One for all
February 19, 2009 By: P&Q Staff Pit & QuarryThalle Industries, part of the Thalle Construction Group, is using an Extec S-7 screen supplied by Extec Northeast at its aggregates plant north of New York City. “There’s a big construction and utilities market for our aggregates products right on our doorstep thanks to our close proximity to the Lower Hudson Valley and New York City,” said John Amato, Thalle’s project manager.
“The Bronx and Yankee Stadium can be reached by road in just 30 minutes,” Amato said. “This is a very profitable operation. We’re getting four different products from just one screening plant.”
Better still, according to Amato, the company’s Extec screending plant replaced two machines that were needed previously. “We had another manufacturer’s screen before this one, but it was smaller and couldn’t handle big loads of material. We found we had to keep an excavator on hand permanently to feed it.
“The Extec’s big hopper means we’ve managed to dispense with the excavator and utilize the Kawasaki wheeled loader instead,” Amato said. “With its 8-cu.-yd. bucket, it can be used to feed the Extec when it’s not loading trucks.
Therefore, Thalle Construction can manage with one machine less and one operator less, making the operation a lot more profitable. And Amato said the Extec’s Deutz engine has proved to be reliable and powerful, as well as economical.
The machine has a number of other benefits, according to Amato “It’s very simple to change the screens. Instead of a three-hour job, it’s a half-hour job,” he said. “We also have the capability to fit a 60-ft. radial stacker. This enables us to build a higher stockpile, so we don’t have to move the machine so often.”
No contest
Amato said the company trialed a number of machines before buying the Extec. “Working with local salesman Kevin McGuire, we had the Extec on demonstration, pitted against a rival manufacturer’s; there was no contest. It also produced a much cleaner material, and customers are discerning when it comes to quality.” The unit has extended the range of products Thalle Construction can supply and increased the company’s market share.
“We have also enjoyed a long working relationship with Extec Northeast’s managing director Damien Donaghy, and he has always provided us with an excellent after-sales service,” Amato added. “That played a key role in our purchasing decision.”
Also on the site are a track-mounted jaw plant and a cone crusher. “The Extec easily copes with the high throughput, effectively giving us four saleable products,” Amato said.
The Elmsford recycling facility is situated close to the Hudson River about 15 miles north of New York City, and receives demolition and asphalt waste from the city for crushing and screening, ready for re-use in the city and its environs. It’s big business for Thalle, with contractors paying a tipping fee to deposit materials, which are turned into high-value secondary aggregates.
Versatility
According to Amato, the Extec S-7 is the ultimate large production screen. Based around the Doublescreen concept, it is designed for the aggregate producer who requires large throughput, true mobility and clean gradings.
It has two 10-ft. x 5-ft. screen boxes each with three decks, allowing for a more concentrated screen. Each box has its own separate drive and can be independently angled to suite the screening process. An extra side conveyor enables the S-7 to produce up to five products simultaneously.
The primary box consists of three 10-ft. x 5-ft. decks, with the secondary box consisting of three decks, with the top and middle being 10-ft. x 5-ft., and the bottom being 8-ft. x 5-ft. This provides the customer with a 20-ft. x 5-ft. top deck, 20-ft. x 5-ft. middle deck and 18-ft. x 5-ft. bottom deck.
Long, chevron-belted side conveyors can feed directly into a cone crusher or to a stockpile, or both. In addition, the S-7 has the longest tail conveyor in its class, the manufacturer says, for greater stockpiling capacity. Fast-running belts can accommodate exceptionally high rates of production. The S-7 features a strong chassis design for the most demanding of environments and long tracks that provide a stable screening platform.
“We’d rented Extecs in the past, but decided to buy when the S-7 was launched. It’s big enough to do what before a number of machines had done for us at our operation,” Amato said. “The thing about this plant is that it allows us to do a lot with one machine. We can produce a variety of grades of stone — from 3/8-in., through 3/4-in., to 9/16-in. and fines.”
Extec Screens and Crushers, www.extecscreens.com
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