Vibrating Screens
Introduction to Osborn Screens Osborn has the largest range of mining screens available in the market. Osborn’s experience in screen design and manufacture goes back to the 1940’s. During this time Osborn has continuously improved and developed their screen range to suit all the demanding conditions of the mining and quarrying industries. All vibrating screens are designed and manufactured in South Africa at Osborn’s modern facilities in Elandsfontein. Osborn utilises the latest design technology combined with FEA design analysis. VIBRATING SCREEN SELECTION GUIDE Number of Decks (std)
Horizontal
Inclined
Osborn OBEX Horizontal and up to 10° Incline or Decline
Single Double
Y Y
Y Y
Sizing, washing and dewatering, media recovery and scalping
Light to Medium
Out of balance Motors Linear motion
Osborn Superking declined
Single Double Triple 4-deck
N N N N
Y Y Y Y
Aggregate
Medium to Heavy
Single or Dual Shaft and Vee belts Circular Motion
Osborn Linear Horizontal and up to 5° Decline
Single Double Triple
Y Y Y
N N N
Sizing, Washing and Dewatering media recovery and scalping
Medium to Heavy
Osborn Exciter Driven Horizontal, Inclined and Multislope
Single Double
Y Y
Y Y
Sizing, Washing and Dewatering Screen, media recovery and scalping
Medium to Extra Heavy
Exciter Driven (Gearbox) Linear Motion
Screen type
Multislope - 2 to 5 slopes
Comments
Duty Range
Drive Type
Twin Shaft Overhead Drive Elliptical Motion
Osborn Mogensen
3-5 Deck
N
Y
Accurate Sizing
Light duty
Out of Balance Motors Linear Motion
Osborn Vibrating Grizzly
Single
N
Y
HD Vibrating Grizzly Screen Scalping
Heavy to Extra Heavy
Exciter Driven (Gearbox) Linear Motion
“G” forces are very important in screen selection 5 G’s is considered the norm in South Africa. The bigger the screen aperture the higher the machine stroke. Thus the speed will decrease. On fine apertures high speed with a small stroke is required. “G” force is calculated as stroke multiplied by speed.
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Osborn OBEX Screens Screens can be installed up to 10° incline or decline Width x Length
Width x Length
1’ x 4’ (305 mm x 1220 mm)
5’ x 10’ (1525 mm x 3050 mm) 5’ x 12’ (1525 mm x 3660 mm)
2’ x 4’ (610 mm x 1220 mm)
5’ x 14’ (1525 mm x 4270 mm}
OBEX Screens can be powered by 4 pole or 6 pole motors in various Voltages.
6’ x 12’ (1830 mm x 3660 mm)
All OBEX Screens operate with two out of balance motors.
2’ x 6’ (610 mm x 1830 mm) 2’ x 8’ (610 mm x 2440 mm)
All OBEX screens are available in Single and Double Deck configuration.
6’ x 14’ (1830 mm x 4270 mm) 3’ x 5’ (915 mm x 1525 mm)
6’ x 16’ (1830 mm x 4880 mm)
3’ x 6’ (915 mm x 1830 mm)
6’ x 18’ (1830 mm x 5490 mm)
Osborn can also design and manufacture specific sizes for specific applications.
3’ x 8’ (915 mm x 2440 mm) 3’ x 10’ (915 mm x 3050 mm)
7’ x 14’ (2135 mm x 4270 mm) 7’ x 16’ (2135 mm x 4880 mm)
4’ x 8’ (1220 mm x 2440 mm) 4’ x 10’ (1220 mm x 3050 mm)
8’ x 16’ (2440 mm x 4880 mm)
4’ x 12’ (1220 mm x 3660 mm)
The Osborn OBEX screen was developed as a replacement for the older shaft driven series. The main features are lower power consumption, low operating noise and easy maintenance. OBEX screens can be used for conventional screening, dewatering and washing applications. Osborn’s OBEX screens are supplied with polyurethane screen panel decks as a standard, but can be fitted with woven wire decks if required. Two vibrating out of balance motors rotate in opposite directions, synchronising and imparting a vibrating force in a longitudinal direction. This lifts the material and carries it forward on each rotation providing a partical travel rate. The amplitude can be varied by adjusting the out of balance weights on the vibrating motors to the required stroke. The frequency depends on the use of either 4 pole or 6 pole motors as dictated by the application. When dewatering on a 5° upslope, the use of a variable speed drive VSD is recommended to achieve optimal speed and performance.
