1
Introduction to Osborn Screens
S N E E R C S N R O B S O O T N O I T C U D O R T N I
Drive Types for Osborn Standard Screens Screen
Duty Range
Drive
Obex
Light to Medium
Out of Balance Motors
Horizontal and Inclined Superking
Medium to Heavy
Single Shaft & Vee Belts
Inclined Twin Shaft
Medium to Heavy
Eliptex Vibrator
Horizontal IFE
Light to Extra Heavy
Exciter Driven (Gearbox)
Horizontal and Inclined
2
Vibrating Screen Selection Guide Number Screen Type
Horizontal
Inclined
of Decks
(std)
Osborn Obex
single
Comments Y
Y
Sizing, Washing & Dewatering Screen
Osborn Superking
Single
N
Y
Double
N
Y
Triple
N
Y
4 -deck
N
Y
Osborn Linear
Single
Y
N
Double
Y
N
Triple
Y
N
Single
Y
Y
Exciter Driven ( Gearbox)
Double
Y
Y
Overhead
Single
Y
Osborn IFE
Single or double shaft mechanism through centre of side plate
Twin Shaft overhead drive
Dewatering Screen
Single
Y
Banana Screen
Double
Y
Banana Screen
Osborn IFE Trisomat
Single
N
Y
Specialist Screen
Osborn IFE
Single
Y
N
Underwater Screen
Osborn IFE
Single
Y
N
Foundry Shake Out Screen
Osborn
Single
N
Y
Heavy Duty Vibrating Grizzly Screen
3 - 5 Deck
N
Y
Sizing Equipment
Osborn Mogensen
Screen Bed Depth of Material To calculate the bed depth of material the following formula is used. The allowable depth of bed should not exceed 5 times the wire cloth opening when screening material weighing 1.6t/m³ or 4 times the wire cloth opening when screening material weighing 0.8t/m³
General Notes
Note:
• Bed depth calculations are recommended to determine the optimum width of the screen.
For a Horizontal Screen use an average travel speed of 820 metres per hour For an Inclined Screen use an average travel speed of 1820 metres per hour Actual metres/hour will vary depending on material, stroke, speed and slope
• If the bed depth is too deep, the material will not see the screen surface.
D = D = T = C = M= W=
Tx C MxW Bed Depth Tonnes per hour Bulk Density Speed of Travel Width of Screen
• Fine screening bed depth is very important particularly when washing to ensure sprayed water penetrates the full depth of material.
metres t/hr t/m³ m/hr metres
• The first 1/3 of the screen will allow 80% of the material to pass through. The balance is used to take the near size material to provide a 95% efficiency.
Example T = 250 tph C = 1.6 t/m³ ( aggregate) M = 820 m/hr W = 1.8m
• Sticky, Clay like material, UG 2, Gypsum require a high frequency linear horizontal to slightly inclined screen. The Osborn Obex Screen should be considered for light duty. For heavier duty, the Osborn IFE exciter drive would be the preferred screen. The width x length of the required screen is calculated using our computer programme and we recommend that you contact Osborn for assistance.
250 x 1.6 820 x 1.8 400 D= 1476 D= 0.2710 m D = 27.1 cm = 271mm D=
3
N E E R C S G N I T A R B I V
Osborn Obex Screen
N E E R C S X E B O N R O B S O
Osborn Obex Single Deck Screens Width x Length
Motor Type
Kw each motor
Screen mass (Kg) excl. motors
Screen mass (Kg) incl. motors
Standard Obex Screens with 2- off 4-pole motors 600 x 1200
SPV 6.7B
0.55
240
310
600 x 1500
SPV 10.0B
1
365
459
600 x 1800
SPV 15.0B
1.2
418
492
600 x 3000
SPV 25.0B
1.75
850
1000
Standard Obex Screens with 2-off 6-pole motors 900 x 1800
SPV 27.0C
2.1
640
810
900 x 2400
SPV 27.0C
2.1
920
1196
