SIMPLICITY IN LEACHING

WHY CHOOSE ALBION PROCESS™?

• Atmosphericleaching, with noneed for pressureor bacterialleaching

• Significantlylower capital andoperating costs

• Proventechnology basedon operationaland processengineeringexpertise

• Suited torefractoryprecious andbase metals

• Easily integratedwith CIP/CIP andother processes

• Converts arsenicminerals toenvironmentallystable products,no S02 formation

• Efficient captureof oxygen inprocess

• High metalrecovery

• Simple to operate

THE CONCENTRATE IS FINELY GROUND UNDER ATMOSPHERIC CONDITIONS

Fine grinding in energy-efficient IsaMills™ introduces a high degree of strain into the sulphide mineral lattice, increasing the number of grain boundary fractures in the mineral. It also prevents passivation of the leaching surface, as the mineral disintegrates before the precipitate becomes thick enough to form a passive layer.

SLURRY IS LEACHED IN ALBION LEACH REACTORS VIA HYPERSPARGE™

After the concentrate has been finely ground, the slurry is leached in Albion Leach Reactors. Oxygen is introduced into the Albion Leach Reactors via HyperSparge™, leaching the slurry by oxidizing the sulphide minerals.

MINERAL IS RECOVERED THROUGH CONVENTIONAL PROCESSES

Once leached, the slurry is passed into conventional processes to recover the mineral, while the tailings are treated for disposal. Any arsenic minerals are converted into ferric arsenates or other stable compounds so they can be safely stored in tailings.

Key steps in the Albion Process™

The Albion Process™ is a proprietary process for treating refractory concentrates using a combination of ultrafine grinding andoxidative leaching at atmospheric pressure. It allows metals to be recovered by conventional means by oxidizing sulphides andliberating metals in the feed. The Albion Process™ was developed in 1994 by Glencore Technology, and is patented worldwide.

Conventional downstream metal recovery

Albion Leach Reactor

WHO SHOULD USE ALBION PROCESS™

Albion Process™ is a proven solution for plants involved in the processing of precious and base metal concentrates, including zinc, copper, refractory silver and refractory gold.

It is suited to the oxidation of sulphide ores and concentrates for the recovery of copper, cobalt, nickel and zinc or the downstream recovery of gold, silver, PGM’s, lead, sulphur and molybdenum.

It is a robust and simple process, and can treat highly variable feed containing many target elements.

Byproducts are recovered, maximising value from the feed.

Proven, proprietary technologiesThe advanced technologies involved in the Albion Process™ are all designed by Glencore Technology, and provide simple, robust operation.

The Albion Leach Reactor is an agitated vessel using centrally located dual hydrofoil impellers. Oxygen is introduced via HyperSparge™ to the leach slurry at supersonic velocity to maximise mass transfer efficiency and ensure efficient oxidation of the sulphides. The Albion Leach Reactors are based on the modular and easy to install ZipaTank™ technology.

IsaMill™ is a large-scale, energy-efficient intensity grinding technology. It optimises conditions for good leach recovery by producing a very sharp size distribution in open circuit. Open circuit operation provides good slurry density for the leaching circuit, simplifying water balance and minimizing capital cost.

ZipaTank™ is a modular tank design with bolted joins meaning no site welding. The tanks are rapid to install requiring minimal skilled labour. The tanks are relocatable if required. The ZipaTank™ is typically 15% lower cost than a welded tank (including installation).

HyperSparge™ is a proven, cost-effective sparging system for delivering air, oxygen or other gases for leaching or oxidation processes. It injects a supersonic jet of gas, which creates high local shear rates and fine bubbles, resulting in very efficient mass transfer and oxygen utilisation. The HyperSparge™ can be inserted and removed from a full tank minimising downtime.

The Albion Process™ is a proprietary process for treating refractory concentrates using a combination of ultrafine grinding and oxidative leaching at atmospheric pressure. It allows metals to be recovered by conventional means by oxidizing sulphides and liberating metals in the feed. The Albion Process™ was developed in 1994 by Glencore Technology, and is patented worldwide.

“ The use of atmospheric pressure leaching offers considerable capital cost savings over alternative technologies.”– GeoProMining, ‘A new lease of life’, Mining Magazine, September 2013

ONGOING SERVICE AND SUPPORT

Glencore Technology prides itself on delivering comprehensive, end-to-end support for its products, from initial design to after-market support. We strive to develop enduring relationships, so that customers can be confident of receiving the support they need to enjoy outstanding, enduring performance from the Albion Process™.

ABOUT GLENCORE TECHNOLOGY

Glencore Technology develops, markets and supports technologies for the global mining, mineral processing and metals extraction industries. Glencore Technology is a wholly owned subsidiary of the Glencore group, operating in Australia, Russia, Chile, South Africa, Canada, China and the UK.

Albion Process™ in action

Refractory goldARARAT PROCESSING PLANT, GPM GOLD, ARMENIA

• Gold hosted in pyrite andarsenopyrite

• Fully designed, supplied andcommissioned in June 2014 byGlencore Technology

• Producing 120 kozpa gold at 98%gold recovery

• 14 week commissioning

• HyperSparge™ technology used foroxygen injection

• ZipaTank™ technology used for leachreactors and storage vessels

Bulk zinc/lead sulphide concentrateNORDENHAM, GERMANY

• Commissioned in 2011

• Throughput 36,000 tpa concentrate,producing 16,000 tpa zinc metal at99% recovery

• HyperSparge™ technology used foroxygen injection

• Integrated into existing zinc refinery

• Produce metal without roasters

• Lead and silver recovered andprocessed

Refractory silver/goldLAS LAGUNAS, DOMINICAN REPUBLIC

• Commissioned in 2012 and producing80 kozpa gold, 350 kozpa silver

• Refractory gold hosted in pyrite

• HyperSparge™ technology used foroxygen injection

ABOUT GLENCORE

Glencore is one of the world’s largest global diversified natural resource companies and a major producer and marketer of more than 90 commodities. We employ around 181,000 people across more than 150 mining and metallurgical sites, oil production assets and agricultural facilities.

With a strong footprint in both established and emerging regions for natural resources, Glencore’s industrial and marketing activities are supported by a global network of more than 90 offices located in over 50 countries.

Our customers are industrial consumers, such as those in the automotive, steel,

power generation, oil and food processing industries. We also provide financing, logistics and other services to producers and consumers of commodities.

More information is available at www.glencore.com

Support from project evaluation to full plant production.

Treats variable low grade and contaminated feed

ZeroSO2 emissions

Residue passes TCLP leachability levels allowing safe disposal

Low capital and operating costs

Modular, small footprint Simple to construct and operate

98% Plant recovery of Au, Cu, Zn and Ni

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18 monthsfrom design to commissioning

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www.albionprocess.comwww.glencoretechnology.com

CONTACT

Glencore Technology Pty Ltd

Level 10, 160 Ann St Brisbane QLD 4000 Australia

Tel +61 7 3833 8500 Fax +61 7 3833 8555 Email albionprocess@glencore.com.au

Chile · Tel +56 2 3242 9000 South Africa · Tel +27 82 441 7482 Russia & CIS · Tel +7 968 826 5058

Glencore operates mines throughout the world. Tough testing grounds that make our process technologies the best on earth.