sandvik rock processing...sandvik rock processing the art of crushing. quarry academy 2005 feed...
TRANSCRIPT
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Quarry Academy 2005
SANDVIK ROCK PROCESSING
THE ART OF CRUSHING
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Quarry Academy 2005
Feed
MachinesMachines&&
ProcessesProcesses
Products
What is a C&S system ?
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Quarry Academy 2005
Super Quarries & Mines 600-2000 tphMedium Quarries 300-600 tphSmall Quarries & Mobiles 150-300 tph
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Quarry Academy 2005
THE ART OF CRUSHING
Raw material?How big? (Size of rawmaterial)How much? (Capacity)Final products?Contamination?
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Quarry Academy 2005
THE ART OF CRUSHING
FeedcurvesMax TopsizeImpact Work index (Wi)Abrasion index (Ai)Type of rock / geologyDensity
– Wi measured x B.D./1.6 = Wi realMoistureContamination
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Quarry Academy 2005
THE ART OF CRUSHINGCrushing Rock
Limited reduction
Cubical shape
Over- and undersize is important
Flexibility
Crushing and screening
Range of products
Sellable Products !
Crushing Gravel
Limited reduction
Cubical shape
Over- and undersize is important
Flexibility
More screening than Crushing
Contamination?
Range of products
Sellable Products !
Crushing Ore
Maximum reduction
Shape of no importance
Over- and undersize of no importance
Flexibility of minor importance
More crushing -less screening
One or two products
Product to further processing !
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Quarry Academy 2005
THE ART OF CRUSHING
Final Products - Specifications
Asphalt / ConcreteShape of materialOver and undersizeNo contamination
Railway ballastCurve limitationsShape of materialOver and undersizeNo contaminations
Base course / Sub baseCurve limitations
Different in all countries
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Quarry Academy 2005
Product properties
NORMSBritish norms
Slots
L
L3German norms
“US” norms
French norms
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Quarry Academy 2005
Reduction Ratio (1)
F80 = (80 % of feed mtrl) P80 = (80 % of the product)
80
80
PF
=Reduction Ratio
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Quarry Academy 2005
0102030405060708090
100
1 10 100 1000
HSIH-ConeS-ConeJawFeed
Reduction Ratio (2)Normal reduction:
Jaw crusher 2-3Gyratory crusher 3-4Cone crusher 3-5Impact crusher (VSI) 4-6Impact crusher (HSI) 7-10
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Quarry Academy 2005
Reduction Ratio (3)
P80 Feed: 400 mmP80 Products: 16 mm
Min. required plant reduction ratio:
2-stage Impact Plant:
10x7=70OK, Only for Ai
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Quarry Academy 2005
Reduction Ratio 3Impactors VS Compresive crushers
Impact crusher High reduction ratioLow investmentHigh wear costMax Ai= 0.15
Jaw / Cone crusherLow reduction ratioBig investmentLow wear cost
Production (tons)
Tota
l cos
t(In
vest
men
t + W
ear)
Jaw / C
one cru
sher
Impa
ct c
rush
er
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Quarry Academy 2005
Primary Crusher station
Continuous processConveyable productRemove Contaminations
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Quarry Academy 2005
Primary Crusher station
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Quarry Academy 2005
Primary Crusher station
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Quarry Academy 2005
Primary Crusher station
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Quarry Academy 2005
Intermediate storage
Quality producing part of plant independent of Primary crushing and loading operation
Even out variations in the material distribution. Uneven load gives problems in all machines coming after.
Better total availability for the Plant
Recommended stockpile volume for 2 shifts operation
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Quarry Academy 2005
Intermediate Storage (2)
1 feeder
2 feeders
3 feeders
4 feeders
1 feeder
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Secondary Circuit
Big feed opening
High capacity
Controlled feed
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Quarry Academy 2005
Secondary Crushers
Hydrocone H / S Secondary Impactor
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Quarry Academy 2005
Production of railway ballast
C.S.S: 150-175 mm
HydroconeS4800 C
HydroconeH6800 CXD
Alt.
0-18 0-35 flakesRailwayBallast
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Quarry Academy 2005
ScreeningOpen / Closed circuit
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Quarry Academy 2005
Open Circuit
Screening ahead of a crusher avoids packing.Less wear in the crusher.Higher total capacity.The product is controlled by the screening cloth and the setting of the crusher.
