Star Trace Pvt Ltd

Dewatering Screens

Whilst enjoying immense popularity for many years on small horizontal and inclined screens, STAR TRACE is the first company in the world to perfect this simple drive arrangement on large horizontal and inclined vibrating screens. This single development vibratory screen has resulted in tremendous advantages like reduced maintenance, compactness and simplicity are concerned. Besides the simplicity of the drive, many other features have been incorporated to provide vibratory machine which is specifically designed for heavy duty applications, long life, and low operating and maintenance costs, at a competitive price. The standard range of screens is presented later in the brochure, and these are normally available on short delivery.


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DEWATERING OPERATION :

During material dewatering, water is filtered through the mesh as a result of vibration while the material is conveyed toward the point of discharge. The filtered water carries solid particles whose size is slightly smaller than the mesh openings, which must be recovered by means of hydrocycloning and incorporated to final product in the discharge area. The level of moisture that can be obtained in the end product is between 10% and 15%, depending on its nature, particle size distribution and water content in the feed materials.

When the two vibrating motor that installed vertically on the sieve relatively rotate, the eccentric block of two vibrating motors produce rated excitation force. The horizontal excitation force cancel each other out, the vertical excitation force is transported to the whole screen surface through the body mass vibration. Materials do the jumping movement on the screens surface to the outlet because of the vertical excitation force. Materials which are smaller than the mesh drop into the lower layer and discharge from the outlet after doing the jumping movement caused by the vibrating motor. Because of the reasonable screens, after vibrating screens, we can get materials of different concentration particle sizes and done the rating work of materials.

DEWATERING CONSTRUCTION :
Dewatering Screen:

Screen, formed by modular polyurethane or stainless steel panels. The special design of these panels, with trapezial cross section mesh openings, together with their elasticity, revent obstruction and blocking. The result is a larger effective filtering area than in other types of mesh. Thanks to the modular design, the position of the mesh in the panel can be changed to ensure a regular wear of each panel.

Vibratory Motor:

These rugged, heavy duty units are exceptionally well insulated against the ingress of dust and water. Their IP 55 protection ensures that the units can operate in wet conditions, such as in washing and dewatering applications. A very generous holding-down bolt design is incorporated. A common complaint in the past has often been that vibratory motors tended to come loose with the vibratory motion. A great deal of thought and attention has been given to the fastening design of these motors so as to keep them intact while vibrating. When compared with other makes of vibratory motors, the holding-down bolts are often in excess of 50-1 00% over designed.

This, together with stress-relieved and machined surfaces and correctly torched nuts and locknuts, results in an exceptionally secure vibrator fastening system. When two vibratory motors of the same frequency are fixed to a rigid common base, which is freely suspended, or supported and run in opposite directions to each other, they automatically synchronise to produce a straight line motion. When this motion is applied to a screen, the result is a horizontal action screen suitable for screening, conveying and dewatering of a large variety of products in limited headroom situations.

MODELS OF DEWATERING SCREENS :
Dewatering Screens Model-1

Star Trace pioneered the use of vibratory motor drive on large horizontal screens with advantage to the user simplicity, compactness, and reduced installation and maintenance costs. By mounting the entire drive mechanism on the screen the following equipment is made redundant: external drive motor, motor support structure, v-belt or cardon shaft drive connection, oscillator timing gears, and snubbers for protecting the drive component during start-up and shut-down. Designed for either dry or wet operation, these machines give outstanding service in product sizing, degritting, medium-recovery, trash removal and desliming applications. Screen sizes range from 300x900 mm to 3000x9000 mm single and multi-deck configurations. Deck materials include perforated plate, woven wire mesh, polyurethane, rubber and wedge-wire. Accessories include dust enclosure, integral spray-pipes, and sub-frames to further isolate the screen supports from transmitted vibrations loads.

Non-standard screen sizes are manufactured to order and screens can be supplied in stainless steel and 3CR12.

