Agenda

Conference Day One: Wednesday 29th April 2009

DAY ONE | DAY TWO

8.30 Morning Coffee

9.00 IIR Welcome

9.10 Opening Remarks from the Chair

9.20 CASE STUDY
Improvements in cost of ore processing from the change to composite liners and lifters in the SAG mill at Peak Gold Mines

• Change from steel to steel/rubber composite lining and lifters
• SAG mill 25 tonnes lighter than before the change. Lighter mill = lower kWh
• Composites increased service life
• Increased mill throughput (assisted by some plant mods) by 25%
• System is 60% more expensive (on 2006 steel prices) but 10% decrease in $/t
• Still room for optimisation

Tim Mitchell, Plant Metallurgist, Peak Gold

10.00 CASE STUDY
Phu Kham - A Retrospective View

• The Phu Kham concentrator is the most cost effective large copper/gold concentrator constructed in recent times.
• The project is located 150 km North of Vientiane in Laos and was designed to treat 12 Mt/a of copper /gold ore.
• The presentation will cover the design intent from and engineer's perspective and the actual performance from an operator's perspective.

Greg Lane, General Manager, Ausenco

10.40 Morning Tea

11.10 Enhancing Flotation Performance through Grinding Chemistry

• What happens in grinding mills?
• Impact of grinding on flotation
• What can one do to overcome problems?
• Some practical case studies
• The case of regrinding

Dr Sabina Gredelj, Research Fellow - Ian Wark Research Institute, University of South Australia

11.50 New Technology introduced by JKMRC - Currently in developmental stages

• Concept
• Experimental reproducibility and precision, qa/qc
• Estimation of crushing and grinding hardness in its applications
• Validation
• Technology transfer initiatives
• Index benefits

Dr Toni Kojovic, Research Associate, JKMRC, The University of Queensland

12.30 Lunch

1.40 PANEL DISCUSSION: Are Vertimills really more efficient than ball mills for finer grinding?

2.40 Afternoon Tea

3.10 CASE STUDY:

A technical insight into the processing operations at a mine site scheduled for completion, and ready for production, in mid 2009. This presentation will focus on the design aspects of the proposed comminution circuit at this mine site.
Jeff Bowen, Senior Processing Engineer, Ausenco

3. 50 Trends With Selection & Sizing of Vibrating Screens-Whats Available In the Marketplace

Modern vibrating screens are being asked to operate at increasingly higher levels of performance. What are the critical factors to consider when sizing modern vibrating screens? An independent review of recent installations and applications is presented.

• Factors affecting selection & sizing
• Screen capacity
• Screen efficiency
• Choice of cloths
• Maintenance aspects

Damian Connelly, Principal, METS

4.30 Closing Remarks from the Chair

5.00 Networking Drinks

6.30 Conference Dinner

Conference Day Two: Thursday 30th April 2009

DAY ONE | DAY TWO

9.00 Opening Remarks from the Chair

9.10 CASE STUDY: Ridgeway Deeps and Beyond - Circuit Modifications to Suit a New Orebody

This paper will focus on:

• Current operating conditions at the Ridgeway concentrator and the expected impact of a new orebody on performance
• Design considerations associated with the upgraded circuit
• Construction and commissioning in a brownfield environment
• Expected v Actual operational data from the upgraded circuit

Andrew Tew, Senior Process Engineer, Ausenco

9.50 Recent Developments in high efficiency IsaMill grinding

• Applications of 3MW (4000 hp) IsaMill to improve efficiency and reduce capital for conventional regrinding
• Performance of the world's first primary grinding IsaMill at McArthur River
• Developments in low cost inert grinding media
• Improvements in wear materials and maintenance cycles.
• New projects update - Goldcorp Penasquito, Oz Minerals Prominent Hill, Somincor Neves Corvo, Teck Red Dog.
• Technical update : accurate measurement energy consumption for grinding below 100 microns.

Steve Smith, IsaMill Operations Manager, Xstrata Technology

10.30 Morning Tea

11.10 PANEL DISCUSSION: What role do lifters play in SAG Milling (not all is what it seems)?

11.50 An update on the Deswik Mill Development

• Vertical hydraulic drive high speed bead mill
• Change discs without removal of impellor
• 30 week ex works production time
• Reduce Carbon footprint by halving fine grind energy consumption
• Rapid recovery with low standard deviation on size requirements
• Compact design

Stephen Massey, Manager, Deswik Milling

12.30 Lunch

1.40 CRUSHING & GRINDING 2009 INCLUSIVE WORKSHOP:
Selection Sizing & Developing the optimum comminution circuit for your Project

Comminution is a significant capital and operating cost in all mineral processing plants. The drive to reduce energy consumption is particularly relevant here because some fifty percent of the operating cost can be associated with comminution. It is important to fully determine the comminution parameters relevant to the crushing and milling of an ore to enable complete plant design to take place.

ABOUT THE WORKSHOP

SESSION 1

• Sampling for comminution testing
• Geometallurgy - lithology, mineralisation
• Ore characterisation
• Developing the Comminution Testplan
• Sample masses and drill core sizes
• Testwork required for studies
• Interpreting the results
• Nine Alternative comminution circuits
• Developing the Design Specification
• Operating cost comparison
• CAPEX comparison
• Piloting
• JK Simulation & modelling
• Risk analysis - operability and maintainability
• Equipment selection & sizing
• Process control of comminution circuits
• Important design considerations, layout and trends

SESSION 2

The projects that will be covered include:

• CASE STUDY 1: Dual High Aspect SAG Ball circuit with unusual flexibility
• CASE STUDY 2: Single Stage SAG with two ore feed types
• CASE STUDY 3: SAG Ball circuit changed to Single Stage AG mill with pebble crusher

WORKSHOP PRESENTERS

Damian connelly
Damian is a Consulting Engineer with over 40 years extensive experience in the gold, copper, lead, zinc, uranium and iron ore industries with particular emphasis on gold. Experience has been gained in plant operations feasibility studies, detailed design, construction and commissioning, and all unit operations.

He has participated in process design, process review and numerous studies on comminution circuits and numerous test programmes for resource projects. His experience including commissioning grinding circuits will form the basis of the workshop.

Dr Denis yan
Denis has over 40 years experience in mining and mineral processing environments. In senior university roles Denis led substantial cutting edge research programmes and taught at the WA School of Mines as Program Chair (Metallurgy). Denis is the author of 32 papers and a popular resource text in mineral processing. His competency in the use of JK SimMet will be used to address the case studies for the workshop using actual project data and examples.