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Quarry Academy 2005
Open Circuit – Examples
Splitting of crusher feed
By-passing fine material
Scalping
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Quarry Academy 2005
Closed Circuit
Calibrated productHigher reduction ratio.Better cubical shapeMore machinesLower capacity
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Quarry Academy 2005
Closed Circuit
Closed circuit ~ 1/5 of screen feed circulating recommendedSmaller or same setting (CSS) as separation.Higher wearCubical shapeBig screen
discrepancy:– Short jobs– Prod of sand
4/5
1/5
4/5
5/5
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Quarry Academy 2005
Closed Circuit – Examples
Screening after crusher
Screening ahead of crusher
Screening ahead of and after crusher
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Quarry Academy 2005
A
B
C
D
Screen dutiesA = Scalping screeningB = Close circuit screeningC = Final products screeningD = Natural fines screening
SCREENNING SUMMARY
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Quarry Academy 2005
Final Crusher
Demands:
Optimised feed
Capacity
Product shape
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Quarry Academy 2005
FINAL CRUSHER - Hydrocone
Good FlexibilityHigher crushing forcesLimited good shape rangeUniform reduction ratio
0
10
20
30
40
50
60
70
80
90
100
0,1 1 10 100Aperture (mm)
%-P
assi
ng
FeedH3800 F
Good shape product area
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Quarry Academy 2005
FINAL CRUSHER- Merlin VSI
Better shapeUneven ReductionLimited topsize capacityHigh fines production
0
10
20
30
40
50
60
70
80
90
100
0,1 1 10 100Aperture (mm)
%-P
assi
ng
FeedRP108
Good shape product area
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Quarry Academy 2005
HYDROCONE – MERLIN RP
Curves show Hydrocone H3800 F and Merlin RP 107 in a medium hard granite (Wi=16) in open circuit operation
0
10
20
30
40
50
60
70
80
90
100
0,1 1 10 100Aperture (mm)
%-P
assi
ng
FeedH3800 FRP108
Hydrocone H3800 F
Ecc: 29 mmC.S.S: 16 mmASR Plus
Merlin RP 107Tip speed: 60 m/sBi-flow: 0 %150 kW
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Storage at Crusher
Choke fed Crusher;Higher ReductionBetter shape (cubical)Better utilization of mantle and linersBin volume; 5-10 min operation
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Quarry Academy 2005
Crusher feed
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Quarry Academy 2005
Process Control
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Quarry Academy 2005
Stationary / MobileStationary
Long term ContractsValuable productsRange of productsProduction on demandFlexibility with manystagesHigh Production control
MobileContract crushingCrushing at constructionsiteLow product demandsFew productsFlexibility with Fleet
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Quarry Academy 2005
Mobile Units (1)
Portable Track-mountedWheel-mounted
1 5 25 100Movements/Year
Mobility selection chart
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Mobile Units (2)
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Quarry Academy 2005
Mobile Units (3)
Portable
Track-mounted
Wheel-mounted
1 10 50
Hours
Dismounting time
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Quarry Academy 2005
Mobile Units (4)
10 30 40 5020
100
150
200
250
300
60
Machine Weight (Tonnes)
Nom. loading Capacity (m³/h)
Wheel LoaderExcavator
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Quarry Academy 2005
2-Stage Plant ApplicationExampleCapacity:200 tph
Feed station
JawmasterJM 1108 HD
Bin withFeederHydrocone
H-4800 EC
ScreenCS 86-IV
0-4 4-8 8-16 16-32
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Quarry Academy 2005
3-Stage Plant ApplicationExampleCapacity: 200 tph
Feed station
JawmasterJM 1108 HD
Bin withFeederHydrocone
S-3800 EC
ScreenCS 86-II
0-4 4-8 8-16 16-32
HydroconeH-3800 M
ScreenCS 86-II
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Quarry Academy 2005
4-Stage Plant, Cone ApplicationExampleCapacity: 200 tph
Feed station
JawmasterJM 1108 HD
Bin withFeeder
HydroconeS-3800 EC
ScreenCS 86-II
HydroconeH-3800 M
ScreenCS 86-II
HydroconeH-3800 MF
16-32 8-16 4-8 0-4
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Quarry Academy 2005
4-Stage Plant, VSI ApplicationExampleCapacity: 200 tph
Feed station
JawmasterJM 1108 HD
Bin withFeeder
HydroconeS-3800 EC
ScreenCS 126-II
HydroconeH-3800 M
VSI
16-32 8-16 4-8 0-4
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Quarry Academy 2005
Application examplesSUMMARY
Product distributionProduct 0-4 mm 4-8 mm 8-16 mm 16-32 mm2-stage 33 t/h 19 t/h 41 t/h 107 t/h (*)3-stage 43 t/h 29 t/h 66 t/h (*) 62 t/h *4-stage 61 t/h 35 t/h * 54 t/h * 50 t/h *4-stage, VSI 88 t/h 38 t/h * 44 t/h * 30 t/h *
* Good shape
2-stageCheapEasy to moveBad shapeLow flexibility
3-stageMedium expensiveCould be movedMedium shapeGood flexibility
4-stageExpensiveDifficult to moveVery good shapeVery good flexibility
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Quarry Academy 2005
Mining Plant ApplicationExample
EFCEFC
JawmasterJM 1312 HD
HydroconeS-4800 C
2x HydroconeH-4800 EF
0-10
HydroconeH-4800 M
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Quarry Academy 2005
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Quarry Academy 2005