Aggregates Manager’s Top 25 RollOuts for 2008
Also new: more powerful exhaust brakes and retarders, and improved cooling systems.
Telsmith, an Astec company, introduced a new line of inclined vibrating screens at ConExpo-Con/Agg. The Vibro-King TL series replaces the Vibro-King and Specmaker lines, boasting longer service life, reduced maintenance requirements, and lower operating costs. The new screen features a TL shaft assembly with a revolutionary “Never-Wear” seal design that eliminates contact seals, reducing maintenance and extending service life. All TL shaft assemblies use wide-series-bearing and polished-shaft-bearing journals for longer life.
Large, versatile crusher
Kleemann introduced the impactor-based Mobirex MR 130-Z. The unit is a closed-circuit machine with a fully independent two-deck prescreen before the primary impact crusher box. Material is dropped onto a feeder, scalped over the independent pre-screen, and through an onboard screen after the crusher, where oversize is recirculated back into the crusher. Kleemann says it is two machines in one: a crusher and a screen box.
Uses half the horsepower
The Aggre-Dry FMW (fine material washer) Screen from GreyStone washes and dewaters aggregate material, combining a fine material screw and dewatering screen that the company says produces sand and gravel with a moisture content as low as 8 to 13 percent, by weight, while using less than half the horsepower required to process the same tonnage of spec product using a traditional screen/cyclone system. The dewatering screen features a 0.25-mm screen that reduces the amount of material that can fall through the screen. The feed from the screw allows the material to build to a bed depth of 14 inches on the screen, squeezing additional moisture from the sand as the vibratory motors move it along the length of the screen cloth, further reducing moisture content.
Retrofittable VSI rotor
Sandvik Mining & Construction’s new Sandvik Hurricane rotor is said to offer breakthrough benefits in VSI autogenous rotor design. With four new rotor and wear parts design patents pending, major improvements include the following: increased rotor throughput of up to 30 percent for the same power draw; increased uptime and availability due to reduced overall maintenance; fewer wear parts required; increased commonality of parts that decreases stocking requirements; and decreased vibration levels from the new design.
Dewaters plant sludge
McLanahan Corp. obtained exclusive rights to market Matec Machinery’s HPT Plate and Frame Filter Press in the Americas. The company says Matec’s use of high pressure technology (HPT) allows the press to work at pressures of up to 300 pounds per square inch and handle even the most difficult, high-clay-content sludge. The Matec Press is said to function without use of flocculants and does not require a full-time operator to monitor feed density, flocculant dosage, or belt conditions. McLanahan says the unit also eliminates the need for settling ponds.
Innovative housing and rotor
Stedman rolled out its new, patent-pending V-Slam VS-88 vertical shaft impactor. The crusher features innovative housing and rotor designs; an easy-access, low-profile, split-swing lid; higher operating speed for finer grinding; and capacities up to 500 tons per hour.
Powerscreen introduced the new Chieftain 2100X as an upgrade of its popular Chieftain 2100. Available as a two- and three-deck unit, it has 14-percent greater bottom deck screen area to provide greater screening capability. The company says it also has greater stockpile capacity and sets up ready to run in less than 30 minutes.