1970 XXXI International Mineral Processing Congress 2024 Proceedings/Washington, DC/Sep 29–Oct 3
that under appropriate flotation conditions, the P₂O₅
grade and P₂O₅ recovery of rougher phosphorus concen-
trate obtained by the combined process were comparable to
those obtained by the single flotation process. At the same
time, because the flotation feed amount of the combined
process is reduced by 50–60%, the cost of flotation reagents
can be greatly reduced.
Copper Recovery
The iron dressing tailings contain 0.047% copper, and the
comprehensive recovery of copper sulfide minerals was
explored using the process of “copper-sulfur bulk flotation
and copper-sulfur separation”. As mentioned earlier, the
primary copper recovery process does not involve grinding
treatment. High efficiency copper collectors are used in the
bulk flotation operation to enhance the collection of cop-
per sulfur minerals. Subsequently, the rougher concentrate
is finely ground before undergoing copper sulfur separa-
tion. This approach ensures overall process efficiency and
maintains the grade of the copper concentrate.
A locked circuit test was conducted for the compre-
hensive recovery of sulfide minerals using the high effi-
ciency collector JC and following the flowchart outlined
in Figure 9. The results of locked-circuit test are shown in
Table 7. The results demonstrate that copper concentrate
with a Cu grade of 16.32% and sulfur concentrate with
an S grade of 33.25% can be obtained, thereby achieving
copper recovery.
Industrial Tests
Building upon prior research, the mine underwent a
transformation in process technology to develop the iron-
phosphorus-copper synchronous recovery technology, as
illustrated in Figure 10. Subsequently, industrial tests were
conducted, and the results are detailed in Table 8.
The test results demonstrate that the industrial test
yields an iron concentrate with a TFe grade of 65.23%
and an TFe recovery of 46.82%. The resulting phosphate
concentrate boasts a P2O5 grade of 33.10% and a recovery
of 63.04%. Additionally, the copper concentrate exhibits
a Cu grade of 16.12% with a recovery of 41.46%. These
outcomes indicate successful simultaneous recovery of iron,
phosphorus, and copper, showcasing favorable technical
and economic performance.
CONCLUSIONS
The ultra-low grade magnetite ore contains valuable compo-
nents such as iron, phosphorus, and copper, but the content
0.3 0.4 0.5 0.6
10
20
30
40
50
60
70
Loss of P2O5
Discarding rate
Magnetic field intensity, T
Figure 6. The relationship between discarding rate and P
2 O
5 loss rate of the magnetic tailings
Figure 7. Process mineralogical examination of products obtained from wet pre concentration tests
Discarding
rate/
P2O5
loss
%
that under appropriate flotation conditions, the P₂O₅
grade and P₂O₅ recovery of rougher phosphorus concen-
trate obtained by the combined process were comparable to
those obtained by the single flotation process. At the same
time, because the flotation feed amount of the combined
process is reduced by 50–60%, the cost of flotation reagents
can be greatly reduced.
Copper Recovery
The iron dressing tailings contain 0.047% copper, and the
comprehensive recovery of copper sulfide minerals was
explored using the process of “copper-sulfur bulk flotation
and copper-sulfur separation”. As mentioned earlier, the
primary copper recovery process does not involve grinding
treatment. High efficiency copper collectors are used in the
bulk flotation operation to enhance the collection of cop-
per sulfur minerals. Subsequently, the rougher concentrate
is finely ground before undergoing copper sulfur separa-
tion. This approach ensures overall process efficiency and
maintains the grade of the copper concentrate.
A locked circuit test was conducted for the compre-
hensive recovery of sulfide minerals using the high effi-
ciency collector JC and following the flowchart outlined
in Figure 9. The results of locked-circuit test are shown in
Table 7. The results demonstrate that copper concentrate
with a Cu grade of 16.32% and sulfur concentrate with
an S grade of 33.25% can be obtained, thereby achieving
copper recovery.
Industrial Tests
Building upon prior research, the mine underwent a
transformation in process technology to develop the iron-
phosphorus-copper synchronous recovery technology, as
illustrated in Figure 10. Subsequently, industrial tests were
conducted, and the results are detailed in Table 8.
The test results demonstrate that the industrial test
yields an iron concentrate with a TFe grade of 65.23%
and an TFe recovery of 46.82%. The resulting phosphate
concentrate boasts a P2O5 grade of 33.10% and a recovery
of 63.04%. Additionally, the copper concentrate exhibits
a Cu grade of 16.12% with a recovery of 41.46%. These
outcomes indicate successful simultaneous recovery of iron,
phosphorus, and copper, showcasing favorable technical
and economic performance.
CONCLUSIONS
The ultra-low grade magnetite ore contains valuable compo-
nents such as iron, phosphorus, and copper, but the content
0.3 0.4 0.5 0.6
10
20
30
40
50
60
70
Loss of P2O5
Discarding rate
Magnetic field intensity, T
Figure 6. The relationship between discarding rate and P
2 O
5 loss rate of the magnetic tailings
Figure 7. Process mineralogical examination of products obtained from wet pre concentration tests
Discarding
rate/
P2O5
loss
%