Dewatering Screens Model-2

Star Trace produces a range of inclined screen to suit specific requirements in handling coal, minerals and in sand washing . Deck sizes range from 450 x 900 mm to 3000 x 9000mm. Machines up to 1200 x 1500 mm deck size are powered by single vibrator motor, simplifying installation and maintenance requirements. Larger machines either employ the tried and tested externally driven single oscillator mechanism or paired vibrator motor. As with the Horizontal Screens, screening surfaces include punched plate, woven mesh, rubber and polyurethane panels. The machines can be supplied with dust enclosures, water sprays and sub-frames, integral under pans and oversize chutes.

Dewatering Screens Model-3

Origination From The Successful Range Of Horizontal Screen, Star trace has developed a series of dewatering screens, Specifically designed for operation in product dewatering applications, Star Trace Dewatering Screens are providing the same benefits in wet-processing plants as the Horizontal Screens have given since 1977 .Powered by vibratory motors, Star Trace Dewatering Screens are manufactured in deck size ranging from 600 x 1800mm to 3000 x 6000 mm. Deck surface are either modular polyurethane panels or stainless steel wedge-wire to suit the individual application as to cleaning of coal, minerals and sand washing. AS Dewatering Screens are normally operated at 2 -5o upward inclination, Star Trace Dewatering screens feature supplementary drain panels in the back and side plates, to facilitate the removal of free water.

  • A 900 x 2700 mm Dewatering screen with polyurethane deck panels and wedge wire drainage panels, driven by two vibratory motors.
  • Detail of the feed end of a dewatering screen showing the sloped feed section and polyurethane deck panels.
DEWATERING SCREEN FEATURES :
  • Individually Replaceable Cross Members
    Instead of the old type of fabricated screen decks, all STARTRACE screens now incorporate a unique bolted deck arrangement. This means that when wear occurs and deck replacement becomes necessary, only the worn sections are replaced. This is far easier than stripping the entire screen and handling large, heavy fabricated frames. When polyurethane panels are to be fitted to screens up to and including 1 200 mm in width, the panels are located directly into the individually replaceable cross members. The panel and cross member, by direct impingement of the material being screened, is prevented. On larger screens, the cross members can be rubber lined for protection.
  • Angle Runner System for polyurethane Modular Units
    One of the most common complaints with conventional frames for polyurethane panels is the premature wear of the pinholes in the deck, with resultant loosening of the panels. On screens over 1200 mm in width, easily replaceable angle runners are provided to secure the polyurethane panels. With wear, only those runners affected need be replaced, thus reducing costs and downtime.
  • Flat Bar Runner System for Woven Wire Decks
    As in the angle runner system for polyurethane decks, the flat bar stringers are bolted to the cross members, resulting in an easy to maintain deck arrangement.
  • Automatic Alignment of Tensioning Bolts for side Tensioned woven wire Decks
    The illustration show clearly the simplicity of this device. The swivel half cups automatically align the tensing bolts to the exact angle to accommodate various wire thickness.
  • Built-in, Lined Feed Boxes and Discharge Lips
    The simplicity of the design of these built in items ensures that feed boxes and discharge lips cannot come loose.
  • Stress Relieving
    The entire welded fabrication is stress relieved to ensure that all residual welding stresses are removed.
  • Screening Surface
    The screens can be fitted with a variety of screening surfaces, such as punched plate, tensioned woven wire, polyurethane or rubber mats, plug-in polyurethane panels, or wedge wire panels.
DEWATERING SCREEN BENEFITS :

The advantages of STAR TRACE Dewatering Screens are that use of the following equipment has now been rendered unnecessary:

