orks ound W & Undergr

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1 & Underground Works

2 Our closed loop STP s for use on underground works will: - Maximise bentonite recovery - Maximise de-sanding and de-silting of bentonite slurries - Maximise recovery of mineral material for further use - Maximise water recycling for reuse in TBM operations Bentonite recovery Our experience in the design and manufacture of hydrocyclone configurations ensures unrivalled cut point control. De-sanding and de-silting of bentonite slurries Our high frequency dewatering technology ensures efficient separation of crushed material from your bentonite slurries. Recovery of material for further use Following dewatering, your mineral tunnel waste can be screened and graded to allow for on-site production of mass concrete and sprayed concrete. Water recycling Introduction of our thickening & sludge management systems to deal with the recovered bentonite slurries allows process water to be recycled to your TBM operations.

3 1 TBM 1 TBM Operation Tunnel Boring Machine 5 Thickening Bentonite particles are thickened and separated from process water. 2 Pumps 7 Water Recycling 2 Pumps To deliver waste slurries containing bentonite, tunnel waste (muck) and process water to slurry separation plant 6 Bentonite Dewatering Recovered bentonite is dewatered using high pressure filtration systems 4 3 De-sanding & De-silting Bentonite Recovery 6 Bentonite Dewatering 3 De-sanding & De-silting Designed according to the specifics of on-site ground conditions these systems include various hydrocyclone treatments & high frequency dewatering of tunnel waste material 4 Bentonite Recovery Hydrocyclone separation removes the bentonite in suspension with waste water. 7 Water Recycling Recovered process water is recycled to the TBM operation or discharged after appropriate treatment 5 Thickening

4 Why Choose CDE? CDE ProMan World Class Project Management Modular Equipment Our building block structure allows for easy modification of your plant as and when required Mobile Designed with mobility in mind you are able to move your plant between different processing locations Customised No short-cuts, no compromises. Just the best system configuration to suit the individual requirements of your project Experience Constantly evolving sector-defining equipment, a dynamic and innovative team, award winning business management and unrivalled dedication to giving each client a professional experience. These factors have made us the world s leading materials washing company. We understand that every underground works project is different in relation to the space available to accommodate the plant and the logistics of how material will be transferred from your TBM Operation. Our experience in the design of large turnkey mineral processing projects ensures your project will be designed and delivered to the highest possible standards CDE s ProMan system is proven to deliver highly efficient and productive plants through a process which ensures that lines of communication are clear and everyone involved from both your side and ours knows exactly where the project sits at any given time. This system has been implemented effectively on numerous worldwide projects from the UK and Ireland to India, Middle East, Africa, North America and South America. A dedicated project team is appointed as soon as the project goes live which contains all the major disciplines required to deliver you a truly world class project. Through this process you are allocated a dedicated Single Point Of Contact (SPOC) who is ultimately responsible for the delivery of your project in its entirety. Services include: - Process Design - Equipment & component specification - Mechanical Design - Civil Design - Project Scheduling - Construction Management - Project Engineering - Quality Control

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