XXXI International Mineral Processing Congress 2024 Proceedings/Washington, DC/Sep 29–Oct 3 2989
mechanical cell flotation. As it was mentioned previously,
the pulp density is one of the key parameters affecting the
flotation performance. To better understand this impact
in Concorde Cell, a series of experiments were conducted
using metallurgical coal and graphite. Figure 7 presents the
kinetics and grade-recovery graphs for two different pulp
solids. At a single glance, it can be deduced that diluting
the pulp solids from 20% to 5% resulted in faster kinetic
and improved carbon grades. Not only the grades but also
the recoveries have significantly increased at 5% solid. In
conclusion, going so high in pulp density had an adverse
effect on graphite cleaner flotation.
Figure 8 shows the effect of pulp solid on metallurgical
coal samples. The chosen pulp solids are 3.2% and 8.5%
for T8 and T10, respectively. Similarly to the graphite
sample, dilution of coal by 5.3% resulted in faster kinetics
and less ash content along with higher combustible recov-
ery. The lowest ash content of 5.2% was achieved at 3.2%
pulp solids, while the lowest ash content was 7.6% at 8.5%
0
10
20
30
40
50
60
70
80
90
100
0 10 20 30 40 50
Blast Tube residence time, s.
T3, 5% solids, BT (2)
T4, 20% solids, BT (2)
74
76
78
80
82
84
86
0 10 20 30 40 50 60 70 80 90 100
Carbon Recovery, %
Figure 7. The effect of pulp solids- graphite, (BT- Blast Tube)
0
10
20
30
40
50
60
70
80
90
100
0 5 10 15 20 25 30
Blast Tube residence time, s
T8, 3.2% solids, BT (1)
T10, 8.5% solids, BT (1)
0
10
20
30
40
50
60
70
80
90
100
0 5 10 15 20 25
Cumulative Ash%
Figure 8. The effect of pulp solids -metallurgical coal, (BT- Blast Tube)
Carbon
Recovery
%
Carbon
Grade,
%
%,yrevoceRelbitsubmoC
Cumulative
Combustible
Recovery
%