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Top Canadian Demolition Company Chooses Extec
Landfill costs for construction, demolition and land clearing debris continue to rise. As the landfill sites themselves become more heavily regulated it makes increasing economic sense to seek alternative means for disposal of materials such as the concrete from these construction and demolition operations. More disposal sites are opening up and contractors are incorporating recycling into their operations to decrease disposal costs. Recycling the concrete from demolition projects can result in considerable savings since it saves the costs of transporting concrete to the landfill and eliminates the cost of disposal. As well as providing a cheap aggregate! In terms of the overall environmental impact, recycling concrete greatly saves energy compared to the mining, processing and transporting of new aggregates. And whilst not considered environmentally damaging, the large volume of concrete waste generated during demolition makes it difficult for landfills to accommodate the material. One such company that has benefited from the opportunity to recycle leftover demolition material is Priestly Demolition Inc, from Aurora, Ontario. Priestly Demolition Inc, a family-run business, has been one of Ontario s leading contractors. For over 35 years Priestly has been providing safe and reliable demolition, abatement and remediation services to many commercial and governmental clients across Ontario. In becoming one of the areas major demolition companies Priestly takes great measures to ensure that all material removed from the demolition site is completely recycled as best as possible, with Priestly's goal to recycle at least 97% of all material extracted from every project. Priestly is well positioned to deal with any demolition requirement thanks to their specialist range of equipment which includes, hydraulic excavators, loaders, skid steers, dozers and an Extec Mega-bite track mounted jaw crusher. The crusher was purchased in 1999 to recycle concrete from the demolition operations. In order to process more materials and produce more resaleable products, Priestly decided to look for more efficient and cost effective ways to improve their recycling operations. After an intensive internal audit of capabilities, a new screening system was required that would increase the company's profitability. Following a review of current market offerings that would meet the requirements of Priestly's recycling operations Ryan Priestly, president of the company, turned to Paul King of McCloskey, Extec's agent in Canada. Mr. Priestly explained that the three main considerations for the required screener at the purchasing stage were: consistent product gradation, sufficient parts inventory, and after sales service. "We chose the Extec E-7 based on Paul King's encouraging after sales support and professionalism. The E-7 has been performing very well, segregating and sorting huge quantities of consistent graded products, which have significantly increased our overall recycling output and efficiency", Ryan Priestly explained.
The tracks, feeder, screen box conveyors and all other working parts of the E-7 are all hydraulically driven, with the impressive production coming from the highly aggressive screen box. The screen box is able to operate with punched plate, heavy duty mesh, rock fingers or grizzly bars on the top deck, with heavy duty mesh or fingers, on the bottom deck. Once demolition has taken place, material is loaded by excavator into the feeder where material is transferred towards to the screening area. The demolition material which consists of heavy clay, brick and stone, concrete and topsoil passes over the screen box where smaller material will fall through the top deck and onto the bottom deck. The smaller material that has fallen through to the bottom deck is transferred to the fines conveyors and is stockpiled at either side of the machine. The larger material that has stayed on the top deck is fed to the tail conveyor and is stockpiled at the rear of the machine. The tail conveyor is supported by an impact bed, which prevents roll-back or lateral movement of material. The features of the E-7 that have been very beneficial for Priestly Demolition Inc, are the double plated apron feeder and the ability to change screen mesh so quickly, as Ryan Priestly explained: "The hydraulic screen adjustment makes it very easy to change meshes for overhaul, cleaning or replacement. Changing the screen mesh is only a short process, making it very easy to achieve different end products without taking half a day to switch." The E-7 screen can be used independently or in conjunction with its fully mobile screening cousins. Its ability to deal with a variety of demolition material and high production rates have been instrumental in allowing demolition companies like Priestly Demolition Inc, to recycle material of good quality at competitive prices. Now that Priestly Demolition has a full complement of recycling equipment at their facility, they are able to fully pursue the opportunities in the region. "We expect material volumes to continue increasing and we are now well equipped to handle the greater volumes", Mr. Priestly added. Priestly Demolition Inc, still has huge potential with regards to their recycling facilities and has been pleased with the success that they have accomplished thus far. |
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Roger Murrow, 
The Extec E-7 screen is a heavy duty-track mounted, self-propelled,
open flow screening and stockpiling system, offering users tremendous performance
and productivity for the efficient high volume recycling of reusable demolition
material. The Extec E-7 has a high output capacity capable of a material
throughput of up to 600 t/h, depending on material, feed size, bucket size
and fines content.
