1. Coalition for Eco-Efficient Comminution

2. Vision To accelerate implementation of eco-efficient comminution strategies through promotion of research, data and industry benefits

3. PatronOwen Hegarty G-Resources Group Board Chair Elizabeth Lewis-Gray Gekko Systems DirectorProf Tim Napier-Munn JKMRC DirectorDr Wayne Stange AMIRA DirectorDr Mike Daniel CMD Consulting DirectorDr Zeljka PokrajcicWorley Parsons

4. CEEC Sponsors

5. Comminution Energy Consumption 4 – 9% Australia’s electricity consumption 30 – 40% total mine Source: CSRP Eco-Efficient Liberation – Outcomes and Benefits 2003-2010

6. Comminution Energy Consumption CO 2 contributions for the stages of copper concentrate production, Source: Norgate and Haque, 2010

7. Typical site comminution energy footprint Source Le Nause, Temos 1992

8. Understand mineral and gangue liberation characteristics Reject gangue or recover mineral in crushing step, prior to milling Recover mineral or gangue at coarsest particle size More crushing less grinding Utilise new and more energy efficient technologies Eco Efficient strategies

9. Selection of the coarsest possible grind size Energy & grind size Source: Hukki RT, 1961

10. Optimum liberation

11. Coarser grind may improve recovery

12. More crushing – less grinding Ball mills only apply 5% of energy used to particle size reduction Fine crushing is more energy efficient Very low power consumed in supporting systems such as pumping and conveyors

13. “The most efficient way to break rock, is not to break rock at all” Dr Rob Morrison, JKMRC

14. Blasting – Optimise fragmentation to maximise fines in ROM ore – “Bricks and mortar” Screening: – ahead of, and in, the grinding circuit Gangue Rejection Pre-concentration Concentration Improved ore presentation and flow sheets

15. Fine crushing – VSI – HPGR Fine Screening Ore Sorting Gravity – continuous & batch – InLine Pressure Jig – Centrifugal Concentrators Coarse Flotation Improving technologies

16. Castlemaine Goldfields plant

17. New flowsheet with gangue rejection Recovery increased by maximising gravity recovery, finer grind, increased head grade to process plant.

18. Benefits of New Process for site Lower Capital Cost for Greenfields Installation Net reduction in energy consumption Increased gold recovery Increased gold production Reduced $/oz operating cost of gold produced

19. CEEC Linked In discussion page

20. CEEC Linked In Discussions Ore sorting Microwave technology Blasting techniques Comminution research Conference blogs

21. CEEC – Website Home Page

22. CEEC – Key Papers

23. CEEC Sponsors

24. End