Petra Diamonds Limited · LSE:PDL
Petra Diamonds — Technical Presentation (July 2015)
13 slides from Petra Diamonds's technical presentation, Jul 27, 2015
Slide 1: The New Cullinan Plant
The New Cullinan Plant 27 July 2015
Slide 2: Important Notice
Important Notice These Presentation Materials do not constitute or form part of any invitation, offer for sale or subscription or any solicitation for any offer to buy or subscribe for any securities in the Company nor shall they or any part of them form the basis of or be relied upon in any manner
Slide 3: Significantly Reduced Footprint
Significantly Reduced Footprint COMPARISON – CURRENT vs AG MILLING PLANT Current plant commissioned in 1947 Current Plants New AG Milling Plant (Main, DTP & OSP) 6.0Mt ROM capacity 2.8 Mt ROM Initial feed: Throughput p.a. 2.5 Mt Tailings 4.0 Mt ROM 2.3 – 2.5 Mt Tailings Total footprint ca. 27 ha ca.
Slide 4: Benefits of New Plant
Benefits of New Plant • Construction cost of ca. ZAR1.65 billion (ca. US$142.8 million) Strong stand-alone economics • Payback of ca. 3 years and IRR of 25% • Top-cut of 75mm (will cater for diamonds of +3,000 carats, such as the Cullinan diamond) ‘Softer’ liberation protecting • +25mm material only
Slide 5: Schematic of new AG Milling Plant
Schematic of new AG Milling Plant 1. ROM Feed 2. ROM Silo and 9 14 Return Silo 3. Mill Section 10 4. XRL Recovery 12 3 5. HPGR Crusher 6. DMS Plant 11 7. Final Recovery 8. Tailings Disposal 6 5 9. Slimes Disposal 4 7 13 10. New Eskom 8 2 Substation 11. MV Substation 12. Re-mined Material 13. Pump St
Slide 6: Simplified Process Flow Diagram
Simplified Process Flow Diagram Note 1: 6Mtpa ROM ready 6
Slide 7: Development Schedule
Development Schedule Date Milestone Capex timing FY 2015 ZAR 106m (actual) • Q4 • MDM Engineering contracted to deliver the plant • Earthworks commenced • All major long lead items ordered FY 2016 ca. ZAR 950m (guidance) • Ongoing • Construction phase FY 2017 ca. ZAR 600 m (guidance) • H1 • Construc
Slide 8: Appendix
Cullinan, South Africa Appendix
Slide 9: Cullinan – History of Large Diamond Recoveries
Cullinan – History of Large Diamond Recoveries Acquisition by Petra 9 July 2008
Slide 10: Iconic Diamonds from Cullinan
Iconic Diamonds from Cullinan The Greater Star of The Centenary Africa 599.10ct rough, Largest polished yield 273.85ct polished from the Cullinan at 1986 530ct; sits in the Royal Sceptre 1905 The Cullinan Heritage 507.55 carats rough 2009 The Golden Jubilee The Safia 755.50ct rough, 338.46ct rough,
Slide 11: Energy efficiencies & Power consumption
Energy efficiencies & Power consumption • 12% increased energy efficiency per tonne: • Average 5% efficiency improvement: use of IE3 Top Premium motors, enabling an almost constant efficiency in the 75-100% load range • Ca. 15% energy usage saving: all conveyor drives and pumps will be controlled wi
Slide 12: Glossary
Glossary • AG Milling Autogenous Milling: a method of comminution using attrition to enable the self-grinding of ore: a rotating drum throws larger rocks of ore in a cascading motion which causes impact breakage of larger rocks and compressive grinding of finer particles • Comminution The reduction
Slide 13: Cullinan, South Africa
Cullinan, South Africa