FLSmidth’s wheel-mounted XL300 and XL400 cone crusher plant options include rear discharge and rear-feed side discharge. Both crushers can be configured with two- or three-deck horizontal screens that are 6, 7, or 8 feet by 20 feet, which provide open-circuit crushing and screening. Hydraulic run-on jacks are available as an option to level the plant after it is pulled on site. A high pivot point and large crushing stroke offer better crushing action throughout the crushing chamber. An active feed opening creates better end-product shape. The crushers also employ “fail safe” hydraulics through an internal relief valve within the dual-acting tramp release cylinders.
Powerscreen’s new 1500 Maxtrak is the largest crusher in the company’s line. The company says the plant can accept an all-in feed from a primary crusher to produce up to 950 tons per hour of material. Features include hydraulic overload protection, hydraulic crusher setting adjustment, excellent product shape, a high reduction ratio, an efficient crusher direct-drive system, a large feed hopper complete with metal detector, and a contaminated material purge facility.
The new Terex Cedarapids CRC380HLS portable crushing and screening plant is designed for constant choke feeding. Its high-lift screen and cone hopper overflow system allow a large head of material to build up, force-feeding the cone crusher. The large cone hopper and overflow chute are said to buffer feed variations and prevent material from backing up to the screen, allowing production rates of up to 1,200 tons per hour with no need to throttle back. The unit’s 6- by 20-foot TSH6203 triple-deck horizontal screen has a blending gate system that allows center and bottom decks to be combined in 25-percent increments. Two large, 30-inch conveyors discharge up to 44 inches beyond the plant frame on either side. The four-axle configuration and a 3+1 axle option provide portability.
Sandvik says its new QH440 track-mounted cone crusher is designed for mobility, ease of transporting, and quick set-up time. The unit features a CH440 cone crusher capable of producing up to 388 tons per hour. Additional features include a heavy-duty, wear-resistant, hydraulically folding feed conveyor; a dual-coil metal detector; automated material-level feed control; four jacking legs for stability; and a wide selection of optional extras. The unit comes with a choice of six crushing chambers ranging from fine to extra course. Product shape and grading can be easily adjusted by changing the throw.
McCloskey says it designed its new I-54 crusher from the ground up to be the most productive track-mounted impactor in the sub 50-ton, “one-piece move” class. It features a 47- by 53-inch four-bar horizontal impact chamber with a 53.3- by 32.5-inch feed opening to allow for large feed sizes. An 8.9-cubic-yard hopper with vibratory pan feeder flows material over a fully independent 4-foot, 6-inch by 5-foot, 9-inch double-deck inclined pre-screen to remove fines. Crushed material is discharged via a heavy-duty, high-energy pan feeder measuring 4 feet, 6 inches by 6 feet, 7 inches located under the impact chamber, which reduces belt wear and the possibility of belt tears. The crusher is controlled by a PLC. A 430-horsepower C13 Cat ACERT engine supplies the power.
Portable screening plants have come a long way from the early years. Most now offer the ability to separate material into as many as three separate sizes and stockpiles.
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