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ALTA10-Presentationtion-100524

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					         IPJ and ILR Update
           New Developments


                                    Tim Bell
                              Gekko Systems
                                  May 2010




ALTA10
                            Outline


    • Brief introduction to Gekko Systems
    • The InLine Pressure Jig (IPJ) and recent developments
    • The InLine Leach Reactor (ILR) and recent developments
    • Case Studies




ALTA10
               The Company




  • Offices: Ballarat, Perth, Johannesburg, Vancouver, Santiago
  • Agents: Russia, Peru, Argentina, Brazil
  • 400 units installed in over 40 countries worldwide


ALTA10
                      IPJ Technology

   •Targets >100 µm free gold and > 200 µm sulphides
   •Continuous mass pull 5 – 30%
   • Best in circulating loads of crushing and grinding mills
   •Pre-concentration
   •IPJ Development. Why?




ALTA10
              IPJ Developments –
              Liberation Recovery
   • Recover the mineral as soon as it is liberated – lower energy cost
   • Coarse Gravity-Flotation (Python Circuit)




ALTA10
         IPJ Developments – Python
  • Fully assembled plant
  • Fast Installations and commissioning




ALTA10
  IPJ Developments – Multiple IPJs
   • Single jig limited to 100 tph solids
   •Modular pre-assembled systems




ALTA10
     Pirquitas Pre-Concentration
               Module




ALTA10
               IPJ - Automation

 • Automatic start and stop
 sequence operation
 • Provides monitoring of
 streams and reaction to process
 problems
 • Enables automatic mass
 balancing




ALTA10
         IPJ – Integration into circuits

 •Through bed jigging
 •Ceramet ragging SG 2 to 5.0
 •Gravity feed or pump feed
 •Direct coupled pumps
 •Pressure monitoring and dump valves
 •Polyurethane piping spools




ALTA10
               ILR - Technology

   • Slow rolling drum 1-2 rpm
   • Standard reagents only
   • High dO levels Up to 10 ppm using H2O2 as the oxidant
   and up to 25ppm when using O2
   •Batch Leach reactors. Models to treat batches of 900 -
   24,000 kg
   •Continuous leach reactors. Models up to 2.1 t/hr installed
   and Super ILR available up to 9 t/hr



ALTA10
          Batch ILR – Improvements

   ILR rolling drum technology – The most efficient chemistry!




 Single solution cone, single pump
 Automation provides largely hands free operation
PLC program optimisation

ALTA10
            Batch ILR – Sizing Tool

   GRG Testwork and/or Plant Survey Data

   AMIRA P420 Gravity Model – Estimates the size of a gravity
  circuit required

  The model provides a clear picture of the recovery gain by
  increased % of product feed.

  In a typical grinding circuit application the tool will direct you
  as to which is the more appropriate stream to feed the BCC.

   ILR can then be selected to match the BCC yield


ALTA10
         Continuous ILR – Improvements




ALTA10
           Continuous ILR – High
         Tonnage Treatment Option




ALTA10
ALTA10

  Continuous ILR – Improvements
ALTA10
         Gravity Box
                 Gravity Box

 Fully engineered package of screen, concentrator, ILR, frames,
piping, electrical, automation, installation and commissioning.

 Pre-assembled during fabrication to ensure rapid installation.

Suitable for new plant or existing upgrade.

Standard designs at various tonnages completed and repeatable
(drawing packages and or complete assembly options available)

Specifically designed to assist engineers and operators in meeting
tight deadlines in a climate that is seeing more gold projects fast
tracked, juniors starting operations on strict capex budgets and
engineers pushed on lead times.
   Batch ILR Case Study – St Ives
   • ILR3000BA in operation since   • High Availability – running
   2003                             daily since 2003
   • >98% ILR Leach recovery        • High Recovery (Increased
   • Overall gravity recovery 20-   gravity recovery by 8%)
   30%                              • Integral part of the overall
   • ILR produces >100k oz’s per    plant
   annum                            • ILR3000BA replaced shaking
   • ILR Impacts overall recovery   table
   by approximately 2.5%




ALTA10
   Batch ILR Case Study – Target


   •     ILR100BA in operation since
         2002
   •     >98% ILR Leach recovery
   •     Overall gravity recovery ~50%
   •     ILR Impacts overall recovery
         positively
   •     High Availability
   •     High Recovery
   •     Integral part of the overall plant
   •     Has eliminated historical security
         concerns

 St Ives, Agnew, Kelian & Target ILR Batch units formed the foundation of batch IC technology
 to grow to more than 150 installations of the unit process globally in <10 years!
ALTA10
                            ppm Au, As and % S




                 0
                      2
                             4
                                 6
                                     8
                                         10
                                              12
                                                    14
                                                         16
                                                               18
                                                                      20
     Mill Feed


Mill Discharge


 2mm Screen
  Oversize


Cyclone Feed


    Cyclone
   Underflow
                                                                           IPJ Case Study




    Cyclone
    Overflow


     IPJ Feed
                                                                    206




  IPJ(2) Conc


  IPJ(2) Tails
                                                                    120




Spinner Tails


   Float Feed
                                                     S
                                               As
                                                          Au
                                                                    30




                     0.16




   Float Tails


   Float Conc
                        IPJ Case Study


   • Gravity circuit consists of IPJ’s in HPGR and ball mill combination
   grinding circuit, IPJ concentrate to Gekko ISPs, flotation scavenging.

   • 86-92% Au gravity recovery

   • 97-99% Au overall recovery

                                    Mill Feed      ISP       Float Feed     Flotation      Flotation Tails
                                                Concentrat                Concentrate
                                                    e
            Solids flowrate, t/hr      70          0.13        69.9       5.4** – 1.2***   64.4** – 68.7***
            Au Passing, g/hr          885          809         76.2           60.6              10.1
            S Passing, t/hr           0.42         0.03        0.39           0.35              0.01
            Grade, g/t Au            12.6*        6,321*       1.09           29.8              0.16
            Grade, % S                0.6         21.7*        0.56            8.0              0.02




ALTA10
ALTA10




         End

				
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