560 XXXI International Mineral Processing Congress 2024 Proceedings/Washington, DC/Sep 29–Oct 3
from magnetite particles, deteriorating the cDMS selectiv-
ity. In addition, for the extremely fine feed particles, most
of gangues become entrained in the concentrate due to
the interaction force among fine particles, and this further
affects the cDMS performance. These outcomes from this
investigation indicate that the cDMS separator has a rela-
tively lower performance for the separation of –0.037 mm
finest feed, but it is still very considerable as a DMS process.
cDMS Performance for Different Separation Cone
Speeds
The separation cone speed determines the effect of centrifu-
gal force acting onto powdered particles in the cDMS pro-
cess, thus the effect of separation cone speed on the cDMS
performance was particularly investigated, with results
shown in Fig.4. It is noted that the feed particle size below
0.10 mm was used for this investigation.
It can be seen from Figure 4, the separation cone
speed significantly affects the separation performance of
the cDMS separator. With increase in the separation cone
speed from 50 rpm to 80 rpm, the mass of concentrate was
obviously decreased from 70.07% to 63.53% meanwhile,
the magnetite iron recovery of concentrate was decreased
from 98.89% to 96.08%. This is due to the fact that the
increased separation cone speed significantly increases the
centrifugal force acting onto magnetite particles, so that
some intergrown particles can not overcome the effect of
centrifugal force and enter into the tailings.
When the separation cone speed was increased from 50
rpm to 70 rpm, the magnetite iron grade in magnetite was
increased from 40.32% to 43.07% beyond this range, the
55
60
65
70
75
80
85
90
95
100
-0.037 -0.074 -0.10 -0.425
Concentrate, mass yield
Concentrate, total Fe recovery
Concentrate, total Fe grade
Tailings, total Fe grade
Feed particle size (mm)
-2.0
5
10
15
20
25of
30
35
40
45
50
Figure 2. cDMS-1000 separation performance for total iron
55
60
65
70
75
80
85
90
95
100
-0.038 -0.074 -0.10 -0.425 -2.0
Concentrate, mass yield
Concentrate, magnetite Fe recovery
Concentrate, magnetite Fe grade
Tailings, magnetite Fe grade
Feed particle size (mm)
0
5
10
15
20
25of
30
35
40
45
50
Figure 3. cDMS-1000 separation performance for magnetite iron
Mass
yield
and
recovery
(%)
Grades
products
(%)
Mass
yield
and
recovery
(%)
Grades
products
(%)
from magnetite particles, deteriorating the cDMS selectiv-
ity. In addition, for the extremely fine feed particles, most
of gangues become entrained in the concentrate due to
the interaction force among fine particles, and this further
affects the cDMS performance. These outcomes from this
investigation indicate that the cDMS separator has a rela-
tively lower performance for the separation of –0.037 mm
finest feed, but it is still very considerable as a DMS process.
cDMS Performance for Different Separation Cone
Speeds
The separation cone speed determines the effect of centrifu-
gal force acting onto powdered particles in the cDMS pro-
cess, thus the effect of separation cone speed on the cDMS
performance was particularly investigated, with results
shown in Fig.4. It is noted that the feed particle size below
0.10 mm was used for this investigation.
It can be seen from Figure 4, the separation cone
speed significantly affects the separation performance of
the cDMS separator. With increase in the separation cone
speed from 50 rpm to 80 rpm, the mass of concentrate was
obviously decreased from 70.07% to 63.53% meanwhile,
the magnetite iron recovery of concentrate was decreased
from 98.89% to 96.08%. This is due to the fact that the
increased separation cone speed significantly increases the
centrifugal force acting onto magnetite particles, so that
some intergrown particles can not overcome the effect of
centrifugal force and enter into the tailings.
When the separation cone speed was increased from 50
rpm to 70 rpm, the magnetite iron grade in magnetite was
increased from 40.32% to 43.07% beyond this range, the
55
60
65
70
75
80
85
90
95
100
-0.037 -0.074 -0.10 -0.425
Concentrate, mass yield
Concentrate, total Fe recovery
Concentrate, total Fe grade
Tailings, total Fe grade
Feed particle size (mm)
-2.0
5
10
15
20
25of
30
35
40
45
50
Figure 2. cDMS-1000 separation performance for total iron
55
60
65
70
75
80
85
90
95
100
-0.038 -0.074 -0.10 -0.425 -2.0
Concentrate, mass yield
Concentrate, magnetite Fe recovery
Concentrate, magnetite Fe grade
Tailings, magnetite Fe grade
Feed particle size (mm)
0
5
10
15
20
25of
30
35
40
45
50
Figure 3. cDMS-1000 separation performance for magnetite iron
Mass
yield
and
recovery
(%)
Grades
products
(%)
Mass
yield
and
recovery
(%)
Grades
products
(%)