1200 x 2400
SPV 27.0C
2.1
1047
1349
1200 x 3600
SPV 50.0C
4
1725
2105
1500 x 3600
SPV 61.0C
5.3
2225
2721
1500 x 4200
SPV 61.0C
5.3
2420
2968
1500 x 4800
SPV 80.0C
7.6
3175
4007
NOTE: Please consult Osborn for other sizes. Double deck screens designed to specification
4
Osborn Superking Screen
OSBORN SUPERKING SCREENS Drive Type
Motor Kw
Max RPM
Screen total mass
5’ x 10’ ( 1500mm x 3050mm)
AW 11
11
880
2500
5’ x 12’ ( 1500mm x 3650mm)
AW 11
11
880
3400
5’ x 14’ ( 1500mm x 4265mm)
AW 13
15
880
3550
5’ x 16’ ( 1500mm x 4880mm)
AW 16
15
850
4750
6’ X 16’ ( 1830mm x 4880mm)
AW 16
18.5
850
5100
6’ X 20’ ( 1830mm x 6100mm)
AW 16
22
850
5750
7’ x 20’ ( 2135mm x 6100mm)
AW 16
30
830
7500
8’ x 20’ ( 2440mm x 6100mm)
AW 20
30
800
8350
2 X AW 16
2 X 15
800
9955
AW 20
30
800
8500
2 X AW 16
2 X 22
800
11135
Width x Length SINGLE DECK
8’ x 20’ Dual (2440mm x 6100mm ) 8’ x 22’ ( 2440mm x 6700mm) 8’ x 28’ Dual (2440mm x 8535mm)
DOUBLE DECK 5’ x 10’ ( 1500mm x 3050mm)
AW 11
11
880
3100
5’ x 12’ ( 1500mm x 3650mm)
AW 11
11
880
3650
5’ x 14’ ( 1500mm x 4265mm)
AW 13
15
880
4550
5’ x 16’ ( 1500mm x 4880mm)
AW 16
22
850
6100
6’ X 16’ ( 1830mm x 4880mm)
AW 16
22
830
6300
6’ X 20’ ( 1830mm x 6100mm)
AW 16
30
830
6750
6’ X 20’ ( 1830mm x 6100mm)
AW 16
30
830
6750
7’ x20’ ( 2135mm x 6100mm)
AW 16
37
830
9000
7’ x 20’ Dual (2135mm x 6100mm)
2 x AW 16
2 x 15
830
9930
7’ x 20’ HD ( 2135mm x 6100mm)
AW 20
37
800
9850
8’ X 20’ (2440mm x 6100mm)
AW 20
45
800
10100
8’ x 20’ Dual (2440mm x 6100mm )
2 x AW 16
2 x 22
800
11735
8’ x 24’ Dual (2400mm x 7300mm)
2 x AW 16
2 x 22
800
12435
8’ x 29’ Dual (2400mm x 9100mm)
2 x AW 16
2 x 22
800
10400
5’ x 10’ ( 1500mm x 3050mm)
AW 11
11
880
4200
5’ x 12’ ( 1500mm x 3650mm)
AW 13
15
880
4950
5’ x 14’ ( 1500mm x 4265mm)
AW 16
18.5
850
5700
5’ x 16’ ( 1500mm x 4880mm)
AW 16
30
850
7450
6’ X 16’ ( 1830mm x 4880mm)
AW 16
30
850
8200
6’ X 20’ ( 1830mm x 6100mm)
AW 16
30
830
8600
AW 16
37
830
11000
2 x AW 16
2 X 18.5
830
13385
AW 20
37
830
12000
2 X AW 16
2 X 22
800
12760
TRIPLE DECK
7’ x 20’ ( 2135mm x 6100mm) 7’ x 20’ Dual (2135mm x 6100mm) 7’ x 20’ HD (2135mmx6100mm) 8’ x 20’ Dual (2440mm x 6100mm ) 8’ x 22’ ( 2440mm x 6700mm) 8’ x 22’ Dual (2440mm x 6700mm )
AW 20
45
800
13350
2 X AW 16
2 X 22
800
15150
AW 20
37
830
9300
FOUR DECK 6’ X16’ (1830mm x 4880mm)
Drive Arrangement
The Osborn heavy duty SUPERKING Screens are frequently used in primary screening and scalping operations and have proved to be exceptionally reliable in the mining and quarrying industries. Generally operating at 19°20° installation angle the SUPERKING produces a maximum of 12mm stroke at around 5G’s. The SUPERKING has fully adjustable counterweights for optimum screening efficiency. Available in single, double, triple or 4 deck configurations these screens are equally efficient for screening dry or wet gravel, sand crushed stone and all types of ore. The drive is a self contained vibrator unit complete with a heavy duty steel shaft and fitted with grease lubricated self-aligning spherical roller bearings. The unit is completely enclosed and dust tight. To ensure that the feed material spreads across the full width of the screen deck the SUPERKING screens are fitted with screen boxes as standard. Other machines are supplied with a feed box arrangement as an option.
