Transcript Team members

IPJ and ILR Update
New Developments
Tim Bell
Gekko Systems
May 2010
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Outline
• Brief introduction to Gekko Systems
• The InLine Pressure Jig (IPJ) and recent developments
• The InLine Leach Reactor (ILR) and recent developments
• Case Studies
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The Company
• Offices: Ballarat, Perth, Johannesburg, Vancouver, Santiago
• Agents: Russia, Peru, Argentina, Brazil
• 400 units installed in over 40 countries worldwide
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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?
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IPJ Developments –
Liberation Recovery
• Recover the mineral as soon as it is liberated – lower energy cost
• Coarse Gravity-Flotation (Python Circuit)
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IPJ Developments – Python
• Fully assembled plant
• Fast Installations and commissioning
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IPJ Developments – Multiple IPJs
• Single jig limited to 100 tph solids
•Modular pre-assembled systems
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Pirquitas Pre-Concentration
Module
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IPJ - Automation
• Automatic start and stop
sequence operation
• Provides monitoring of
streams and reaction to process
problems
• Enables automatic mass
balancing
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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
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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
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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
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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
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Continuous ILR – Improvements
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Continuous ILR – High
Tonnage Treatment Option
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Continuous ILR – Improvements
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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
2003
• >98% ILR Leach recovery
• Overall gravity recovery 2030%
• ILR produces >100k oz’s per
annum
• ILR Impacts overall recovery
by approximately 2.5%
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• High Availability – running
daily since 2003
• High Recovery (Increased
gravity recovery by 8%)
• Integral part of the overall
plant
• ILR3000BA replaced shaking
table
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!
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0
16
14
12
2
Float Conc
120
Float Tails
Float Feed
Spinner Tails
206
IPJ(2) Tails
IPJ(2) Conc
20
IPJ Feed
Cyclone
Overflow
Cyclone
Underflow
Cyclone Feed
2mm Screen
Oversize
Mill Discharge
Mill Feed
ppm Au, As and % S
IPJ Case Study
18
30
Au
S
As
10
8
6
4
0.16
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
Concentrat
Flotation
Flotation Tails
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
0.6
21.7*
0.56
8.0
0.02
Grade, % S
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