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Complete Refractory Gold Solutions

Complete Refractory Gold Solutions. Mining World Russia. 10 April 2014. Contents. Introduction to BIOMIN BIOX ® Technology ASTER™ Technology HiTeCC Technology Conclusions. 2. Introduction to BIOMIN. Introduction to BIOMIN.

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Complete Refractory Gold Solutions

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  1. Complete Refractory Gold Solutions Mining World Russia 10 April 2014

  2. Contents Introduction to BIOMIN BIOX® Technology ASTER™ Technology HiTeCC Technology Conclusions 2

  3. Introduction to BIOMIN

  4. Introduction to BIOMIN BIOMIN is a South African based company focused on the delivery of premier, relevant solutions for the effective processing of refractory gold ores Three fully commercialized technologies: The BIOX® Process for the treatment of refractory gold ores The ASTER™ Process for the treatment of cyanide and thiocyanate contaminated solutions The HiTeCC Process for the treatment of preg-robbing and double refractory ores 4

  5. The BIOX® Process

  6. BRIEF TECHNOLOGY HISTORY • Late 1970’s – Research initiated at Gencor’s Laboratories • 1986 – Fairview 10 tpd pilot plant • 1990 – Harbour Lights: First BIOX®licence sold • 1994 – Ashanti BIOX® plant : 720 tpd BIOX® Plant (Expanded to 960 tpd in 1995) • 2005 – 2nd generation BIOX® plants • 2005 – Suzdal BIOX® plant, Sub-zero application of the technology • 2010 – Kokpatas BIOX® plant: 2,138 tpd concentrate • 2013 – 3rd / 4th Generation BIOX® Design – Runruno BIOX® Plant The BIOX® Process is owned by BIOMIN South Africa, through its wholly owned subsidiary Biomin Technologies SA 6

  7. Current and Historical BIOX® Operations

  8. BIOX®GEN III & GEN IV Refining a World Class Technology 1986 - 2010 2012/3 2013/4

  9. Generation III Design Development 9

  10. RUNRUNO Project Implementation Project owner: Metals Exploration Project location: Philippines Continuous BIOX® Pilot plant test conducted in 2010 Construction decision on 1 July 2013 Commissioning planned for Q4 2014 Both BIOX® and ASTER™ Technologies 10

  11. Key Features – GEN III • Improved engagement between all role-players: • Owners team • Project team • Equipment manufacturers • BIOMIN project team • Structured Knowledge Transfer and Training • Target decision makers from start of design process • Knowledge transfer strategy: • From design phase through to commissioning and operation • Project specific BIOMIN training material • Post commissioning engagement: • Structured audits and process optimisation • Continuous feedback on process performance and optimisation 11

  12. Key Features – GEN III Robust Design taking into consideration • Ore variability and consistency of supply over life of mine • Sufficient surge capacity • BIOX® configuration and equipment selection • Flexibility built into the design • Mechanical reliability • BIOMIN best practices guidelines • Finite Element Analyses on tank, super structure and agitator shaft and gearbox • Third party compliance review • On-site metallurgical laboratory • Continuous mill, float and BIOX® pilot plants • Variability testing of new ore zones • Process optimisation 12

  13. Schematic of RUNRUNO Plant 13

  14. IBC Container 14

  15. IBC Container 15

  16. The ASTER™ Process

  17. The ASTER™ Process Biological Process For Cyanide and Thiocyanate Destruction • Alternative Process To Inco/SO2, Caro’s Acid and Alkaline Chlorination (Chemical) • Exotic, expensive reagents (Sodium meta-bisulphate, H2SO5, hypochlorite (OCl / Cl2) • ASTER Allows • Effective water management by treating CIL/CIP residual solutions and recycling upstream • Environmentally compliant tailings disposal • ASTER Advantages • Low capital and operating cost • Safe, fertilizer type nutrients - no exotic additives • Degradation of SCN, CN, WAD CN • Commercially proven technology 2ND INDUSTRY DELIVERY (KAZAKHSTAN) VALIDATION DEVELOPMENT 3rd& 4TH INDUSTRY DELIVERY (PHILIPPINES) 1ST INDUSTRY DELIVERY (SOUTH AFRICA) 1997-2000 2007-2009 2010 2013 2014/5 *Ultimate Delivery: Cyanide detoxification of any tailings stream

  18. COMMERCIALISATION Barberton Mines, Consort Plant • Location: Barberton, South Africa • Commissioned: 2010 • Capacity: 320 m3/d • Feed: • CN- 30 mg/l • SCN- 120 mg/l • Effluent: < 0.1 ppm SCN- & CN-

  19. COMMERCIALISATION NordGold, Suzdal Plant • Location: Semi, Kazakhstan • Commissioned: 2013 • Capacity: 500 m3/d • Feed: • CN- 30 mg/l • SCN-1,200 mg/l • Effluent: < 0.1 ppm SCN- & CN-

  20. The HiTeCC Process

  21. HiTeCC Process • High Temperature Caustic Conditioning • Double Refractory Ores • Dissolved gold adsorbs onto finely disseminated carbon • Activated carbon reverses adsorption if preg robbing weak • In severe cases, large metal losses occur • Use of blinding agents partially successful – immiscible and difficult to control • HiTeCCAllows • Effective desorption of preg robbed gold from NCC • Adsorption dissolved gold onto fresh carbon • Process trialled, implemented successfully 2ND INDUSTRY DELIVERY (KAZAKHSTAN) DEVELOPMENT AT FOSTERVILLE GOLD MINE 3rdINDUSTRY DELIVERY 1ST INDUSTRY DELIVERY (FOSTERVILLE GOLD MINE) 2008-2009 2010 2014 2015/6 21

  22. Fosterville HiTeCC Implementation • Location: Bendigo, Australia • Commissioned: 2010 • Capacity: 400 tpd Combined fresh CIL tails & reclaimed tailings • Recovery: > 10 % Additional recovery attributable to use of HiTeCC circuit 22

  23. HiTeCC Process Typical Additional Gold Recoveries Through HiTeCC 23

  24. Conclusions

  25. Conclusions • Fewer oxide deposits available and increased focus on Refractory Gold deposits • Refractory ores often associated with complex mineralogy: • Presence of organic carbon • Presence of base metals and heavy metals • Variability in ore feed rate and characteristics • Cost effective environmentally friendly solutions required to treat these ore bodies: • Effective water management • Stable products safe for land disposal • Robust technology, suited to remote locations 25

  26. End

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