For sizes not listed here, please consult Osborn NOTE: Where 2x drive types are shown , this indicates a twin drive mechanism timed by a toothed belt for heavy duty applications
5
N E E R C S G N I K R E P U S N R O B S O
Osborn Linear Screen Osborn Linear Screens Vibrator Unit
5’ x12’ (1500mm x 3600mm)
11.5
LPVE 11
3090
5’ x14’ (1500mm x 4200mm)
11.5
LPVE 11
3280
5’ x16’ (1500mm x 4800mm)
11.5
LPVE 11
3650
6’ x16’ (1800mm x 4800mm)
15
LPVE 11
4200
SINGLE DECK
N E E R C S R A E N I L N R O B S O
Screen Mass
Motor Kw
Width x Length
Kg
7’ x 20’ (2100mm x 6100mm)
22
VE 13
6050
8’ x20 ‘ (2400mm x 6100mm)
30
VE 13
7500
8’ x24’ (2400mm x 7300mm)
30
VE 13
8900
DOUBLE DECK 5’ X 12’ (1500mm x 3600mm)
11.5
LPVE 11
3720
5’ x14’ (1500mm x 4200mm)
15
LPVE 11
4050
5’ x 16’ ( 1500mm x 4800mm)
15
LPVE 11
4500
6’ x16’ (1800mm x 4800mm)
15
LPVE 11
4600
7’ x20’ ( 2100mm x 6100mm)
22
VE 13
7100
8’ x 20’ ( 2400mm x 6100mm)
30
VE 13
8000
8’ x24’ (2400mm x 7300mm)
37
VE 13
9150
15
LPVE 11
4540
5’ x14’ (1500mm x 4200mm)
15
LPVE 11
4950
5’ x16’ (1500mm x 4800mm)
18.5
LPVE 11
5500
6’ x16’ (1800mm x 4800mm)
18.5
LPVE 11
5640
7’ x20’ ( 2100mm x 6100mm)
30
VE 13
8100
TRIPLE DECK 5’ x12’ (1500mm x 3600mm)
NOTE: Please consult Osborn for other sizes
VIBRATING SHAFTS Each tough, eccentric, vibrator shaft is precision-machined from 1045 steel for extra-long service.
WIDE-FACE HELICAL GEARS Timing gears are premium-quality, single helical design precision-cut from 4140 heat treated steel. Wide-faced gear teeth distribute load much more effectively than spur gears, promote, smooth, quiet, long-lived operation under heavy loading
OIL FLINGER
OIL-SPLASH LUBRICATION Through-flow, oil splash system provides superior lubrication of gears and bearings. Large oil reservoir, extending the entire length of vibrator housing, dissipates heat rapidly, lowers bearing temperatures for longer bearing service life
DOUBLE-LIP SEAL Retains oil and prevents contaminants from entering vibrator mechanism. Seals and seal sleeve are easily replaceable when worn.
6
Osborn IFE Linear Screen
Osborn IFE Banana Screen
7
N E E R C S A N A N A B E F I N R O B S O D N A R A E N I L E F I N R O B S O
Osborn IFE Trisomat Screen Trisomat Standard Sizes
N E E R C S T A M O S I R T E F I N R O B S O
WxL
C
D
E
Kg
Kw Drive
800 x 3600
2260
4690
1500
2200
5.5
800 x 4200
2445
5260
1500
2300
5.5
800 x 4800
2630
5830
1500
2400
7.5
1000 x 4200
2445
5260
1700
2550
7.5
1000 x 4800
2630
5830
1700
2700
7.5
1000 x 5400
2815
6400
1700
2850
11
1250 x 4800
2630
5830
1950
3000
11
1250 x 5400
2815
6400
1950
3200
11
1250 x 6000
3000
6970
1950
3400
15
1600 x 5400
2815
6400
2300
3600
15
1600 x 6000
3000
6970
2300
3800
15
2000 x 5400
2815
6400
2700
4000
15
2000 x 6000
3000
6970
2700
4200
18.5
Larger sizes on request Mass table is based on vi brated mass only without support structure
The Osborn IFE Trisomat Screens are especially designed for handling difficult materials. The “Flip-Flop” screening action prevents pegging and blinding even when screening damp sticky materials. The Trisomat exhibits alternate tensioning and relaxing of the screen mesh with a full circular motion at the feed end, which induces both vertical stratification and forward transportation in the feed producing rapid separation and removal of fines. In the center section of the screen deck, the “flip-flop” action occurs while at the discharge end, a reverse elliptical motion slows the reduced flow to encourage the separation of the near-size particles. Drive may be mounted on the right or left
Coal & Coke Plants, Composting Plants, Steelworks, Sand & Gravel Plants, Refuse Recovery Plants, Scrap Recovery Plants and in the Wood Industry etc, the Trisomat Screen is highly efficient and is available from 800mm wide by 3600mm long up to the King Size Trisomat at 3000mm wide x 9600mm long.