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Osborn SUPERKING Screen Width x Length
Width x Length
SINGLE DECK
TRIPLE DECK
3’ x 10’ (915 mm x 3050)
4’ x 10’ (1220 mm x 3050 mm)
4’ x 10’ (1220 mm x 3050 mm)
5’ x 10’ (1525 mm x 3050 mm)
5’ x 10’ (1525 mm x 3050 mm)
5’ x 12’ (1525 mm x 3660 mm)
5’ x 12’ (1525 mm x 3660 mm)
5’ x 14’ (1525 mm x 4270 mm)
5’ x 14’ (1525 mm x 4270 mm)
5’ x 16’ (1525 mm x 4880 mm)
5’ x 16’ (1525 mm x 4880 mm)
6’ x 16’ (1830 mm x 4880 mm)
6’ x 16’ (1830 mm x 4880 mm)
6’ x 20’ (1830 mm x 6100 mm)
6’ x 20’ (1830 mm x 6100 mm)
7’ x 20’ (2135 mm x 6100 mm)
7’ x 20’ (2135 mm x 6100 mm)
7’ x 20’ (2135 mm x 6100 mm) Dual Drive
8’ x 20’ (2440 mm x 6100 mm)
8’ x 20’ (2440mm x 6100 mm) Dual Drive
8’ x 22’ (2440 mm x 6710 mm)
8’ x 22’ (2440mm x 6710 mm) Dual Drive
DOUBLE DECK 5’ x 10’ (1525 mm x 3050 mm)
FOUR DECK 6’ x 16’ (1830 mm x 4880 mm)
5’ x 12’ (1525 mm x 3660 mm) 5’ x 14’ (1525 mm x 4270 mm)
The Osborn 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 16° to 20° installation angle, the SUPERKING produces a maximum of 12 mm stroke at around 5G’s.
5’ x 16’ (1525 mm x 4880 mm)
The SUPERKING has fully adjustable counterweights for optimum screening and efficiency.
6’ x 16’ (1830 mm x 4880 mm) 6’ x 20’ (1830 mm x 6100 mm) 7’ x 20’ (2135 mm x 6100 mm)
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.
7’ x 20’ (2135 mm x 6100 mm) Dual Drive 7’ x 20’ (2135 mm x 6100 mm) Heavy Duty 8’ x 20’ (2440 mm x 6100 mm) 8’ x 20’ (2440 mm x 6100 mm) Dual Drive 8’ x 24’ (2440 mm x 7320 mm) Dual Drive 8’ x 29’ (2440 mm x 8845 mm) Dual Drive
NOTES For sizes not listed here please consult Osborn. Where dual (2 drives) are shown it indicates a twin drive mechanism timed by a toothed belt for heavy duty applications.
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 feed boxes as standard. The Osborn SUPERKING screens are supplied with woven wire screen decks as a standard but can be fitted with polyurethane screen panels if required.
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Osborn Exciter Driven Screens This linear motion screen is generally regarded as a high speed, OSBORN EXCITER DRIVEN SCREENS
high volume screen, superior in screening efficiency and capacity versus the more conventional horizontal and declined models. It
Width x Length
is available in single deck & double deck configuration.
8’ x 18’ (2440 mm x 5490 mm)
The unbalanced Exciter Drive, designed and manufactured in
10’ x 18’ (3050 mm x 5490 mm)
SA, consists of a sturdy soundproof housing which contains two
10’ x 20’ (3050 mm x 6100 mm)
shafts that are synchronised with gears and mounted in heavy
10’ x 22’ (3050 mm x 6710 mm)
duty roller bearings. Lubrication of the bearings and gears is
12’ x 24’ (3660 mm x 7320 mm)
achieved by a combination of an oil bath and an oil mist.
