XXXI International Mineral Processing Congress 2024 Proceedings/Washington, DC/Sep 29–Oct 3 2141
Table 4. Mineral composition of Mozley concentrates determined by TIMA
Mineral Formula Mozley Conc. CT (wt.%)
Pyrite FeS2 84.75
Galena PbS 1.67
Chalcopyrite CuFeS
2 0.14
Hematite /Magnetite Fe
2 O
3 /Fe
3 O
4 2.055
Tennantite (Cu,Fe,Zn)12As4S13 0.27
Tetradymite Bi2Te2S 0.065
Hodrushite Cu
4 Bi
6 S
11 0.01
Petzite Ag
3 AuTe
2 0.03
Hessite Ag2Te 0.02
Goldfieldite Cu12(Sb,Te)4S13 0.01
Gold Au 0.009
CuNi Sulfides Cu
x Ni
y S
z 0.01
Tetrahedrite (Cu,Fe,Zn)12(Sb,As)4S13 0.009
Electrum Au0.8Ag0.2 ND.
Laitakarite Bi
4 (Se,S)
3 ND.
ND. =Not detected
0
20
40
60
80
100
0.0 0.1 1.0 10.0 100.0
Grain Size (m)
Tetradymite in CT Au-Ag minerals in CT
Figure 3. The particle size distribution of tetradymite and Au-Ag minerals, with P80 shown as a
solid black line and P50 or median shown as a dashed black line
Table 5. Liberation analysis of Te, Ag, and Au minerals in CT
Mineral Tetradymite Locking (wt.%) Au-Ag Mineral Locking (wt.%)
Pyrite 94.7 93.3
Apatite 0.1 0
Hematite/Magnetite 1.5 0.9
Calcite 0.2 0
Free surface 3.3 5.7
Cummulative
Passing
(%)