sandtrap product pres tent at ion

8/6/2019 Sandtrap Product Pres Tent at Ion

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SANDTRAPSANDTRAP

Tec hn ic a l Present a t ion Tec hn ic a l Present a t ion


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APPLICATIONAPPLICATION


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3 David VOUILLON October 2005

Sandt rap : Appl ic a t ion Sandtraps are the classic

machines for recovery of sandand fine sand from thedischarge water of a wet

screens or cyclone.

Feedsize: 0 - 2 (4) mm

Metso Sandtraps produce highsand recovery (100 / 120 ) toincrease production with a lowrunning cost.


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PROCESSPROCESS

DESCRIPTIONDESCRIPTION


5/215 David VOUILLON October 2005

Sandt rap : Proc ess desc r ip t ion

Sand and water mixture is fed into the Sandtrap through a central inletbelow the dewatering screen.

The material enter the trough in a non turbulent section on the dewateringwheel.


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Sandt rap : Proc ess desc r ip t ion The waste water flows over a weir

at the opposite end of themachine


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Sandt rap : Proc ess desc r ip t ion The dewatering wheel discharges the product into a discharge chute,

which feeds an integrated dewatering screen.


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Sandt rap : Proc ess desc r ip t ion To achieve higher dewatering effect, a Metso dewatering screen type ESU

is integrated into the machine.


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Sandt rap : Proc ess desc r ip t ionESU dew at er ing sc reen

ESU dewatering screens are used to reduce the moisture content of theproduct.

Water and very fine material will pass the screening surface in the feed end

of wet screen.

Material larger than the aperture of the screening surface will create a filterbed above the screening media. It will retain most of the fine particles on thescreen media. Water will pass through the filter bed and through the screenmedia.


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Excess water

Dewatered product

Surface water above the filter bed will discharge through the dewatering backwall.

The screening surface is slightly inclined. This allows the solids to dischargefrom the screen without excess water and the water will flow in the oppositedirection.


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The remaining screening length helps to dewater the filter bed further, as thematerial is transported over the incline of the screen. A dam at the end of the screening area can help to reduce the moisture

content by increasing the bed depth and this increase the pessure furtherhelps the dewatering effect.

Note: - Ratio solids [m) / water [m] approx. 1:1- Very fine material is difficult to dewater on a dewatering screen because it doesnt create

a filter bed.- The remaining moisture content depends on grading of the solids.


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TECHNICALTECHNICAL

DESCRIPTIONDESCRIPTION


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Sandt rap : Tec hnic a l desc r ip t ion

Large trough Screw conveyor which

runs very slow 3rpm.


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Buckets with polyurethanescreen media slot inserts

reduced slotted wear evenfor abrasive material


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Sandtrap and dewatering screen mounted together on one support frame. Electronic load dependant frequency controler which controls the speed

according to the feed capacity, for optimal sand discharge with efficientdewatering effect.


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Sandt rap : Tec hnic a l desc r ip t ionSandtraps offer:

High recovery rates

Low power requirements

Minimum maintenance

Minimum wear

A cheap solution to recoveryour sand.


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THE METSOTHE METSO

RANGERANGE


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Sand t rap : Met so RangeSF 2360 SF 2850 SF 2870 SF 2960 SF 2975

Dewaterer type ESU 8020 ESU 1220 ESU 1220 ESU 1525 ESU 1530

Dewaterer drive (kW) 2 x 0.9 2 x 1.7 2 x 1.7 2 x 1.9 2 x 3

Sand Capacity (t/h) 50-70 80-100 90-120 140-150 150-180

Feed capacity sand (m3/h) 35-40 50-60 60-65 70-80 80-100

Water required (m3/h) 200 250 280 300 350

Power (kW) 4 7.5 7.5 9.2 11

Length T (mm) 6000 5000 7000 6000 7500

Length L (mm) 8810 7870 9870 9520 11710

Width B (mm) 2570 3000 3000 3150 3150

Height H (mm) 2720 3000 3000 3000 3100

rotation speed (tr/min.) 2.8 2.8 2.8 2.8 2.6

Weight (Kg) 9000 10500 11700 12500 14000

Operating weight (Kg) 27000 33000 35000 38000 42000


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Sand t rap : Met so Range


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sandtrap product pres tent at ion

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