Crushing with Impact
Automatic, hydraulic cylinder
Grasan’s largest pit- or road-portable primary impact crushing plant, the KRH1515, can be configured for concrete/asphalt recycling (side discharge) or crushing limestone (end discharge), providing reduction ratios as great as 30 to 1 in a closed circuit. The plant features the Hazemag APPH impact crusher with a fully automatic, hydraulic cylinder system that provides increased crusher capacity up to 600 tons per hour, smoother operation, and more uniform products. Crusher adjustments also have been simplified so no tools are needed. The crusher inlet is 45 inches high ⎯ 10 inches greater than previous models ⎯ to handle larger sizes of incoming material, and a hydraulic moveable inlet base helps clear jamming and bridging. The hydraulic inlet hood is secured with wedge pins for easy opening and closing. To reduce users’ spare parts inventories, side liners in the crusher have been reduced from seven to three standardized shapes and all multi-blocks have been made interchangeable. The crusher’s grizzly bypass chute makes it easy to keep or reject undersize material, according to the company. It is available with diesel or electric power, and the road-portable model includes a skid-on, skid-off hopper and six independent hydraulic support legs for easy set-up and teardown without a crane.
Continuous flow design
The 6500LP Crushing Plant from Lippmann features a flow design that doubles production when compared to competitive plants with the combination of a larger feeder, impact crusher, and screen deck, according to the manufacturer. The plant’s typical product flow has been re-engineered into a continuous flow design that allows rebar to bend and material to discharge smoothly with the rotation of the rotor for uninterrupted production. This flow design is able to handle rebar as long as 10 feet. A heavy-duty pan feeder under the crusher prevents conveyor belt damage. The plant’s on-board conveyors mean that only two pieces of equipment — instead of four — need to be moved to a job site, and its relatively small footprint provides flexibility to confirm to site constraints.
Maximizes one-pass product yield
The Mega Slam Primary & Grand Slam Secondary Horizontal Impact Crusher from Stedman features two new product developments — the Crush Plus Grinding Path System and the Max-Yield Automated Apron Adjustment System. The Crush Plus system creates a third crushing chamber to maximize one-pass product yield, minimize oversize material, improve material soundness, and produce a highly cubical product. The Max-Yield maintains gap-setting adjustment for aprons and the grinding path and is controlled by a Programmable Logic Controller (PLC) that is said to improve one-pass product yield and reduce product changeover downtime.
Patented ‘center-pull’ wedge system
The 1300 Series Horizontal Primary Impact Crushers from Terex Cedarapids — IP1313 and IP1316 — feature an enlarged feed opening (43-1/4 by 64-3/4 inches for the IP1316) capable of handling large, irregular-shaped feed materials. Both crushers in the series have heavy “monoblock” primary plates, reinforced secondary breaker plates, hydraulic-assist adjustment systems, and high-inertia rotors with a patented “center-pull” wedge system — all of which have been designed for high capacity and large-feed size. The low-profile design allows for crusher installation as well as both wheeled and tracked machines. Within the series itself, the IP1313 and the IP1316 process a high-tonnage of material, provide “excellent” control over particle shape and size, and process myriad types of materials, including those for recycling applications, according to the company. The series is available in two sizes and with two crushing chamber configurations and with two- or three-bar rotors that come in 5-inch, one-piece cast impeller bars made from either manganese steel or tool steel. Other standard features include replaceable feed plate liners; a left-hand drive; spring-loaded secondary apron; replaceable 3-inch thick high-chrome secondary apron lines; a 5 horsepower electric/hydraulic power unit; and a flanged feed opening that accepts feed adapters. Optional equipment includes a V-belt drive; a right-hand drive; two-bar impeller rotor; tool steel secondary apron liners; bolt-on feed adapter with chain/rubber curtain; a 53-inch high-inertia sheave; and several drive-sheave options.
Screen Machine Industries
Fully remote-controlled operation
Screen Machine Industries, Inc. has added the 5256T tracked, portable impact crusher to its product line. It is a fully remote-controlled operation featuring standard Caterpillar tracks and its C-15 ACERT Tier 3 479 horsepower diesel engine as well as a 52- by 56-inch horizontal impact crusher with a 56- by 38-inch feed inlet opening. The crusher also featured a patented split-housing design that allows for blockage clearance during operation as well as making maintenance easier. A wireless remote control triggers the lifting lid, which allows oversized material to pass through the crusher without stopping.
Construction Equipment Co.
Hydraulic self-adjusting clutch
The 102×115 (40 by 45 inches) Track Mobile Impactor from Construction Equipment Co. (CEC) has a hydraulic self-adjusting clutch with push-button startup. The crusher weighs 68,000 pounds, and a magnet adds 3,100 pounds to the weight. The 40-inch by-12-foot feeder features 60-inch long grizzly bars, bolt-in wear liners, bolt-in adjustable bars in 1-1/2 to 3-3/4 inches, an enclosed dual-shaft eccentric, drive mounts on the eccentric housing, an under grizzly reject chute, and a grizzly side reject chute. The system has dual-adjustable curtains, replaceable chute liners, and a balanced rotor. There are three rows of blow bars, with 830 pounds of blow bars per row, as well as top-loading blow bars. Other features include a hydraulic debridger, a 4- by 8-inch backing bar with replaceable seats, a hydraulic hood opening, fixed exit curtains, and wind stripper bars.
Single-wedge hammer locking system
The Sandvik Impactmaster P&S Series from Sandvik Mining & Construction has a hammer locking system that is composed of a single wedge, bolt, and spring washers at each locking point, which firmly secures the hammers both vertically and horizontally. The crusher also features a self-sharpening leading edge, a rotor design that delivers high inertia, and an optimized modular concept for compatibility with all of the company’s 16 primary and secondary crusher models. Several options are available for the crusher, including a motor-driven hydraulic power pack for curtain-setting assistance and crusher topshell opening; manganese, chrome steel, and/or chrome iron for hammers and liners (depending on the application); a jib crane for removing and replacing hammers; and a re-circulating chute, which enables a P series crusher to operate in a closed circuit. According to the manufacturer, this crusher series is the most advanced line of impact crushers available and have a high-reduction ratio and a high-quality cubical product.
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