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MINING SCREENS

TECHNICAL SPECIFICATION

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The Multi-Flo is a free swinging, banana shaped and linear motion screen. Motion is

provided by revolving eccentrics imparting both separating G-Force and the material

travel force components. The screen is design assured using Finite Element Analysis

(FEA), EN-1993-1-9:2005 (E). This is coupled with a robust, fabricated and "Huckbolted"

construction monitored and controlled through Metso's ISO9001:2000 Quality

accreditation. Welding in critical areas is minimized.

The product incorporates design initiatives to facilitate site maintenance and servicing

requirements, such as the use of bolted parts, replaceable wear linings (when supplied),

selection of drive mechanisms to achieve performance and provide acceptable bearing

life, and the availability of other optional improvements to suit particular application and

site environment.

The screen is designed for reliable operation in demanding applications such as mining

or quarrying.

The banana shape starts at 25º of inclination (feed end) and ends at 0º (discharge end) for

wet applications and starts at 25º and ends at 15º for dry applications.

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GENERAL INFORMATION

HE

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* For shipment dimensions consult next pages.

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GENERAL INFORMATION

Screen Model MF 2.4x7.3 DD

Size 2.4m x 7.3m (8ft x 24ft)

Quantity of Decks 2 (two)

General Arrangement dwg N11485879

Side Plate Thickness 12 mm

Main Dimensions with Default Options (excluding drive, dust encapsulation, shipping frame)

Length 7800 mm (25 ft 14.6 in)

Width 3366 mm (11 ft 0.9 in)

Height (Operating position) 4970 mm (16 ft 7.5 in)

Performance Data

Stroke 10 ~ 12 mm

Nominal Speed 820 rpm

Acceleration 4 ~ 5 g

Selected Motor Power 55 kW (75 hp)

Motor Quantity 1 (one)

Screen Slope 25º to 15º

Vibrator Mechanism

Model ML80

Description

Box type with 2 shafts fixed,

counterweights and oil lubricated

Quantity 2 (two)

Bearing Type Spherical Roller

Bearing L10 life > 30000 hours

Lubrication System

Manufacter / Model Exxon Mobil SHC630 or Similar

Type of lubricant Synthetic oil

Oil Reservoir Capacity 7.0 Liters

Interval between oil chages 1000 operating hours

Oil note: Lubrication system described above applies only for ambient temperature from 10ºC to 35º. Conditions beyond these

limits please contact Metso Minerals engineering.

NOTE: All information in this specification are for reference only. Subject to alteration without prior notice.

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GENERAL INFORMATION

Drive

Type V-belt drive - indirect

V-belt manufacturer Goodyear / Gates

Nº of belts / Size 6 / SPC-3750

Center to center sheaves (for 50Hz) 1227mm

Center to center sheaves (for 60Hz) 1378mm

Drive / driven sheave pit. diameter (for 50Hz) 275mm / 485mm

Drive / driven sheave pit. diameter (for 60Hz) 275mm / 570mm

Liners

Feed box side liner 60SH A Rubber – 50mm

Feed box bottom liner 60SH A Rubber – 40mm

Side plate protection liner 60SH A Rubber – 50mm

Discharge lip bottom liner Blank panels

Mass

Live weight with cloths and liners, without 19870 kg

drive

Live weight without cloths, liners and drive 17562 kg

Drive assembly mass without motor 630 kg

Shipping and Handling data

Total Shipping Weight 21770kg

Heaviest Item in Erection 19870 kg

Heaviest Item in Maintenance Vibratory Mech - 1745 kg each

Shipping Volume, L x W x H 9.1 m x 3.4 m x 3.7 m

NOTE: All information in this specification are for reference only. Subject to alteration without prior notice.

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DESCRIPITION - BASIC UNIT

Double Deck Banana Screen, assembled, shop tested and prepared for delivery each

screen complete with the following components and features: ML80 Mechanism(s),

one (1) heavy duty mechanism support beam, two (2) side plates, two (2) support

frames (also named as "decks"), one (1) feed box, one (1) set spring support

assembly, lifting lugs, handling cautions, safety decals, identification plates, full

workshop test, lubricants for commissioning purposes only.

