what's happening in copper hydromet - ALTA Metallurgical Services

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$developments in the processing of refractory & complex gold ores$

HEAP BIO-LEACHING OF LOW GRADE CHALCOPYRITE • There are many copper primary sulphide deposits which cannot be economically treated by conventional means due to low grade or problem impurities. • Heap leaching using common iron oxidizing bacteria, ambient temperature and conventional techniques results in very slow leaching rate and low recovery, due to a passivation layer. • Recovery is typically limited to about 30% in 3-5 years though there are some more reactive orebodies. • A number of organizations are undertaking development programs including BioHeap/Western Areas, Australia; Mintek, South Africa; BacTech, Canada; GeoBiotics, USA; BHP Billiton, Chile; BioSigma (Codelco/Nippon), Chile; Rio Tinto, USA. • Strategies include development of special bacteria cultures, maximization of operating temperature, and optimization of irrigation patterns and aeration rates. 14
MINTEK TEST HEAP AT DAREHZARE MINE, IRAN (Ref: Mintek paper, ALTA 2007) 15
Page 1 and 2: WHAT’S HAPPENING IN COPPER HYDROM
Page 3 and 4: KEY DRIVERS • The emergence of SX
Page 5 and 6: CHALLENGES • High energy consumpt
Page 7 and 8: AREAS OF DEVELOPMENTS • A resurge
Page 9 and 10: TENKE FUNGURUME FLOWSHEET, FCX, DRC
Page 11 and 12: AGITATED TANK ACIDIC FERRIC SULPHAT
Page 13: SEPON OPERATION, MMG, LAOS 13
Page 17 and 18: HIGH TEMPERATURE PRESSURE OXIDATION
Page 19 and 20: HIGH TEMPERATURE PRESSURE OXIDATION
Page 21 and 22: MEDIUM TEMPERATURE PRESSURE OXIDATI
Page 23 and 24: FCX MORENCI PROCESS FLOWSHEET 23
Page 25 and 26: TANK BIO-OXIDATION • Uses extreme
Page 27 and 28: SEMI-COMMERCIAL BIOCOP PLANT, CHILE
Page 29 and 30: GALVINOX PROCESS FLOWSHEET 29
Page 31 and 32: ALBION PROCESS • Involves atmosph
Page 33 and 34: CHLORIDE PROCESSES • Chloride lea
Page 35 and 36: SOLVENT EXTRACTION & ELECTROWINNING
Page 37 and 38: OUTOTEC EW CELL COVERS 37
Page 39: Upcoming Short Courses Copper Hydro

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