Dimensions in mm Weight: Only vibrated mass: without supporting structure
• • • • • •
Raw Coal Coke Fines Compost Sand & Gravel Wood Chips Steelworks Slag
Feed end The circular motion at the feed end assists in stratification of even the most difficult materials and conveying the feed material forward.
Central section A linear motion in the central section of the deck area ensures optimum contact between material and mesh thus improving screening efficiency.
8
Discharge end The reverse elliptical movement at the discharge end retards the material and maintains a bed depth ensuring efficient ‘near-size’ particle extraction.
Osborn IFE Foundry Shake Out Screens
Osborn Mogensen Sizer®
9
R E Z I S N E S N E G O M N R O B S O D N A N E E R C S T U O E K A H S Y R D N U O F E F I N R O B S O
Osborn Mogensen Spreader Feeder
R E D E E F R E D A E R P S N E S N E G O M N R O B S O
10
Screening Options Screen Media • • • •
Screen Mountings
Wire Deck Poly Deck Punched Plate Deck with Runners Rubber
• Spring mount • “Rosta” type mount • Rubber mount (Air Ride)
Screen Drivers
Screen Installations
• Cardon Shaft Drive • Vee Belt Drive
• Suspension type • Floor Mounted type
Screening Terminology The following terms are some of those typically used in mechanical screening. Amplitude A measurement of the screen cloth as it vertically peaks to its tallest height and troughs to its lowest point. Measured in multiples of the acceleration constant g (g-force). Blinding When material plugs into the open slots of the screen cloth
Stratification This phenomenon occurs as vibration is passed through the bed of material causing the larger material to rise and the finer material to descend within the bed. Scalping Refers to the removal of the larger size particles from the incoming material. G-Force Refers to the force of acceleration on the screen.
Screen Media Material defined by mesh size. It can be made from stainless steel, polyurethane, rubber or punched steel plate. Deck A frame that holds the screen cloth in place. Can be multiple decks. Frequency Measured in Hertz (Hz) or revolutions per minute (RPM) and is the number of times that the screen cloth peaks and troughs within a second. Gradation Material grading. Also referred to as the cut. Given a feed material in an initial state, the material can be defined to have a particle size distribution. Grading is removing the maximum and minimum material sizes by way of mesh selection.
11
Y G O L O N I M R E T & S N O I T P O G N I N E E R C S
Application Data Sheet - Osborn Vibrating Screen N E E R C S G N I T A R B I V N R O B S O T E E H S A T A D N O I T A C I L P P A
Osborn Engineered Products SA (PTY) LTD Customer
Contact Person
Phone No.
Phone No.
Fax.No.
Date.
Enq.No:
TYPE OF MATERIAL DRY BULK DENSITY t/m³ SPECIFIC GRAVITY MAX FEED SIZE (mm) MOISTURE CONTENT % CAPACITY tph PARTICLE SIZE
Particle
FLOWABILITY
DUTY
% Passing
Good
Fair
Poor
Feeding
Washing
Screening
Dewatering DECK PREPARATION APPLICABLE
PRODUCTS REQ’D
Deck
Cut Size
Poly
Wire
Rubber
Top Second Third Fourth Questions If wet screening, how much water is available and at what pressure ? How is the Screen to be fed ? (a) by a conveyor (b) by a vibrating feeder Is the feed to the screen constant ? Is there a recycling load ? Comments
Head Office: PO Box 8182 Elandsfontein 1406 Johannesburg South Africa Tel: +27 11 820 7600 Fax: +27 11 388 1136 E-mail:
[email protected] www.osborn.co.za
Ref No. VS/09/Re v 1
Osborn, Designers and Manufacturers of Bulk Materials Handling Equipment and Minerals Processing Plant and Equipment
12