LIFTING LUGS

FEED BOX WITH RUBBER LINERS

ML80 MECHANISM

HEAVY DUTY MECHANISM

SUPPORT BEAM

SIDE PLATE ASSEMBLY

SPRING BRACKET ASSEMBLY

SUPPORT FRAMES

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ML80 VIBRATING MECHANISM

ML80 MECHANISM COUNTER WEIGHT ADJUSTMENT

ML80 Mechanism with geared eccentric counterweights and oil lubricated, providing

linear acceleration in the line of action in consideration of the screening application. The main characteristics are: • Closed box; • Easily and adjustable external counter weights; • Oil tight mechanism sealed to prevent oil contamination and aiming maximum bearing life; • High capacity long life spherical roller bearing; • Double ends of drive shaft allow choice of right or left connection; • Continuous oil splash lubrication for better cooling and less maintenance; • Low noise precise synchronism gears; • Allows the connection by heavy duty cardan shaft; • Spare mechanism on hand in “as new” condition allow quick change and less down time.

MECHANISM SUPPORT BEAM

Mechanism support beam is fabricated from heavy sections and with machined bolted

surfaces ensuring accurate alignment of the mechanisms.

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SIDE PLATES

Side plates are fully profiled, with huckbolted stiffeners and spring brackets, no

welding.

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SUPPORT FRAME

Support frame (deck): sloped from

the feed to discharge end at angle

decrements to suit the application,

made from individually fabricated

members with attached longitudinal

deck support angles, designed to

support the screen surface. The

design of the support frame is

without any diagonal type bracing,

but consisted of rubber lining.

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FEED BOX

Feed box: facilitates even distribution of the feed material and fitted with liners

providing a protected impact area prior to the start of the screening surface.

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SPRING SUPPORT ASSEMBLY

Spring support assembly includes spring brackets (with ribs for easily springs removal), spring guides and

helical springs.

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OPTIONALS

• DUST CONTROL

Three different levels of dust control are available:

• Snap on profile:

•Snap on profiles on top, bottom and frontal part of the screen.

• Snap on profile + stationary kit:

•Snap on profiles on top, bottom and frontal part of the screen.

•Rubber grip strips;

•Trellex dust sealing cloth for interface between vibrating and stationary parts

•Snap on profiles for stationary parts

• Totally sealed screen:

•Snap on profiles on top, bottom and frontal part of the screen.

•Rubber grip strips;

•Trellex dust sealing cloth for interface between vibrating and stationary parts

•Top frame structure (arches and snap on profiles)

•Trellex dust sealing cloth for top cover

•Snap on profiles for under chute (the under chute itself is not supplied).

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OPTIONALS

• WASHING SYSTEM

Washing on screen is used to remove undesirable material, mostly clay and extremely

fine particles. It is also employed for the classification of fines and/or moist materials

whose screening is very difficult without washing.

FLEXIBLE HOSE (1 PER SPRAY BAR)

SPRAY BAR

VALVE

(1 PER SPRAY BAR)

Options include: FISH TAIL NOZZLES

• Washing on top deck only; • Washing on bottom deck only; • Washing on top and bottom deck; • One or both decks only prepared to receive washing system.

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• ISOLATION FRAME

ISOLATION FRAME – Metallic frame composed by profiles and fulfilled with

concrete, supported by springs and limited with shock absorbers.

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FRAME

SPRINGS

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OPTIONALS

•TRAVEL TRUCK

Travel truck (also referred to as “Transfer car”) allows easy screen

displacement* on rails for maintenance purposes.

* drive for movement and necessary devices (hydraulic jack, etc.) are not

included.

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• SCREENING MEDIA WITH LONGITUDINAL

BARS AND SIDE PROTECTION LINER

SIDE

PROTECTION LINER

LONGITUDINAL

BARS

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OPTIONALS

• CROSS MEMBERS WITH URETHANE COATING

* Coating standard thickness - 3mm

• SIDE PLATE LINERS

Trellex rubber liners (glued) or Urethane coating (3mm thickness) are available

to protect the side plate on the areas between decks and side protection liners.

Trellex rubber Urethane coating liners (3mm thickness)

• FEED BOX LINERS

9.5mm 12.5mm

AR400 steel liners

Other Feed Box Liners are available under price request.

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OPTIONALS

• SHIPPING FRAME

Shipping frame

• PACKING FOR SHIPMENT - SEA FREIGHT

Small components like drive are packaged in box (wood made pallets) as per

ISPM Publication Nº15. They are protected against corrosion during sea

transportation.

• DOCUMENTATION

Documentations available in English, Spanish or other language under request.

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WORKSHOP TEST

FULL WORKSHOP TEST INCLUDES:

• 4 hour no-load operation • Critical frequency analysis • Amplitude / orbital measurement • Mechanism operation • Screen body integrity check

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