Crushing with Impact
Crushers are a vital part of any operation so choosing the right one is critical. Here’s a guide to the impact crushers on the market today to help guide your decision.
by Therese Dunphy, Editor-in-Chief
Sculptured rotor with high inertia
Telsmith Inc.’s new PA6060 Primary Impact Crusher, which will be on display at next month’s ConExpo-Con/Agg trade show in Las Vegas, is designed as a primary crusher for either quarried stone or recycling concrete. The Andreas-style impact crusher has a 59-inch, solid-type sculptured rotor that combines high inertia with the ability to handle up to a 40-inch feed. The oversized 220-millimeter-wide series roller bearings are larger than industry standards, which assists in extending service life beyond the typical timeframe. Adjusting the crusher’s apron setting can be easily done with handheld controls, and an automated apron reset feature simplifies crusher operation. Hydraulic controls on the crushers are equipped with position sensors to provide “dependable relief” when encountering tramp metal, according to the company. A hydraulic tilting plate on the impactor provides operators with an easy way to clear amp-ups and bridging — and handheld controls tilt the plate for quick and safe clearing. Additionally, heavy-duty, mono-block aprons provide long life and are interchangeable throughout the crusher. The impactor can be mounted on portable plants or into fixed locations with truck-dump feed arrangements.
Lowest cost-per-ton for tough applications
The Eagle Crusher 1600-69, which is part of the company’s UltraMax Series, is said to be highly versatile and self-contained and to produce cubical product at a lower cost-per-ton in tough aggregate and recycling applications. The crusher features a 13-ton sculptured, three-bar rotor made of solid steel and has a fully lined hopper and 68-inch by 20-foot feeder. The impactor weighs 61,000 pounds and has a plant weight of 77,800 pounds in transport mode, 170,000 pounds complete. The travel width is 11-feet, 11 inches and travel height is 13 feet, 5 inches. Rotor diameter and width is 56 by 68 inches. The feed hopper capacity is 27 cubic yards.
Two machines in ones
Kleemann Inc. USA’s Mobirex MR 130 Z mobile impact crusher is a high-capacity machine that is two machines in one — a crusher and a screen box on one chassis. The high-capacity machine enables limestone, reinforcement demolition concrete, tiles and bricks, and reclaimed asphalt pavement (RAP) to all be processed by this hydraulically driven impact crusher to produce a high-quality, graded product. The crusher’s variable rotor speed and impact rocker adjustment ensure uniform and product quality when variable or non-homogenous feed material is used, according to the manufacturer. The feeder opening is 51 by 35 inches, and the crusher can accept material up to 43 by 2 inches in size. The maximum throughput is 440 tons per hour. The machine is closed circuit and has a fully independent pre-screen.
Large reduction ratio
The I-1312 impact crusher from Terex Finlay is a multiple-speed impact crusher designed for primary and secondary crushing of concrete/asphalt rubble and limestone. It features a high throughput and large reduction ratio as well as a rapid setup, according to the manufacturer. The I-1312 uses a high-performance Cedarapids 5048LP impact crusher with a large discharge opening and standard three-bar or four-bar configuration. Other standard features include a hydrostatic drive and advanced electronic control system, hydraulically assisted apron setting, grizzly feeder with integral pre-screen, selectable discharge to bypass or main conveyor, and dust suppression on the main conveyor.
The crusher’s hopper capacity is 11.7 cubic yards and has hydraulically folding sides, 5/8-inch hardox sidewalls, and tapered grizzly apertures. It also has an integral 5-foot by 4-foot screen, heavy-duty counter rotating shafts, oiled bearings, and an advanced CANBUS-compliant control system that has five operating modes — track, manual, automatic, configuration, and language — with a menu-driver user interface. A detachable, dog lead control for tracking or optional full-function radio remote also is available. Other options include a bypass conveyor, overband magnet, belt weigher, extra dust cover for discharge conveyor, hydraulic water pump, recirculation conveyor, tracked or wheeled undercarriage, and a CAT C13 (Tier 3) engine.
Produces multiple material sizes
The Andreas Series horizontal impact (HSI) crusher from KPI-JCI can accommodate two-, three-, or four-blow bar configurations. They are equipped with the company’s maximum performance rotor, providing operators with the flexibility of an open configuration. An easily adjustable apron provides quick setting changes, and the replaceable liners protect the crushing chambers. This series has production capacities up to 450 tons per hour.
The company’s New Holland Series HSI crushers feature models with feed openings that range from 38 to 50 inches to 60 to 64 inches. The rotor has easily adjustable impact bars that provide quick-setting changes appropriate in multiple aggregate and recycling applications. The New Holland Series has production capacities up to 1,019 tons per hour and is available in stationary and portable configurations. Wear-resistant manganese sleeves help to protect against abrasive wear, and an adjustable impact bar provides the flexibility to produce multiple material sizes.