Crushing with Impact
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.
Hydraulic apron-locking mechanism
The Terex Pegson 1412 Trakpactor plant features a horizontal impact crusher with hydraulic controls, which the company says makes more uniform products, and the latest programmable logic controller (PLC) CAN BUS control system to automatically regulate the feed to the crusher, based on the engine load. The plant is suitable for crushing concrete and asphalt rubble, brick, and medium to hard limestone. The impactor uses a hydraulic apron-locking mechanism with overload protection and automatic reset, providing consistent product size and added protection against tramp metal. The crusher also opens and adjusts hydraulically, and it is fitted with a hydraulic tilting feed plate to improve blockage clearance. The feed opening is 32 by 54 inches, and the rotor size is 48 by 53 inches with reversible steel blow bars that are held together with a simple clamping system. Ceramic blow bars are optional. Maximum feed size is 24 by 20 by 20 inches cube or 48 by 40 by 20 inches slab. The standard hydraulic folding feed hopper has over-center struts and a wedgelok system and is a grizzly feeder with a 54-inch by 14-foot underscreen.
Hydraulically adjustable feed plate
Universal Engineering’s MaxCap Primary Impact Crusher can crush up to 1,400 short tons per hour and boasts a hydraulically adjustable feed plate; interchangeable back and top wall castings; a hydraulically adjustable breaker plate that automatically maintains its position; and a heavy-duty disc style rotor with quick-change hammers. The crusher offers the capacity of a New Holland style crusher with the ease of operation and maintenance of an Andreas style machine, according to the company. The standard design of the MaxCap features the following: heavy-duty fabricated steel construction; an upper section of the housing that retracts hydraulically for easy access to the interior of the impactor; hydraulically adjustable feed plate and breaker plate with automatic positioning; a fabricated disc-rotor assembly with quick-release hammer locks, and a rotor lock pinned from the crusher housing into the rotor body. The crusher also has top-loading, reversible hammers with protruding leading edges, interchangeable abrasion-resistant alloy steel liners to protect the interior walls of the crushing chamber, and large access doors on the side and back of the crusher. Optional equipment includes an electric motor, jib crane, crusher sheave, drive guard, motor sheave, V-belts, and feed chutes designed for specific applications.
Re-circulation system produces maximum throughput
Extec Screens & Crushers’ I-C13 impact crusher features a re-circulation system that is able to produce maximum throughput when creating a highly useable product, in a single pass. The crusher can work through the high temperatures and masses of dust and dirt, without being prone to failure, according to the company. The system’s optional re-circulation system ensures that a consistently high-quality product is produced, reducing the need for further processing steps. It also has the option of a bogie transport system that enables simple movement over any distance, without the need for a low loader. A compact, heavy steel web and flange construction allows for improved strength and reliability, and a Caterpillar C-13 industrial engine ensures maximum power, even in the harshest conditions. Key design features of the chassis, such as the wide-discharge point between the crusher and main conveyor, allow for reductions in any blockages while facilitating machine maintenance and cleaning. The use of hydraulic lifting legs allow for simple track and underside maintenance.
Engineered for mobile applications
Metso Minerals has developed new Nordberg (NP) Series impact crushers — the NP1110M for the LT1110(S) and NP1213M for the LT1213(S) crushing plants — and have been engineered specifically for mobile applications. The crushing capacity for the 1110M and NP1213M is 260 tons per hour and 350 tons per hour, respectively. Both impact crushers feature a unique combination of heavy rotor design, wear material, and crushing chamber design that result in improved capacity, product quality, and a reduction in operation and wear costs, according to Metso. The NP1110M features a 41- by 31-inch crushed-feed opening, a maximum feed size of 23.6 inches, and it weighs 20,240 pounds. Its recommended speeds of operation range from 450 to 600 rpm.
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