  • Consistently dewatered product output
  • Oilbath oscillators, with synchronizing gears and oil leaks.
  • Motor support stand, or overhead structure for motor support.
  • Snubbers - the screen-mounted drive has eliminated the need for snubbers to reduce damage to vee-belts and external motors during the large oscillations that normally occur during stopping.
  • Bearing failure is limited to the bearing itself. Particles from a failed bearing cannot circulate in an oil bath and cause possible damage to other bearings and synchronizing gears. Compactness - screens can be positioned very closely with a minimum of space wastage. A vibrating or vibratory motor needing reconditioning can easily be exchanged for a standby unit, with a minimum of downtime. Due to the absence of gears and vee-belts, the units use less power than conventional drives.
Dewatering Key Benefits:
  • Consistently dewatered product output - typically less than 14% mositure content ensures product is ready for market straight from the belts.
  • Supplied with modular Polyurethane non-bolted panels as standard for maximum wear resistance and ease of maintenance.
  • Fully rubber lined discharge chutes for maximum wear resistance.
  • Marshmallow screen mounts to harness vibration on the screen and minimise its transfer to the supporting structure thus minimising stress.
  • Tow high frequency 3.6kw vibrating motors fitted as standard (2no 9kw motors standard on A-series) to ensure maximum dewatering.
  • Unique goal post design above vibrating motors provides additional plant safety by removing cabling from the motors and any other moving parts of the plant.

With ever growing need for advancement in technology we at Star Trace bring in new technologies to give our clients improved performance. As leading manufacturers, suppliers and exporters we have brought in new technologies which have increased production for our clients and improved our sales turnover to a great extent.Serving globally, the scope of sale has increased by reaching out to more number of clients.

DEWATERING SCREEN SPECIFICATION :
Dewatering Screen

Specification 1

Technical Specification
Model No. Width
mm
Length
mm
Weight
Kg
Power
kW
Capacity
TPH
STRDS-300 300 1600 350 1.1  
STRDS-600 600 1600 450 1.8  
STRDS-600 600 2400 940 3.2  
STRDS-900 900 2400 1150 4.4  
STRDS-900 900 3200 1575 7.2  
STRDS-1200 1200 2400 1425 7.2  
STRDS-1200 1200 3200 2200 12  
STRDS-1500 1500 2400 1950 12  
STRDS-1500 1500 3200 2500 10  
STRDS-1800 1800 3200 3000 15  
STRDS-1800 1800 4000 3900 18  
STRDS-2100 2100 3200 3475 18  
STRDS-2100 2100 4000 4575 21.2  
STRDS-2400 2400 4800 6450 38  
STRDS-2400 2400 5600 7075 38  

