te
st (I
.B.O
. FP
-02/
2003
)
Met
hyle
ne b
lue
test
(VD
G P
35, I
.B.O
. 02/
2003
, I.B
.O. 0
3/20
03)
OC
MA
Test
, vis
cosi
tyA
PI S
Pec
13A
/Iso
1350
0)
moi
stur
e co
nten
t
Haa
ke R
heos
tress
600
Rhe
owin
VT
550
capi
llary
vis
osim
eter
for s
uspe
nsio
ns
perm
anen
t ava
ilabl
e S
EPA
RA
TIO
N e
quip
men
t
labo
rato
ry d
rum
test
s up
to 5
0 l
20.0
00 g
- 30
mm
heav
y m
ediu
m c
yclo
n te
strig
, cy
clon
e: D
6B-1
2 -8
39, 1
90 m
m d
iam
eter
, 18
- 30
m³/h
vol
ume
stre
am, s
tirre
d su
mp
50.0
00 g
+ 0,
3 - 1
5 m
m
jig, S
iebt
echn
ik- 1
6 m
m
lab
shak
ing
tabl
es1)
. 1 K
rupp
: K 1
794
250
x 50
0 m
m; 2
).1 7
50 x
100
0 m
m 1
0.00
0 g
- 1 m
m +
0,04
mm
spira
ls1
Kre
bs o
re s
pira
l, m
ediu
m, 1
org
inal
Hum
phre
ys s
pira
l- 2
mm
+0,
2 m
m
lab
drum
sep
arat
or, a
djus
tabl
e fie
ld v
ia c
oil c
urre
nt 0
,005
- 0,
06 T
dry
som
e 10
.000
- 5 m
m
lab
drum
sep
arat
or, S
ALA
TU 1
488/
0 20
0 m
m d
rum
dia
met
erw
etso
me
10.0
00- 1
mm
indu
ctio
n ro
ll se
para
tor s
; Car
pco
MIH
(13)
111
-5; 0
,1 -
1 T
dry
som
e 10
.000
- 2 m
m +
0,1
mm
indu
ctio
n ro
ll se
para
tors
Wed
AG i-
1-15
0, 0
,1 -
1,4
Tdr
yso
me
10.0
00- 2
mm
+ 0
,1 m
m
dry
som
e 10
.000
- 8 m
m +
0,1
mm
dry
- 20
mm
+ 0
,1 m
m
wet
depe
nds
on m
atrix
type
lab
scal
e ro
ll se
para
tor,
Car
pco
HP
-167
-MC
arpc
odr
y- 2
0 kV
Ham
osdr
y- 1
00 k
V
Den
ver D
-1 la
b ce
ll, re
agen
t tes
ting
elab
orat
ion
of re
agen
t sys
tem
in 1
- 3 l
cells
lab
colu
mn
cell:
D =
80
mm
; L =
2,5
m
Zeta
pot
entia
l m
easu
rem
ent
stre
amin
g po
tent
ial;
EK
A An
ton
Paa
r ; e
lect
roph
ores
is
bent
onite
ch
arac
teriz
atio
n
Test
Met
hod
perm
anen
t mag
netic
roll
sepa
rato
r, ro
ll di
amet
er: 0
,08
m; w
idth
: 0,2
5 m
IFE
KP
250
-1, 0
,7 T
perm
anen
t mag
netic
dru
m s
para
tor;
0,6
x 0,
6 m
, 0,3
5 T
mat
rix s
epar
ator
rese
arch
dry
mag
netic
mat
rix s
epar
ator
EM
S 5
00, f
ree
fall
sepa
rato
r, cl
imat
e ch
ambe
r
elec
tros
tatic
se
para
tion
visc
osity
flota
tion
+1m
m
HIM
S
Mag
netic
sep
arat
ion
LIM
S
-1 m
m
dens
ity s
epar
atio
n
Tabl
e 4:
Sta
ndar
d te
sts II
I: B
ento
nite
testi
ng a
nd se
para
tion
tests
Aufbereitung in Österreich i i i 263
Aufbereitung in Österreich i i i – DekADenbericht 2005 bis 2015 n
Tabl
e 5:
Add
ition
al e
quip
men
t
Sam
ple
Size
Gra
in S
ize
[g]
[mm
]
dryi
ngm
ini p
elle
t pot
test
rig
for d
own
draf
t dry
ing
mix
ing
high
inte
nsity
mix
er, E
irich
R 0
2 E
, 5 l
< 10
.000
- 5
mm
tube
furn
ace
used
for h
eate
d pe
rmea
ted
parti
cle
bed
test
s w
ith o
ff ga
s co
mpo
sitio
n m
easu
rem
ent
muf
fle fu
rnca
e, N
aber
ther
m L
/15/
12
mea
sure
men
t sys
tem
sel
ectri
cal p
ower
; off
gas
com
posi
tion
Test
o 35
0 M
(SO
2, O
2, C
O, C
O2,
NO
x),
clim
ate
cham
bers
Test
Met
hod
2 cl
imat
e ch
ambe
rs/ r
oom
s: 1
. P
A-O
CA
71a-
H/R
407
150
m³;
moi
stur
e: 1
0 - 6
0 %
, Tem
pera
ture
: 5 -
60 °
C;2
. 32
m³,
defin
ed m
oist
ure
for e
.g. p
elle
tizin
g te
sts
addi
tiona
l fur
nace
s
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