CDE Global recognized for advances in C&D recycling technology
This past spring, the European Quality Association for Recycling (EQAR) held their annual conference in Rotterdam where CDE Global was recognized for recent innovations introduced to their equipment for the recycling of construction, demolition and excavation waste (CD&E waste). The award was given in recognition of the various product innovations launched by CDE Global and first introduced on a recently completed project in Stuttgart, Germany for Feess Erdbau GmbH.
“The project we have completed with Feess Erdbau in Stuttgart is a culmination of over a decade of experience in the design and delivery of recycling plants for construction and demolition waste,” said Eoin Heron, CDE regional manager for Europe and Russia. “Our initial project portfolio has been built in the UK market and this has expanded into Europe in recent years with great success.”
In particular, the Stuttgart project saw the launch of CDE’s R2500 primary screening unit (top, centre) as the feed system for C&D waste recycling plants.
“We developed the R2500 specifically for use on projects where difficult materials are being processed,” said Kevin Vallelly, CDE product development manager. “The machine allows for the efficient delivery of C&D waste material to the washing plant as a result of the large capacity feed hopper which can accommodate up to 20 tonnes of material. This ensures that the plant operator can charge-fill the plant and is also free to complete other work on site which eliminates the requirement for a dedicated person to feed the recycling plant.”
Ideally, as on the Stuttgart project, the R2500 removes any +100 mm material from the feed and this is discharged via the oversize stockpile conveyor. Meanwhile -100 mm material is delivered to CDE’s M2500 mobile washing plant.
The most significant recent development on the M2500 is the introduction of the new Infinity P2-75 bolted screen – a 5 m x 1.5 m (16 x 5) aggregate screen which has been awarded a global patent as a result of the construction of the side walls of the screen.
“Going back to day one of the design process we took our lead from the aerospace industry and how aircraft wings are designed,” said Neil Mullan, senior R&D engineer and product specialist for the CDE screening range, and who recently relocated from CDE’s headquarters in Ireland to working with CDE USA. “The only assumptions we made from a design perspective were that the screen was to be rectangular and have one, two or three screening decks.” According to Mullan the CDE Infinity screen range is able to generate the same acceleration as conventional screens with less weight, which results in a reduction in power consumption, reducing operational costs.
“The focus on reducing power consumption is evident in several of the design innovations within the Infinity range and is achieved in balance with using power efficiently,” said Mullan. He says ferrous metals are also removed at this stage of the process through the deployment of an overband magnet on the M2500 feed conveyor with the metals stockpiled in a skip.
The top deck of the Infinity P2-75 screen removes the +45 mm material while the 8 mm to 45 mm material progresses to a scrubbing phase. This involves the AggMax portable logwasher which subjects material to extreme attrition in order to liberate recycled aggregate material and effectively remove fine silts and clays from a C&D waste feed. It is here that “lightweights” and other contaminants are also removed including organics, wood, plastics, paper and polystyrene. After passing through the AggMax the recycled and washed aggregates are sized into 8 to 16 mm, 16 to 32 mm and 32 to 45 mm product.
CDE announced the launch of their new Infinity screening range along with the R-Series range of primary screens, to global markets, including North America, earlier this year. According to Mullan, the company is not as well known for their expertise in screens as they are for their washing equipment.
“We sell over 200 screens a year to the global market and these are largely integrated into the modular equipment that we have become well known for,” he said. “The development of the new Infinity screening range is an opportunity for us to increase awareness of the screening range that we produce. Securing the global patent for the new design proves our capability in this area.” All screens within the new Infinity range are available for application in both dry and wet screening situations across a wide range of materials including construction and demolition waste, aggregates, top soil, coal, iron ore and other mineral ores. “The Infinity screens are available as stand-alone screenboxes as well as being integrated into our modular equipment. We hope the innovations within the range will allow us to make a mark in this area of the market,” said Mullan.