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Mechanical Technology — February 2016

21

Materials handling and minerals processing

Enduron dewatering screens ensure maximum

efficiency and lowest cost of ownership.

JHDA and Portaclone. “Weir Minerals Africa

continues to provide support for these screens

and, in a number of installations, the screens

have operated for in excess of 10 years

without any replacements being necessary,”

says Winchester Maphosa – Weir Minerals

Africa product manager for comminution and

screens.

He explains that Weir Minerals has imple-

mented a number of innovations to improve

the design of the dewatering screens in order

to increase the longevity and maintainability

of the screens. An example he cites is the

replacement of the corrosion resistant 3CR12

box deck frame design with a crossbeam and

3CR12 stringer/runner design. This has elimi-

nated the downtime and production losses

that previously resulted from premature deck

failures due to latent welding defects.

Another brand within the Linatex range

from Weir Minerals recently launched in the

North American coal market is the high per-

formance Fusioncast

®

polyurethane screen

media panels. The material is designed to

maximise service life through superior abrasion

resistance, a critical factor in coal dewatering.

The product’s properties and wear characteris-

tics make it ideal for use in a number of coal

applications including raw coal refuse screens

and fine screening.

“In field trials it was confirmed that the

product exhibits wear life advantages of up

to 50% when compared to injection moulded

polyurethane screen media panels. This results

in a significant time and cost saving for cus-

tomers. Added operational flexibility is also a

feature, because the product can be supplied

with a wide range of openings for separations

as coarse as 25 mm,” says O’Bryan

An example of the success of this product

is in an operation in North America’s Western

Kentucky. After conducting six weeks of head

to head trials between the existing continu-

ous slot panels and the Fusioncast panels,

the Fusioncast panels were found to have a

significantly superior wear life performance.

“As a result of the resounding success of

the Fusioncast technology trials, the customer

opted to replace the 1 100-plus panels with

Fusioncast panels throughout various raw

coal, clean coal and fine refuse screening ap-

plications in its plant. Further leveraging the

success of the trials, the company has been

invited to tender on a number of screen media

supply contracts, including one for some of

the world’s largest coal preparation plants,”

O’Bryan points out.

In 2014 Weir Minerals Africa aligned its

screens brand with its Enduron comminution

equipment, allowing the company to provide

3.0 to 4.3 m wide screen designs for large

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modular coal plants. O’Bryan says

that the Enduron VD dewatering

screen range has been designed to

ensure that maximum efficiency and

lowest cost of ownership is achieved.

Featuring an innovative 45° degree

feed section, the Enduron screen’s feed

profile effectively increases the screen-

ing area and the dewatering capacities,

using high feed end velocities to aid in

the dewatering process. The main deck

of the screen slopes upwards to maxi-

mise solids retention and to dewater

the cake bed.

The lightweight Enduron VD dewa-

tering screen is suited to applications

in the sand and aggregates, and min-

ing and minerals processing industries

and can be supplied in variations from

0.3 to 3.0 m wide.

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