REJUVENATING OLD EQUIPMENTOLD … UPGRADES Disppyerser and hood assembly 5 sector unreinforced...
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REJUVENATING OLD EQUIPMENT OLD EQUIPMENT Presented by: Peter Lines 1 August 6, 2010
Transcript of REJUVENATING OLD EQUIPMENTOLD … UPGRADES Disppyerser and hood assembly 5 sector unreinforced...
REJUVENATING OLD EQUIPMENTOLD EQUIPMENT
Presented by: Peter Lines
1August 6, 2010
THICKENER MECHANICALADVANCESADVANCES
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THICKENER DRIVE UPGRADES:
Mechanical options availableCommercial VS ProprietaryCommercial VS ProprietaryHigh EfficiencyLower individual replacement costsSimple accurate and reliable Simple, accurate, and reliable
torque monitoringLead times on proprietary gears
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THICKENER DRIVE UPGRADES:
• From old :
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THICKENER DRIVE UPGRADES:
• To new:
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THICKENER DRIVE UPGRADES:• or this:
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THICKENER DRIVE UPGRADES:
• From old :
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THICKENER DRIVE UPGRADES:
• To new :
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THICKENER DRIVE UPGRADES:
• From old :
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THICKENER DRIVE UPGRADES:
• To new :
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THICKENER DRIVES
• Or This:
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• To This:
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THICKENER TORQUE PROTECTIONTHICKENER TORQUE PROTECTIONTHICKENER TORQUE PROTECTION
From Old: Compression spring packs p p g p Complex linkages Difficult to calibrate Lead times on replacement parts
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THICKENER TORQUE PROTECTION
From old:
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THICKENER TORQUE PROTECTION
From old:
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THICKENER TORQUE PROTECTION
To New: Precision Load Cells Split gearbox drive Simple electronic calibrate Multiple units Quick replacement part delivery
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THICKENER TORQUE PROTECTION
To new:
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THICKENER TORQUE PROTECTION
To new:
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THICKENER TORQUE PROTECTION
To new:
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THICKENER TORQUE PROTECTION
L d C ll T C t l P lLoad Cell Torque Control Panel:
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THICKENER RAKE DESIGN:
THICKENER RAKE DESIGN:From old:From old: large box section space frames Large frontal area Large frontal area Prone to scale build up Provide mechanical support for island formation Provide mechanical support for island formation
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THICKENER RAKE DESIGN:From old:From old:
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THICKENER RAKE DESIGN:From old:From old:
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THICKENER RAKE DESIGN:
From this:
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THICKENER RAKE DESIGN:
To this: Single RHS main rake arm small frontal area small frontal area Minimum support for scale build up Minimum support for island
formationformationMinimum torque contribution VS
tprocess torque
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THICKENER RAKE DESIGN:
To new:
Scaling Application40m diam
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THICKENER RAKE DESIGN:
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THICKENER RAKE DESIGN:
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THICKENER RAKE LIFT UPGRADES:
Many old small diameter Bridge hi k h d l lif i d ithickeners had manual lifting devices
These can be motorisedThese can be motorisedThese can be replaced with
lt ti lifti d i d alternative lifting devices and new style rake drive mechanisms
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THICKENER RAKE LIFT UPGRADES::
From old:
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THICKENER RAKE LIFT UPGRADES:
To new:
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THICKENER RAKE LIFT UPGRADES:
To new:
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THICKENER RAKE LIFT UPGRADES:To newest:
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SEDIMENTATION PROCESSADVANCESADVANCES
FEED DILUTION SYSTEMS:
