Contractors World

The UK and Ireland's only FREE to READ publication for construction, demolition, mining and quarrying industries
in a convenient digital format

Contractors World  - UK & Ireland
2013 Vol 3 No 3
Forward: Print Page Register (free) Bookmark Page

Contractors World UK
More news in the
Contractors World - International issue



• back issues
•  brochures

previous page   PAGE 14 of 38    next page

Tweet this page



Construction And Demolition Aggregates Recycling Plant For New Commonwealth Games page 3 of 3

Contractors World Aerial view of the site under preparation.

Aerial view of the site under preparation.

Complete processing cycle

Material is first fed to a H9 Feeder fitted with a double deck vibrating grid. This initial feed stage is powered by a 22  kw Electric Hydraulic Powerpack. The vibrating grid is required to handle the variable sticky material and remove any oversize.

The static 30 m lattice main feed conveyor transports material from the variable speed belt feeder to the 165 R screen. The feed conveyor has an over-band fitted to remove ferrous materials via a stainless steel chute to a skip for recycling. This conveyor is electrically powered via a Fenner gearbox and pulley system.

The material receives an initial soaking in a rubber lined wash box before being delivered to the 165 R screen. The 16’ x 5’ screen is fitted with a 50 mm polyurethane top deck and split bottom deck of 5 mm and 3 mm. 50 mm oversize is rinsed clean and removed at this stage to be sent to an impact crusher for resizing.

Material between 5 mm and 50 mm is rinsed and continues into a PS 120R. The rinsed fines drop through either the 3 or 5 mm polyurethane split bottom deck. The 5 mm material is fed directly to the FM 120 C dewatering screen to be dewatered and stock piled by a TC 4026 conveyor.

The finer material 3 mm and below is piped to the prewash where initial clays and silts are floated off to sump tank 1 while heavier sand material drop to the bottom of the prewash to be pumped up into a separator, where again silts and clays are removed in the overflow to sump tank 1.

Contractors World - Komatsu excavators and wheel loaders are the primary tools for handling and feeding the washing system

Komatsu excavators and wheel loaders are the primary tools for handling and feeding the washing system

   The underflow from the separator then flows into the tank of the FM120 C which is fitted with a second separator to which material from the tank is pumped by the centrifugal pump. Over flow is again sent to sump tank 1 while the underflow is delivered to the dewatering screen to be dewatered and stockpiled via a TC 4026 conveyor.

The overflows from sump tank 1 are pumped by a vertical shaft pump to the water treatment plant. The water treatment plant currently consists of a flocculent dosing plant, 10 m thickener tank and fresh water.

The 5-50 mm aggregate sent to the PS 120R is scrubbed clean with any clays and lights floated off through a trough to the integrated DW062 dewatering screen where above 500 micron material is delivered to a skip while fines are delivered to sump tank 2.

The scrubbed aggregate exits the PS 120R onto an integrated DW125-2 (12’ x 5’ two-deck dewatering screen). The material receives an initial rinse to remove any last remaining grit and remove any film attached to the aggregate.

The fines from this rinsing process are washed into a part rinser catchbox and piped to sump tank 2. The DW125-2D screen is fitted with a 22 mm top deck and split bottom deck of 10 mm and 5 mm.

Three TC 4026 conveyors stock pile the resultant 22-50 mm, 10-22 mm and 5-10 mm products. The dirty water sent to sump tank 2 from the two PS screens is then pumped using a vertical shaft pump to either the 165R screen for re-use or direct to the FM 120C tank. The flow is controlled using a saunders valve.

Recycled back to the construction industry

The end products are being sold into the market for construction projects and groundwork contracts throughout Glasgow as well as being used in Paterson’s Readymix and their concrete block making operations. This Terex Washing Systems plant completes the recycling process with construction, demolition and excavated material taken from sites around Glasgow, which is processed and is then returned to those sites in the form of clean, sized aggregate for drainage, Readymix Concrete, concrete blocks and asphalt.

Commenting on the new wash plant, Director Tom Paterson’s added, “As a major supplier of construction materials into the central belt the new Aggregates Recycling Plant is an important investment for our company to ensure we are able to offer a sustainable source of high quality coarse and fine aggregate. Our location is ideally suited to minimise haulage to and from the market we serve, whether this is for the excavations coming off site or for supply of material back to site.

The aggregates plant gives our site a new lease of life and will ensure a long term supply of high quality material for our customers and for our own complementary business of Readymix Concrete and Concrete Blocks”

Click here for information>>>
>>> Terex Washing Systems                                       >>> Patersons of Greenoakhill


previous page   PAGE 14 of 38   next page

red divide
CW Contractors World - the digital publication for construction industry

Contractors World Magazines are published by VVV Limited
©VVV Ltd 2013 All Rights Reserved

Publisher: Roger Lindley
Content compiled and edited by:
Roger Lindley MCIM

Page updated: April/May 2013



Contractors World -UK & Ireland
Contractors World - International up-to-date information on news, plant and equipment from around the world.


Contractros World - Australia
Australia News
Online Buyers Guide of Construction, Quarrying

Contractors World - Eco Friendly publishingBy reading this page on line you are helping to save trees.
Trees saved up to April/May 2012 > 1567

The monthly magazine Contractors World - UK & Ireland is proud to promote and support the Lighthouse Club Please give generously. Contractors World Support the Lighthouse Club

CML House
7 Bell Mead
Herts CM21 9ES
Tel: +44 1279 600598

Contractors World is many magazines in one - construction news for latest information (read our daily news pages) and a site equipment magazine featuring site reports from around the world and reviews of construction plant and equipment as it is introduced.

Written specifically for earthmovers, quarry management, plant hire executives, and others with an interest in the construction and related industries. Configured for all Internet devices, iPads, tablets and PDF readers.

Registered Office: 54 Sun Street, Waltham Abbey, Essex EN9 1EJ, UK
Registered as a company in England and Wales, number 3892263

Contractors World and the Contractors World - UK & Ireland Edition are independent publications published for CWMAGS Ltd by VVV Ltd.

The mention of companies and/or products within the editorial pages or in advertisements does not infer any endorsement by the publisher or editors. All editorial is freely given, without conditions and at the sole discretion of the editor. Opinions expressed by contributors are not necessarily those of the publishers. Other than saving and distributing in complete page formats, copying, reproduction, decoding or disassembly of content or computer code by any means of any part of the publication is prohibited unless prior approval is provided by VVV Ltd in writing and confirmation received of agreement with any terms and conditions applicable. PDF version may be downloaded for personal use but no content may be used for promotional purposes or copied to web sites. All images and video content are subject to copyrights.