12’ x 26’ (3660 mm x 7930 mm)
Eccentric weights are attached to both ends of the shaft. While
12’ x 30’ (3660 mm x 9150 mm)
stationary, the unbalanced mass can be changed by adding or These screens can be installed up to an angle of 20°
removing weights. This alters the strength of the unbalanced exciter drive force and the oscillation amplitude of the vibratory equipment.
OSBORN EXCITER DRIVEN MULTI SLOPE TYPE SCREENS
The Multi Slope Type Screen with the Exciter Drive is made up
Width x Length
of two, three or five decks that are installed at different angles.
8’ x 18’ (2440 mm x 5490 mm)
The Exciter Drive gearbox is mounted over the top of the screen
10’ x 18’ (3050 mm x 5490 mm)
which imparts a straight linear motion through the screen
10’ x 22’ (3050 mm x 6710 mm)
arrangement.
12’ x 24’ (3660 mm x 7320 mm)
Used extensively in the coal and diamond processing industry,
12’ x 26’ (3660 mm x 7930 mm)
the Osborn Multi Slope Type Screen has the capability of handling
12’ x 30’ (3660 mm x 9150 mm)
wet and sticky materials. This is due to the aperature sizes changing over the full screen length by virtue of the different deck
Osborn Exciter Driven Multi Slope screens can be built with deck configurations in 2, 3 and 5 slopes.
angles and particle approach angles.
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Osborn Linear Screens Where accurate and efficient screening is required, the Osborn Linear
Width x Length
Screen is generally the equipment of choice. Capable of screening large capacities of material, this medium to heavy duty screen operates with
Width x Length
SINGLE DECK
TRIPLE DECK
an elliptical throw but still produces a maximum force of 5 G’s. 5’ x 12’ (1525 mm x 3660 mm)
5’ x 12’ (1525 mm x 3660 mm)
Operating with a three way motion (horizontal, vertical and elliptical),
5’ x 14’ (1525 mm x 4270 mm)
5’ x 14’ (1525 mm x 4270 mm)
this unique movement quickly stratifies and turns materials so that all
5’ x 16’ (1525 mm x 4880 mm)
5’ x 16’ (1525 mm x 4880 mm)
6’ x 16’ (1830 mm x 4880 mm)
6’ x 16’ (1830 mm x 4880 mm)
7’ x 20’ (2135 mm x 6100 mm)
7’ x 20’ (2135 mm x 6100 mm)
sides of each particle are exposed to deck openings and where fitted, water spray nozzles. The result is more complete screening, accurate sizing and more thorough dewatering. The heart of the Osborn Linear
8’ x 20’ (2440 mm x 6100 mm)
Screen is the Vibrator mechanism.
8’ x 24’ (2440 mm x 7320 mm)
Twin shafts, driven through wide face helical gears, are completely enclosed in a dust proof housing which contains a large oil reservoir to
DOUBLE DECK
provide splash lubrication to the gears and bearings. The oil assists in dissipating heat and lowers bearing temperatures for longer bearing
5’ x 10’ (1525 mm x 3050 mm)
service life.
5’ x 12’ (1525 mm x 3660 mm) 5’ x 14’ (1525 mm x 4270 mm)
The single shaft extension vibrator can be turned end for end (and gears retimed) to change the hand orientation of the drive, because
6’ x 16’ (1525 mm x 4880 mm)
the short vibrator side plates are symmetrical. Therefore, one vibrator
7’ x 20’ (2135 mm x 6100 mm)
for left hand and right hand drive.
8’ x 20’ (2440 mm x 6100 mm) 8’ x 24’ (2440 mm x 7320 mm)
NOTE Please consult Osborn for other sizes
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, and promote smooth, quiet, long-lived operation under heavy loading. VIBRATING SHAFTS Each tough, eccentric, vibrator shaft is precision-machined from 1045 steel for extra-long service.
