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Introduction to Osborn Screens

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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

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Vibrating Screen Selection Guide Number Horizontal Inclined

Screen Type of Decks Comments (std)

Osborn Obex single Y Y Sizing, Washing & Dewatering

Screen

Osborn Superking Single N Y Single or double shaft mechanism through centre of side plate Double N Y

Triple N Y

4 -deck N Y

Osborn Linear Single Y N Twin Shaft overhead drive

Double Y N

Triple Y N

Osborn IFE Single Y Y Exciter Driven ( Gearbox)

Double Y Y Overhead

Single Y 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

Osborn Mogensen 3 - 5 Deck N Y Sizing Equipment

General Notes • Bed depth calculations are recommended to

determine the optimum width of the screen.

• If the bed depth is too deep, the material will not see the screen surface.

• Fine screening bed depth is very important particularly when washing to ensure sprayed water penetrates the full depth of material.

• 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.

• 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.

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

D =

D =T =C =M = W =

T x CM x W

Bed Depth Tonnes per hourBulk Density Speed of TravelWidth of Screen

metrest/hrt/m³m/hr

metres

ExampleT = 250 tphC = 1.6 t/m³ ( aggregate)M = 820 m/hrW = 1.8m

250 x 1.6820 x 1.8

4001476

0.2710 m27.1 cm = 271mm

D =

D =

D = D =

Note:

For a Horizontal Screen use an average travel speed of 820 metres per hourFor an Inclined Screen use an average travel speed of 1820 metres per hourActual metres/hour will vary depending on material, stroke, speed and slope

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Osborn Obex Screen

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Osborn Obex Single Deck Screens

Width x Length Motor Type Kw each

motorScreen mass (Kg)

excl. motorsScreen mass (Kg)

incl. motors

Standard Obex Screens with 2- off 4-pole motors600 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

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Osborn Superking Screen

OSBORN SUPERKING SCREENS

Width x Length Drive Type Motor

KwMax RPM

Screen total mass

SINGLE DECK

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

8’ x 20’ Dual (2440mm x 6100mm ) 2 X AW 16 2 X 15 800 9955

8’ x 22’ ( 2440mm x 6700mm) AW 20 30 800 8500

8’ x 28’ Dual (2440mm x 8535mm) 2 X AW 16 2 X 22 800 11135

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

TRIPLE DECK

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

7’ x 20’ ( 2135mm x 6100mm) AW 16 37 830 11000

7’ x 20’ Dual (2135mm x 6100mm) 2 x AW 16 2 X 18.5 830 13385

7’ x 20’ HD (2135mmx6100mm) AW 20 37 830 12000

8’ x 20’ Dual (2440mm x 6100mm ) 2 X AW 16 2 X 22 800 12760

8’ x 22’ ( 2440mm x 6700mm) AW 20 45 800 13350

8’ x 22’ Dual (2440mm x 6700mm ) 2 X AW 16 2 X 22 800 15150

FOUR DECK

6’ X16’ (1830mm x 4880mm) AW 20 37 830 9300

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

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 enclosedand 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.

Drive Arrangement

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Osborn Linear Screen

Osborn Linear Screens

MotorKw

VibratorUnit

ScreenMass

KgWidth x Length SINGLE DECK

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

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

TRIPLE DECK

5’ x12’ (1500mm x 3600mm) 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 NOTE:

Please consult Osborn for other sizes

VIBRATING SHAFTSEach tough, eccentric, vibrator shaft is precision-machined from

1045 steel for extra-long service.

OIL FLINGER

WIDE-FACE HELICAL GEARSTiming 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-SPLASH LUBRICATIONThrough-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 SEALRetains oil and prevents contaminants from

entering vibrator mechanism. Seals and seal sleeve are easily replaceable when worn.

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Osborn IFE Linear Screen

Osborn IFE Banana Screen

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Osborn IFE Trisomat Screen

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. 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.

Trisomat Standard Sizes

W x L 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 vibrated mass only without support structure

• Raw Coal• Coke Fines• Compost• Sand & Gravel• Wood Chips• Steelworks Slag

Feed endThe circular motion at the feed end assists in stratification of even the most difficult materials and conveying the feed material forward.

Central sectionA linear motion in the central section of the deck area ensures optimum contact between material and mesh thus improving screening efficiency.

Discharge endThe reverse elliptical movement at the discharge end retards the material and maintains a bed depth ensuring efficient ‘near-size’ particle extraction.

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Drive may be mounted on the right or left

Dimensions in mm

Weight: Only vibrated mass: without supporting structure

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Osborn IFE Foundry Shake Out Screens

Osborn Mogensen Sizer®

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Screening Options

Screen Media

• Wire Deck• Poly Deck• Punched Plate Deck with Runners• Rubber

Screen Mountings

• Spring mount• “Rosta” type mount• Rubber mount (Air Ride)

Screen Drivers

• Cardon Shaft Drive• Vee Belt Drive

Screen Installations

• Suspension type• Floor Mounted type

Screening TerminologyThe following terms are some of those typically used in mechanical screening.

AmplitudeA 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).

BlindingWhen material plugs into the open slots of the screen cloth

Screen MediaMaterial defined by mesh size. It can be made from stainless steel, polyurethane, rubber or punched steel plate.

DeckA frame that holds the screen cloth in place. Can be multiple decks.

FrequencyMeasured in Hertz (Hz) or revolutions per minute (RPM) and is the number of times that the screen cloth peaks and troughs within a second.

GradationMaterial 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.

StratificationThis 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.

ScalpingRefers to the removal of the larger size particles from the incoming material.

G-ForceRefers to the force of acceleration on the screen.

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Application Data Sheet - Osborn Vibrating Screen

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Ref No. VS/09/Rev 1Osborn, Designers and Manufacturers of Bulk Materials Handling Equipment and Minerals Processing Plant and Equipment

Head Office:PO Box 8182Elandsfontein

1406Johannesburg

South Africa Tel: +27 11 820 7600 Fax: +27 11 388 1136

E-mail: osborn@osborn.co.za www.osborn.co.za

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 % Passing

FLOWABILITY Good Fair Poor

DUTY Feeding Washing Screening Dewatering

DECK PREPARATION

APPLICABLE

PRODUCTS REQ’D Deck Cut Size Poly Wire Rubber

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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 ?

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