14 August 2015, 09:32
Materials washing specialists, CDE Global has announced a demonstration event for Fort Worth, Texas from October 6th to October 8th. The event will take place at a sand and gravel pit operated by Metroplex Sand & Gravel where a selection of equipment from the CDE portfolio will be operating.
This includes the M4500 modular washing plant which was launched to the global market at the ConExpo exhibition in Las Vegas during March 2014. This plant integrates a feed system, aggregate screening, sand washing and stockpiling on a single chassis allowing for rapid deployment on site while also minimising the space required to accommodate the plant. The M4500 has a maximum feed capacity of 450 tons per hour via direct feed. If required, the plant will also accept crushed material directly to the feed boot from a transfer conveyor.
Register for this event
The +3” material will be delivered to an oversize stockpile from the top deck of the 20x6 rinsing screen on the M4500 with the 1/4” to 3” material being transferred to the AggMax portable logwasher. Once the gravel has been scrubbed to remove clays it will be stockpiled into 2 product grades – ¼” to 1/2”, ½” to 1 ½ ” while the +1 ½ ” material will be delivered to the crushing circuit before being returned to the M4500. The AggMax also includes a dewatering screen at the rear which will accept the lightweight organics floated off from the gravel fraction and dewaters these before stockpiling in a product bay underneath the machine.
The minus 1/4” material is sent to the sand washing element of the M4500 which is configured with a dual pass cyclone arrangement. The sand material is first delivered to two 25” cyclones where the first separation occurs. The material is then discharged from the cyclones to one side of an A-Series VibroSync split dewatering screen before a coarse sand is stockpiled via a radial stockpile conveyor.
Some material is allowed to pass through the dewatering screen to the sand plant sump and this material is then sent to the Counter Flow Classification Unit (CFCU) which facilitates further density separation by using an upward flow of water to carry lighter particles up while allowing the heavier particles to fall to the bottom of the CFCU tank. The material from the bottom of the tank is then delivered to the second side of the split A-series VibroSync dewatering screen and a 100 mesh to 18 mesh fine sand product is stockpiled via the integrated M4500 stockpile conveyor. Meanwhile the lightweight material from the CFCU is delivered to an additional EvoWash 71 sand washing plant where a 200 mesh to 400 mesh cushion sand product is stockpiled.
The plant also includes an AquaCycle A600 thickener which accepts all the waste water and minus 200 mesh fines which are dosed with a flocculant on entry to the tank. This facilitates the settlement of the fine particles to the bottom of the thickener tank while the clean water overflows the peripheral weir and is recycled to the wash plant.
Introduction of the AquaCycle thickener achieves 90% recycling of process water and as a result significantly reduces the volumes of fresh water required to feed the plant. It also reduces the space required on site to accommodate settling ponds and increases health & safety on site.
This event will mark the second demonstration event that CDE have hosted in North America after a similar event in North Carolina during 2014. “We are looking forward to welcoming visitors to the Metroplex site in October and we are very grateful to Keith Newell and the team at Metroplex for facilitating this event” says Joel Prince, CDE General Manager, North America.
Speaking about the decision to choose a CDE wash plant, Keith Newell of Metroplex said “We were introduced to CDE at the 2014 ConExpo Con/ Agg show. Shortly thereafter, a member of our team visited the GS Materials Plant in North Carolina. We were immediately impressed by the plant’s ability to manage gradation and silt cuts – producing a golf course spec sand the first pass. With conventional classifying equipment and sand screws this is difficult to say the least.”
The new wash plant is currently approaching the end of the install phase – a process that Keith Newell explains has gone very well. “The modularity and relatively small foot print of the M4500 is an obvious plus and the time it has all taken to come together has been shorter than we would have thought possible” he says. “The quality of equipment design and the strength of its manufacturing is truly remarkable as well, as is the precision with which the plant fits together. Perhaps most important, the AquaCycle thickener greatly diminishes our freshwater requirements. Our current plant requires 6,000 GPM; the M4500 – although it uses approximately 2,600 GPM – requires only 300 GPM of new water.”
As with all CDE installations the Metroplex project was delivered according to the CDE project management system – ProMan. This is another benefit of the CDE approach according to Keith Newell. “From the design phase, engineering, and installation – the professionalism and expertise of CDE’s personnel clearly matches the quality of their equipment. For example, I couldn’t help but smile when Joe Owens – one of their most experienced installation engineers – having worked six hard days last week – slapped me on the back and stated “Good Stuff” on the idea of working Sundays.”
Further information on the demonstration event and how to register is available on the CDE website at www.cdeusa.com. You can also find out more about Metroplex Sand & Gravel at www.metroplexsand.com.
The event at Metroplex Sand & Gravel in October is one of a series of demonstration events being organised by CDE across the world, further details of which can be found on their Global Events Page.