XXXI International Mineral Processing Congress 2024 Proceedings/Washington, DC/Sep 29–Oct 3 1059
Chemical Composition of the Studied Sample
In the massive sulfide 2% Cu sample, the copper grade of
the calculated bulk sample is 2.16%. In the massive sulfide
1–2% Cu sample, the copper grade is 2.19%, and in the
stockwork1% Cu sample, the copper grade in the calcu-
lated bulk sample is 1.7%. The iron grade of samples var-
ies from 16.5% to 39.9%, and the main gangue mineral,
quartz, varies from 10% to 47.8%. massive sulfide2% and
massive sulfide 1–2% chemical compositions are similar.
The chemical composition of the samples can be seen in
Table 2.
Mineral Composition of the Studied Sample
The primary copper carrier in the sample is chalcopyrite.
the copper phase analysis reveals a trace amount of copper
oxides and secondary copper minerals. The MS 2% Cu
sample consists of 5.70wt% of chalcopyrite and 78.4wt%
of pyrite. The main gangue mineral is quartz, constituting
8.8wt% of the sample. The MS 1–2% Cu sample consists
of 5.8wt% of chalcopyrite and 79.0wt% of pyrite. Quartz
constitutes 11.4wt% of the sample. The stockwork1% Cu
sample contains 5.7wt% of chalcopyrite and 28.0wt% of
pyrite. The main silicate is quartz, constituting 35.4wt%
of the sample.
In both massive sulfide samples, the liberation of chal-
copyrite is poor because chalcopyrite tends to appear in
veinlets or minute inclusions in the pyrite. In the stockwork
sample, the liberation of chalcopyrite is better. In the MS
2% Cu sample, chalcopyrite is liberated in 76.1% bulk.
In the MS 1–2% Cu sample, the chalcopyrite liberation
grade is 69.7%. In the stockwork sample, the bulk libera-
tion degree of chalcopyrite equals 90.7%. The liberation
degree of pyrite is above 95% in all the samples. The min-
eral composition of the samples can be seen in Table 3.
METHOD
In the Mawarid experimental scope, grinding, bench scale
flotation experiments, and simulation study were con-
ducted to determine the flotation performances of various
interests also validate the simulation results of the devel-
oped flowsheet by locked cycle test.
Grinding Procedure
Grinding experiments were conducted to maintain desired
particle size distribution for flotation tests. A standard mild
steel laboratory-type ball mill was used for the 1.5 kg blend
sample batch. Based on the client’s previous studies, the
primary grinding target P80 was 60 microns. Ball mill and
primary grind ball batch properties are shown in Table 4.
Blend ore samples weighting of 1.5 kg was ground with
a 65% solids concentration using mill speed of 68 rounds
per minute. Particle size distribution was measured by wet
sieving with ultrasound.
Flotation procedure
The flotation tests were carried out using an Outotec GTK
LabCell ™ flotation machine, shown in Figure 4. The flota-
tion machine has square cells, a rotor-stator mechanism,
and an automatic scraping device. Airflow and impeller
0
10
20
30
40
50
60
70
80
90
100
0001 001 01
Particle size, μm
Stockwork MS 1-2% MS 2%
Figure 3. Particle size distribution of crushed feed
Passing,
%
Chemical Composition of the Studied Sample
In the massive sulfide 2% Cu sample, the copper grade of
the calculated bulk sample is 2.16%. In the massive sulfide
1–2% Cu sample, the copper grade is 2.19%, and in the
stockwork1% Cu sample, the copper grade in the calcu-
lated bulk sample is 1.7%. The iron grade of samples var-
ies from 16.5% to 39.9%, and the main gangue mineral,
quartz, varies from 10% to 47.8%. massive sulfide2% and
massive sulfide 1–2% chemical compositions are similar.
The chemical composition of the samples can be seen in
Table 2.
Mineral Composition of the Studied Sample
The primary copper carrier in the sample is chalcopyrite.
the copper phase analysis reveals a trace amount of copper
oxides and secondary copper minerals. The MS 2% Cu
sample consists of 5.70wt% of chalcopyrite and 78.4wt%
of pyrite. The main gangue mineral is quartz, constituting
8.8wt% of the sample. The MS 1–2% Cu sample consists
of 5.8wt% of chalcopyrite and 79.0wt% of pyrite. Quartz
constitutes 11.4wt% of the sample. The stockwork1% Cu
sample contains 5.7wt% of chalcopyrite and 28.0wt% of
pyrite. The main silicate is quartz, constituting 35.4wt%
of the sample.
In both massive sulfide samples, the liberation of chal-
copyrite is poor because chalcopyrite tends to appear in
veinlets or minute inclusions in the pyrite. In the stockwork
sample, the liberation of chalcopyrite is better. In the MS
2% Cu sample, chalcopyrite is liberated in 76.1% bulk.
In the MS 1–2% Cu sample, the chalcopyrite liberation
grade is 69.7%. In the stockwork sample, the bulk libera-
tion degree of chalcopyrite equals 90.7%. The liberation
degree of pyrite is above 95% in all the samples. The min-
eral composition of the samples can be seen in Table 3.
METHOD
In the Mawarid experimental scope, grinding, bench scale
flotation experiments, and simulation study were con-
ducted to determine the flotation performances of various
interests also validate the simulation results of the devel-
oped flowsheet by locked cycle test.
Grinding Procedure
Grinding experiments were conducted to maintain desired
particle size distribution for flotation tests. A standard mild
steel laboratory-type ball mill was used for the 1.5 kg blend
sample batch. Based on the client’s previous studies, the
primary grinding target P80 was 60 microns. Ball mill and
primary grind ball batch properties are shown in Table 4.
Blend ore samples weighting of 1.5 kg was ground with
a 65% solids concentration using mill speed of 68 rounds
per minute. Particle size distribution was measured by wet
sieving with ultrasound.
Flotation procedure
The flotation tests were carried out using an Outotec GTK
LabCell ™ flotation machine, shown in Figure 4. The flota-
tion machine has square cells, a rotor-stator mechanism,
and an automatic scraping device. Airflow and impeller
0
10
20
30
40
50
60
70
80
90
100
0001 001 01
Particle size, μm
Stockwork MS 1-2% MS 2%
Figure 3. Particle size distribution of crushed feed
Passing,
%