developments in the processing of refractory & complex gold ores

More documents

Recommendations

Info

LAS LAGUNAS ALBION LEACHING PLANT DOMINICAN REPUBLIC Ref: Xstrata/Core Paper, ALTA 2012
GEOCOAT PROCESS • Developed by GeoBiotics, USA. • Potentially lower cost option for gold locked in refractory iron/arsenic and base metal sulphide ores. • Involves coating of flotation concentrate onto a suitable substrate, e.g. crushed barren rock or low grade ore, then heap bioleaching with inoculation of naturally occurring bacteria. • Nutrients added to the circulating solution and low pressure air for bioleaching and cooling injected into the base of the heap. • The residue is unloaded and the oxidized concentrate removed by trommelling or wet screening. The concentrate residue is neutralized then subjected to conventional cyanidation. • The supporting substrate can be recycled or, in the case of low grade ore, replaced with fresh ore as needed. • Operated commercially in South Africa 2003-2006. 25
Page 1 and 2: DEVELOPMENTS IN THE PROCESSING OF R
Page 3 and 4: • Ores containing gold locked in
Page 5 and 6: Note: covellite solubility is simil
Page 7 and 8: LOCKED GOLD Iron/Arsenic Sulphides
Page 9 and 10: Oxidised or Low Sulphide Ores PREG-
Page 11 and 12: CYANIDE AND OXYGEN CONSUMING ORES R
Page 13 and 14: ROASTING OF FLOTATION CONCENTRATES
Page 15 and 16: BIO-OX OF FLOTATION CONCENTRATE For
Page 17 and 18: GRAVITY RECOVERY MAXIMIZATION, KERO
Page 19 and 20: SEQUENTIAL HEAP LEACHING For Cyanid
Page 21 and 22: PROCESS DEVELOPMENT 21
Page 23: ALBION PROCESS FLOWSHEET Run of Min
Page 27 and 28: GEOCOAT FACILITY, AGNES GOLD, SOUTH
Page 29 and 30: FOSTERVILLE CARBON MOVEMENT FLOWSHE
Page 31 and 32: BARRICK THIOSULPHATE LEACHING PROCE
Page 33 and 34: THIOSULPHATE DEMONSTRATION PLANT LA
Page 35 and 36: NEOMET PROCESS (CONT.) • Gold is
Page 37 and 38: NEOMET MINPLANT Ref: Neomet Paper,
Page 39 and 40: PRO FLOWSHEET Ref: Process Research
Page 41 and 42: GEDABEK RESIN-IN-SOLUTION PLANT Ref
Page 43 and 44: REFERENCES • Dunn, R., “Challen

developments in the processing of refractory & complex gold ores

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?