developments in the processing of refractory & complex gold ores
developments in the processing of refractory & complex gold ores
developments in the processing of refractory & complex gold ores
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• Ores conta<strong>in</strong><strong>in</strong>g <strong>gold</strong> locked <strong>in</strong> solid solution or as f<strong>in</strong>e<br />
<strong>in</strong>clusions <strong>in</strong>clude:<br />
- iron/arsenic sulphide m<strong>in</strong>erals such as arsenopyrite, arsenian<br />
pyrite, and pyrite<br />
- copper sulphides such as chalcopyrite, tetrahedrite<br />
- none sulphide gangue m<strong>in</strong>erals such as silica m<strong>in</strong>erals, iron<br />
oxides<br />
• Ores with <strong>in</strong>soluble or slow leach<strong>in</strong>g <strong>gold</strong> m<strong>in</strong>erals <strong>in</strong>clud<strong>in</strong>g:<br />
– <strong>gold</strong> tellurides<br />
– aurostibnite – AuSb 2<br />
– Maldonite – Au 2 Bi<br />
ORE CATEGORIES<br />
– Fischesserite - Ag 3 AuSe 2<br />
• Ores conta<strong>in</strong><strong>in</strong>g preg-robb<strong>in</strong>g constituents such carbonaceous<br />
material or clays.<br />
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