SCREENING AND WASHING
washing plant at CONEXPO-CON / AGG 2017, the M5500. The UK-headquartered company said in a statement that the new machine can produce up to 550 t / h of washed materials on a single chassis. Kevin Vallelly, Head of Product Development at CDE, said:“ This latest addition to the M-Series combines feeding, screening, washing and stockpiling onto one chassis, and packs an extra punch with unique features. These include a higher capacity of 550 t / h, a five-product capability and triple pass cyclone sand washing.”
A selection of Infinity screens, the company’ s new development in screening technology, were also launched on the North American market along with other new technologies.
Adapted to applications in both dry and wet screening situations across a wide range of materials, the new CDE Infinity technology is of particular interest to operators looking for sturdier and more economical vibrating screens.
Neil Mullan, Design Engineer at CDE, said:“ We sell over 200 screens every year to the global market, either as part of( our) modular equipment or as stand-alone. The new weld-free Infinity screens can generate the same acceleration as conventional screens with less weight, resulting in a reduction in power consumption and in operational costs, which presents significant benefits to our clients’ operations.”
According to CDE, its materials washing equipment allows for more accurate material classification than traditional sand washing methods, higher quality washed sand, reduced costs of pond excavation, and reduced risks on site. The final product exits the plant ready for use, having been dewatered to 15 % moisture.
CDE says its customer Cluster Holdings in West Rand, South Africa, had given up on ever recovering fines their sand screw classifier system had discharged into ponds but with the introduction of the CDE EvoWash 71 sand washing plant to their operations, they are now producing high quality plaster sand from waste pond material.“ With CDE technology, fines are fully recovered and turned into profit and a very competitive return on investment.”
The quarry is located half way between Carletonville and Randfontein. Rich in decomposed granite, it was ideal terrain to develop a materials processing business to supply local construction companies with washed plaster sand. At the start of its washing operations in 1986, the company opted for sand screw classifiers to wash the granite, a cheap and popular choice in South Africa, but also an option that creates a lot of waste to ponds and loss of potential profits. The subsequent switch to a cyclone tower resulted from identifying the potential in the plaster sand market in the area,
Wayne Warren, Business Development Manager for sub-Saharan Africa at CDE; with Kobus Jv Rensburg of Cluster Holdings
but did not achieve the desired results in quality and led to wet stockpiles.
Wayne Warren, Business Development Manager for sub-Saharan Africa at CDE, noticed Cluster Holdings operations’ while on the road to visit a client and stopped by. He said:“ Being in a reasonably remote area, the road past Cluster Holdings’ mining area allows you to get an overview of their operations. I could see where issues might be and knew that CDE had solutions that could up production at most current washing plants. Little did I realise that this site had such extreme potential in what up until then was called waste. In effect, unknown to our customer, plaster sand was laying in abundance, hidden at the bottom of ponds, and with adapted CDE technology could be recovered and processed into a valuable product.”
Kobus Jv Rensburg of Cluster Holdings, provided samples for tests.“ It turned out that the waste sand had one of the best plaster sand grading I had come across in some time and it became Cluster Holdings’ priority to recover it.”
CDE has a good footprint in South Africa, so the customer had the opportunity to visit a few sites showcasing the CDE EvoWash in action. Having witnessed the efficiency of the EvoWash that produced a sand dry enough to be handled and loaded as it came off the stockpile conveyor, Cluster Holdings opted for CDE technology. An EvoWash 71 materials washing plant was commissioned and installed to process the raw decomposed granite feed. The EvoWash removes the-75 μ fines from the sand slurry feed and dewaters it to produce up to 50 t / h within specification for plaster sand.
Jv Rensburg comments:“ After years of trial and error, we are delighted with our choice. We had two plants that were not efficient enough
for our purposes and replacing them with a single plant and process was beneficial in terms of footprint, value for money and efficiency.” Late last year, McCloskey International announced the launch of McCloskey Washing Systems( MWS), a new business division focused on washing and classifying across multiple applications. The new unit designs and manufactures a full range of mobile, modular and static material and mineral washing equipment. While McCloskey International has been producing equipment for the quarrying, recycling, mining and industrial sand sectors for over 30 years, this new division has been created to provide 100 % focus on the development of class-leading innovative and efficient equipment for washing and classifying material and mineral products.
McCloskey International’ s President and CEO Paschal McCloskey said:“ Our customers are always looking for more modern, flexible and cost-effective solutions. Our customer-driven approach to product development has led us to invest significantly in the establishment of this new division, with the aim to be the design and manufacture of high quality washing equipment that is easy to install, maintain and operate.”
The products produced by the new division“ will deliver significant advantages to customers, including lower cost of ownership, lower cost of production, and making more projects viable for their business.”
The three model SandStorm range is made up of the 516, 620 and 824 machines which can process up to 550 t / h, and producing up to four grades of aggregate and two grades of classified sand. SandStorm has also been enhanced with the new S-Line range, that offers the benefits of the modular plant with the McCloskey range of Sand Screws. Finally, the new McCloskey Washing Systems AggStorm Range can operate as stand-alone units or can integrate with the SandStorm wash plants. They can handle various types of clay-bound material where more aggressive scrubbing and washing is needed rather than simple screening alone.
Screening and screen media technologies
Screening media specialist Multotec is using its‘ deck map’ methodology to“ constantly raise the bar” in optimising screen output and lifespan, according to Shawn Faba, Multotec Manufacturing Product Manager Screening.“ Multotec has built on its concept of the composite deck for over a decade, and differentiated ourselves by developing the deck map to design specific screening solutions for a wide range of materials with various characteristics,” says Faba.
The panels are easily interchangeable on
12 International Mining | OCTOBER 2017