THICKENER FEED DILUTION SYSTEMS:Modern FlocculantsAllow much higher Settling ratesAllow much higher Settling ratesAllow higher unit areasE bl i ifi t it iEnable significant capacity increasesTestwork to determine optimum process
conditions
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FEED DILUTION SYSTEMS:
Thickener Development
FEED DILUTION SYSTEMS:
p
Conventional
Hi h R t fl +dil tiHigh Rate – flocc +dilution
Hi h d it fl + dil ti +High density – flocc + dilution +compression
Deep Cone – flocc + dilution +compression + residence time
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FEED DILUTION SYSTEMS:
Effect of Feed Concentrationy/
m2
ne
•On Flocculation
•On Settling Rate
nes/
day
kg/to
nn•On Settling Rate
ux, t
onn
t Dos
e,
tling
Flu
ccul
ant
Feed Solids Concentration, wt%
Sett
Floc
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FEED DILUTION SYSTEMS:
TYPICAL MINERAL TAILSOPTIMUM FEED SOLIDS
ERA Ranger - CCD1 S ttli FlSettling Flux
3000
3500
m2
1500
2000
2500
ux
Kg/
h/m
500
1000
1500
Settl
ing
Flu
10 g/t Flocc 20 g/t Flocc
30 g/t Flocc 40 g/t Flocc
0
500
2.0% 4.0% 6.0% 8.0% 10.0% 12.0% 14.0% 16.0%Weight % Solids
S 30 g/t Flocc 40 g/t Flocc
g
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FEED DILUTION SYSTEMS:4 Importance of Solids Flux
Settling Rate [m/hr]
Solids Flux t/m2/h
Solids throughput tph
Thickener Feed Solids Concentration [wt %]
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FEED DILUTION SYSTEMS:
FEED DILUTION SYSTEMS• E-DUC:• E DUC:
Polymer
Undiluted Feed Diluted FeedMix Tube
SupernatantBed
Supernatant
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FEED DILUTION SYSTEMS:
Modifying Feed Solids to Give Optimum Solids Flux
High Solids
• Feed dilution in the feedwell.feedwell.
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FEED DILUTION SYSTEMS:
• From old:
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FEED DILUTION SYSTEMS:
• To new E-Duc:
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FEED DILUTION SYSTEMS:
• To new:
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Filtration upgradesFiltration upgradesVacuum Filter Upgrades comprising:Vacuum Filter Upgrades comprising:Improved Hydraulics –High flow streamlined valvesCommercial DrivesExternal filtrate pipes vs cast centre shafts-Disk FiltersFiltersVat Slurry suspension vs Swing/Paddle AgitatorsElimination of submerged bearings/vat stuffing Elimination of submerged bearings/vat stuffing boxes
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Filtration upgradesFiltration upgradesVacuum Filter Upgrades:
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Filtration upgradesFiltration upgradesVacuum Filter Upgrades:- Eductor Vat agitation
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Filtration upgradesFiltration upgradesVacuum Filter Upgrades:- Direct Commercial Drives
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Filtration upgradesFiltration upgradesVacuum Filter Upgrades:- Direct Commercial Drives
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Filtration upgradesFiltration upgradesVacuum Filter Upgrades:- External pipe Design
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Filtration upgradesFiltration upgradesVacuum Filter Upgrades:- High Flow Valve
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FLOTATION UPGRADES
• Replacement of Agitair mechanisms• Upgrade to Dorr-Oliver Rotor/Stators• Upgrade to Dorr Oliver Rotor/Stators• Lower power consumption-• Improved recovery
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FLOTATION UPGRADES
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FLOTATION UPGRADES
Conventional Rotor/Stator mechanism suitable forfine/cleaning flotationfine/cleaning flotation.
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FLOTATION UPGRADES
Wemco UpgradesFlat hoodFlat hoodNarrow & Wide radial laundersBevel bottoms
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FLOTATION UPGRADESWemco flat hood Upgrades
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FLOTATION UPGRADES
Disperser and hood assemblyp y5 sector unreinforced polyurethane flat hood-19mm thick x 32% open areahood-19mm thick x 32% open area
Polyurethane disperser 68mm thick x 27% open 68mm thick x 27% open area with top ring reinforcement only
No exposed threads
6 off Ø15 “Drive in” barbed 6 off Ø15 Drive in barbed polyurethane pins/joint
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FLOTATION UPGRADES
Wide & Narrow Radial Launders and additional Froth Crowders
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REJUVENATINGREJUVENATING OLD EQUIPMENTOLD EQUIPMENT
Any Questions?
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