410
C. C. S. de Oliveira and D. D. Pereira
Table 1
Composition of a typical zinc concentrate with low and high iron content and zinc sulfide concentrate variability (not a complete survey on possible
compositions, but a mere analysis on 36 concentrates available)
Low iron content
High iron content
Concentrate variability
Element
%
Mineral
%
Element
%
Mineral
%
Element
% min.
% max.
Ag
0.0057
Ag
2 S
0.0065
Ag
0.0002
Ag
2 S
0.0002
Ag
0.0001
0.0070
Al
0.25
Al
2 O
3
0.48
Al
0.31
Al
2 O
3
0.59
Al
0.08
0.50
As
0.024
AsS
0.017
As
0.016
AsS
0.011
As
0.0001
0.0360
Ca
0.66
CaCO
3
1.63
Ca
0.50
CaCO
3
1.23
Ca
0.07
0.70
Cd
0.39
CdS
0.51
Cd
0.15
CdS
0.20
Cd
0.085
0.960
Cl
0.0047
CaCl
2
0.0074
Cl
0.0032
CaCl
2
0.0050
Cl
0.0047
0.0032
Co
0.00077
CoS
2
0.0016
Co
0.00383
CoS
2
0.0080
Co
0.0008
0.0210
Cu
0.50
Cu
2 S
0.63
Cu
0.65
Cu
2 S
0.81
Cu
0.10
0.70
Fe
4.85
FeS
2
9.56
Fe
12.77
FeS
2
14.10
Fe
9.00
14.00
Fe
2 O
3
0.58
Fe
2 O
3
8.88
Ge
0.00053
GeS
0.00076
Ge
0.00050
GeS
0.00072
Ge
0.0005
0.0008
Hg
0.0083
HgS
0.0097
Hg
0.0007
HgS
0.0008
Hg
0.0005
0.0100
In
0.0067
InS
0.0086
In
0.0146
InS
0.0187
In
0.0067
0.0170
Mg
0.16
MgCO
3
0.55
Mg
0.10
MgCO
3
0.35
Mg
0.08
0.60
Mn
0.18
MnS
0.29
Mn
1.12
MnS
1.77
Mn
0.18
2.90
Ni
0.0014
NiS
0.0021
Ni
0.0018
NiS
0.0028
Ni
0.0007
0.0300
Pb
0.70
PbS
0.80
Pb
0.49
PbS
0.57
Pb
0.05
4.00
S
32.74
–
S
31.88
–
S
30.00
40.00
Sb
0.013
Sb
2 S
3
0.0187
Sb
0.002
Sb
2 S
3
0.0025
Sb
0.0003
0.0020
SiO
2
2.37
SiO
2
2.37
SiO
2
0.34
SiO
2
0.34
SiO
2
0.15
3.50
(continued)