XXXI International Mineral Processing Congress 2024 Proceedings/Washington, DC/Sep 29–Oct 3 3067
selectivity for sulphur is confirmed, as shown in Figure 8,
justifying its potential application in the industrial area.
Therefore, the increased selectivity for sulphides, particu-
larly advantageous in the cleaning stage, contributes to the
reduction of mass in the final concentrate (Table 2).
Au and Te Correlation
The comparison between gold analyses conducted by
Boliden’s internal chemical laboratory and the plant’s
on-stream XRF analyzer indicates a strong correlation.
Additionally, tellurium analyses from the chemical labora-
tory for both plant feed and concentrate samples (Figure 9
and Figure 10) exhibit a robust correlation. This suggests
that tellurium analyses and the results from the plant’s
on-stream X-ray analyzer can be utilized to predict the
expected behaviour of gold in more accurate chemical
analyses for metal accounting. Moreover, the tellurium and
gold grades in the samples show a good correlation with
the silver and bismuth content in the samples. Therefore,
0
5,000
10,000
15,000
20,000
25,000
20 40 60 80 100
Te recovery (%)
Test 1 -PAX
Test 1 -Aerophine
Test 2 -PAX
Test 2 -Aerophine
Figure 5. Comparative study using different samples on
tellurium recovery between PAX and Aerophine and the
tellurium content in the concentrate at pH 10
0
20
40
60
80
100
20 40 60 80 100
Te recovery (%)
Test 1 -PAX
Test 1 -Aerophine
Test 2 -PAX
Test 2 -Aerophine
Figure 6. Comparative study using different samples on
tellurium recovery between PAX and Aerophine and sulphur
recovery at pH 10
0
2,000
4,000
6,000
8,000
10,000
12,000
14,000
16,000
0 50 100
Te recovery (%)
Test 3 -PAX
Test 3 -Aerophine
Figure 7. Comparative study using different samples on
tellurium recovery between PAX and Aerophine and the
tellurium content in the concentrate at pH 7
0
20
40
60
80
100
0 20 40 60 80 100
Te recovery (%)
Test 3 -PAX
Test 3 -Aerophine
Figure 8. Comparative study using different samples on
tellurium recovery between PAX and Aerophine and sulphur
recovery at pH 7
Table 2. Mass Pull for Tests 1 to 3 of Rougher Concentrate
and Cleaner Final Concentrate
Rougher
Concentrate (%)
Cleaner Final
Concentrate (%)
Test 1 -PAX 2.60 1.01
Test 1 -Aerophine 2.93 0.40
Test 2 -PAX 2.70 1.34
Test 2 -Aerophine 2.02 0.38
Test 3 -PAX 7.25 1.05
Test 3 -Aerophine 6.59 0.15
Te
grade
in
the
c
centrate
(ppm)
S
recovery
(%)
Te
grade
in
the
concentrate
(ppm)
S
recovery
(%)
selectivity for sulphur is confirmed, as shown in Figure 8,
justifying its potential application in the industrial area.
Therefore, the increased selectivity for sulphides, particu-
larly advantageous in the cleaning stage, contributes to the
reduction of mass in the final concentrate (Table 2).
Au and Te Correlation
The comparison between gold analyses conducted by
Boliden’s internal chemical laboratory and the plant’s
on-stream XRF analyzer indicates a strong correlation.
Additionally, tellurium analyses from the chemical labora-
tory for both plant feed and concentrate samples (Figure 9
and Figure 10) exhibit a robust correlation. This suggests
that tellurium analyses and the results from the plant’s
on-stream X-ray analyzer can be utilized to predict the
expected behaviour of gold in more accurate chemical
analyses for metal accounting. Moreover, the tellurium and
gold grades in the samples show a good correlation with
the silver and bismuth content in the samples. Therefore,
0
5,000
10,000
15,000
20,000
25,000
20 40 60 80 100
Te recovery (%)
Test 1 -PAX
Test 1 -Aerophine
Test 2 -PAX
Test 2 -Aerophine
Figure 5. Comparative study using different samples on
tellurium recovery between PAX and Aerophine and the
tellurium content in the concentrate at pH 10
0
20
40
60
80
100
20 40 60 80 100
Te recovery (%)
Test 1 -PAX
Test 1 -Aerophine
Test 2 -PAX
Test 2 -Aerophine
Figure 6. Comparative study using different samples on
tellurium recovery between PAX and Aerophine and sulphur
recovery at pH 10
0
2,000
4,000
6,000
8,000
10,000
12,000
14,000
16,000
0 50 100
Te recovery (%)
Test 3 -PAX
Test 3 -Aerophine
Figure 7. Comparative study using different samples on
tellurium recovery between PAX and Aerophine and the
tellurium content in the concentrate at pH 7
0
20
40
60
80
100
0 20 40 60 80 100
Te recovery (%)
Test 3 -PAX
Test 3 -Aerophine
Figure 8. Comparative study using different samples on
tellurium recovery between PAX and Aerophine and sulphur
recovery at pH 7
Table 2. Mass Pull for Tests 1 to 3 of Rougher Concentrate
and Cleaner Final Concentrate
Rougher
Concentrate (%)
Cleaner Final
Concentrate (%)
Test 1 -PAX 2.60 1.01
Test 1 -Aerophine 2.93 0.40
Test 2 -PAX 2.70 1.34
Test 2 -Aerophine 2.02 0.38
Test 3 -PAX 7.25 1.05
Test 3 -Aerophine 6.59 0.15
Te
grade
in
the
c
centrate
(ppm)
S
recovery
(%)
Te
grade
in
the
concentrate
(ppm)
S
recovery
(%)