Research Article
Study on Vacuum Roasting Pretreatment of Carbonaceous Gold Concentrates Based on Nonoxidation Technology
Table 2
Mineral compositions of the sample.
| Mineral name | Molecular formula | Weight percent (Wt%) | Area percent (area%) | Particle counts | Mineral number |
| Quartz | SiO2 | 72.34 | 76.85 | 109448 | 126686 | Pyrite | FeS2 | 6.50 | 3.62 | 7874 | 9795 | Goethite | Fe2O3·H2O | 3.33 | 2.45 | 5415 | 7963 | Roscoelite | K (V, Al, Mg)2AlSi3O10(OH)2 | 3.33 | 3.23 | 7764 | 9080 | Kaolinite | Al2O3·2SiO2·2H2O | 2.98 | 3.19 | 6827 | 8556 | Muscovite | KAl2[Si3AlO10] (OH, F)2 | 2.58 | 2.54 | 4348 | 4796 | Barite | BaSO4 | 1.88 | 1.17 | 1348 | 2036 | Dolomite | CaMg(CO3)2 | 1.74 | 1.70 | 1663 | 1866 | Apatite | Ca5(PO4)3(F, Cl, OH) | 1.45 | 1.27 | 1034 | 1183 | Pyrrhotite | FexSx+1 | 0.85 | 0.51 | 1031 | 1159 | Potash feldspar | K2O·Al2O3·6SiO2 | 0.21 | 0.23 | 385 | 461 | Sphalerite | ZnS | 0.14 | 0.10 | 86 | 87 | Calcite | CaCO3 | 0.05 | 0.05 | 45 | 54 | Native gold | Au | — | — | 1 | 1 | Others | — | 2.62 | 3.09 | 8902 | 11566 |
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