Specification 2

Technical Specification
Model No. Kg KW A B C D E F G H J K L M N P Q R S T U V AA BB CC Dia DD EE FF Total Dynamic
(N) @ 45
STDS-9-3 80 2 x 0.13 305 918 40 40 - 220 130 130 40 - 173 700 85 586 100 80 100 - 180 435 550 410 380 - 522 45 - 450
STDS-12-6 400 2 x 0.4 610 1220 50 100 165 565 130 130 50 110 250 940 402 752 145 80 75 145 115 487 1070 720 330 225 950 20 80 580
STDS-18-6 480 2 x 0.4 610 1830 50 162 306 840 280 140 162 200 510 1240 548 875 150 150 25 100 230 640 1080 720 340 190 960 20 80 770
STDS-24-6 650 2 x 0.85 610 2440 50 162 300 1140 270 130 162 120 700 1665 535 930 170 180 25 100 180 640 1020 750 420 245 1000 20 80 1245
STDS-30-6 750 2 x 1.1 610 3050 50 162 300 1390 420 280 182 60 730 1990 790 1100 180 200 25 100 300 780 1100 720 480 265 980 20 80 2540
STDS-36-6 850 2 x 1.5 762 3660 60 150 350 1550 280 140 150 350 552 2795 753 1115 150 230 70 100 280 810 1060 720 530 295 940 20 90 1350
STDS-15-8 760 2 x 0.85 914 1524 60 262 165 650 270 130 277 85 266 1500 204 1000 120 195 85 120 312 695 1230 872 360 225 1110 20 80 860
STDS-18-9 540 2 x 0.85 914 1830 60 162 300 812 280 140 162 250 500 1340 450 995 180 140 25 100 256 670 1410 1026 420 245 1280 20 90 1370
STDS-24-9 830 2 x 1.1 914 2440 60 162 300 870 280 140 162 200 580 1685 685 1155 180 170 25 100 230 620 1384 1024 480 265 1264 20 80 1380
STDS-30-9 1100 2 x 1.5 914 3050 60 162 300 1390 420 280 162 200 730 1990 790 1100 180 200 25 100 300 780 1410 1024 530 295 1290 20 80 2450
STDS-36-9 1600 2 x 1.5 914 3660 60 150 300 1470 340 150 150 170 467 3048 595 1576 180 420 150 100 430 1160 1450 1090 530 295 1250 20 150 1340
STDS-18-12 950 2 x 1.1 1220 1830 60 162 300 812 160 160 162 200 345 1440 505 1230 260 200 90 170 260 896 1860 1332 480 265 1660 20 160 2415
STDS-24-12 1220 2 x 1.5 1220 2440 60 162 300 1130 420 280 162 120 605 1580 715 1160 250 150 90 170 230 820 1740 1360 530 295 1620 20 80 2210
STDS-30-12 1350 2 x 1.5 1220 3050 60 162 410 1385 420 280 80 250 730 1990 900 1200 250 200 60 170 320 880 1740 1360 530 295 1620 20 80 2000
STDS-38-12 1970 2 x 3 1220 3660 70 200 300 1425 500 330 145 250 530 2785 845 1570 250 250 165 275 325 1180 1820 1366 690 345 1660 20 120 5150
STDS-48-12 2400 2 x 3.7 1220 4880 60 200 400 2080 550 400 200 250 850 3575 1055 1685 250 250 150 250 350 1260 1880 1365 700 395 1720 35 90 5855
STDS-33-15 1900 2 x 3.7 1524 3350 - 162 - 1420 500 330 125 - 646 2810 285 1460 180 240 130 - 645 100 2070 1670 700 395 1910 20 120 7120
STDS-36-15 2050 2 x 3.7 1524 3660 80 200 400 1350 560 400 145 300 500 2860 900 1570 300 350 165 300 350 1180 2160 1670 700 395 2000 35 90 6600
STDS-42-15 3000 2 x 5.5 1524 4267 80 300 400 1950 560 400 300 300 800 3200 972 1800 310 340 130 310 340 1380 2210 1700 800 395 2050 35 90 6250
STDS-48-15 3000 2 x 5.5 1524 4880 80 305 400 2195 560 400 300 350 915 3660 1070 1850 300 350 70 300 450 1425 2160 1684 800 395 1960 35 90 6020
STDS-36-18 2500 2 x 6 1830 3660 80 200 400 1400 560 400 150 300 560 2500 1190 1700 300 350 165 300 350 1200 2510 2006 900 465 2350 35 90 12100
STDS-48-18 4000 2 x 7.5 1830 4880 80 305 400 2180 560 400 300 300 945 3380 1260 1885 300 350 160 300 530 1430 2560 2006 1030 515 2400 35 90 11000
STDS-36-21 3700 2 x 6 2180 3880 100 200 400 1400 580 400 200 300 750 2685 825 1815 340 300 230 340 300 1360 2820 2310 900 465 2858 35 90 10000
STDS-48-21 4600 2 x 7.5 2140 4880 100 305 400 2190 580 400 300 300 905 3575 1105 2300 340 310 180 300 350 1430 2780 2310 1030 515 2620 35 90 9510
STDS-48-24 6500 2 x 9 2440 4880 100 305 455 2190 480 330 300 356 915 3660 1065 2300 365 285 210 300 435 1625 3240 2620 1080 515 3020 20 200 11050
STDS-52-24 6750 2 x 9 2440 5200 100 305 455 2300 700 480 300 356 1150 3430 1380 2300 365 355 210 300 450 1625 3240 2620 1080 515 3020 25 200 11560
STDS-61-24 9000 2 x 15 2440 6100 100 305 455 2650 1080 70 300 356 1105 4800 955 2500 395 315 180 365 555 1700 3240 2680 1200 610 3080 20 120 17700
STDS-48-30 8750 2 x 11 3050 4880 150 305 455 2305 660 430 300 356 1005 3400 1235 2300 365 355 210 300 540 1700 3910 3300 1090 580 3700 25 160 18940
STDS-61-30 9500 2 x 15 3050 6100 150 305 455 2650 1080 700 300 356 1105 4800 955 2500 395 315 180 365 555 1700 3800 3300 1200 610 3640 20 120 17000
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