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, and 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.
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Osborn Mogensen Sizer ® The Osborn Mogensen Sizer® is made up of several screening decks which are arranged on top of one another and have different inclinations. The meshes are bigger in the upper decks and smaller in the lower decks. The maintenance-friendly screen mesh is excited in a compact case by out of balance motor vibrators. While the finer particles of the material fall through the larger meshes of the upper deck almost vertically, the larger particles are filtered out of the material flow. Due to the different inclinations of the screen media, their openings have the effect of a smaller aperture. For this reason, the mesh widths can be unusually large compared to conventional flat-screens at the same separation efficiency. The separation of different particle sizes from the material flow and the larger mesh width not only prevent the deposition of material layers and clogging of material on the screen surface, but also ensure a high throughput. The sizer is fully dust enclosed with a sealed outlet and inlet.
MOGENSEN SCREEN SIZES Models
Width
No. of Decks
Motor
055
1.6 ‘ (500 mm)
5
2 Pole
103
3.2 ‘ (1000 mm)
3
4 Pole
105
3.2 ‘ (1000 mm)
5
4 Pole
155
5 ‘ (15000 mm)
5
6 Pole
203
6.5 ‘ (2000 mm)
3
4/6 Pole
205
6.5 ‘ (2000 mm)
5
4/6 Pole
Osborn Spreader Feeder Designed to accept a fast material flow from a relatively narrow feed and convert this into a low velocity and uniform flow across the width of the machine. The Osborn Spreader Feeder is highly recommended for this process. These feeders are capable of handling a wide range of products including materials such as damp clay and limestone; and are ruggedly built for arduous trouble free service. There are two types of Osborn spreader feeders. These are:
TRANSVERSE FEEDER The transverse feeder is available in four sizes being suitable for feeding the 1.0, 1.5, 2.0 and 3 meter wide sizers and screens. They are suitable for accepting a feed and turning through 90 degrees into a steady and continuous flow across the width of the screen feed plate. Occasionally they can be supplied to feed two machines mounted in parallel.
CENTRAL FEEDER The central feeder again is available in four sizes suitable for feeding the 1.0, 1.5, 2.0 and 3 meter wide sizers and screens. They accept a central feed and spread the material sideways in two directions across the width of the screen feed plate.
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Application Data Customer
Contact Person
Tel No.
Email
Cell No.
Date
Enq.No:
TYPE OF MATERIAL
MAX FEED SIZE (mm)
DRY BULK DENSITY t/m³
CAPACITY tph
MOISTURE CONTENT %
FLOWABILITY
APPLICATION
Light Duty
Medium Duty
PARTICLE DISTRIBUTION
Particle
% Passing
DECK PREPARATION
Deck Top Second Third Fourth
Cut Size
Heavy Duty
X-Heavy
Poly
Wire
Good
Fair
Poor
Rubber
If wet screening, how much water is available and at what pressure? HOW IS THE SCREEN BEING FED? YES
NO
Conveyor Vibrating Feeder Is the material feed constant ? Feedbox COMMENTS/ NOTES
PO Box 8182 Elandsfontein,1406 Johannesburg South Africa
Tel: +27 11 820 7600 Fax: +27 11 388 1136 Call Centre: 0861 OSBORN E-mail:
[email protected]
www.osborn.co.za
All rights reserved. Unless otherwise indicated, all materials on these pages are copyrighted by OSBORN. No part of these pages, either text or image may be used for any purpose other than personal use. Therefore, reproduction, modification, storage in a retrieval system or retransmission, in any form or by any means, electronic, mechanical or otherwise, for reasons other than personal use, is strictly prohibited without prior written permission.
Companies of the Astec Aggregate and Mining Group
www.osborn.co.za
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www.rockbreaker.com
www.astrcmobilescreens.com
www.kpijci.com
Vibrating Screen/0612/Rev1
Head Office: 57 Jansen Road, Elandsfontein
