Crushing for that Special Shape
The size and shape of crushed rock is important when meeting the specifications of a particular job. This line up of tertiary crushers can help make it happen.
by Kerry Clines, Senior Editor
Impactor with third crushing chamber
Stedman says that the Crush Plus Grinding Path System on its Grand Slam secondary horizontal shaft impactor creates a third crushing chamber to maximize one-pass product yield, minimize oversize, improve material soundness, and produce highly cubical product. The impactor series uses high-chrome metallurgy to increase wear life and reduce metal replacement costs.
Stedman’s “H” Series Multi-Cage Mill is available in four sizes up to 250 tons per hour with two-, four-, or six-row design. The company says the mill can crush, grind, pulverize, blend, and mix a variety of materials — wet, sticky, or dry. Air cannons are mounted at the intake and discharge to help prevent wet, sticky material buildup; heaters are installed on the grinder housing to help retard wet material buildup.
FLSmidth Excel LLC says its Raptor XL400 cone crusher is a high-performing, cost-effective, versatile solution for aggregate operations and is ideal for use following a jaw crusher to produce usable and salable aggregate for asphalt chips, road base, railroad ballast, and more. The crusher features a 52-inch-diameter head, a one-piece cast steel mainframe, advanced overload sensing technology to detect crushing force overload, and “fail safe” hydraulics to protect the machine from mechanical overload.
Uses rock to crush rock
Metso Minerals says its Barmac B-Series VSI (vertical shaft impactor) is unique due to its crushing process — it uses the rock fed into the machine to crush itself. The company says it produces high-quality cubical-shaped aggregates that meet all major construction specifications — particularly road base, top-dressing chip, concrete and asphalt aggregates, and manufactured sand.
Universal Engineering says its “NGS” Impactor offers more cost-saving features than any other horizontal shaft impactor on the market today and features versatility in function and ease of maintenance. It also allows for an adjustable third curtain (apron) to be added to the field, and offers adjust-on-the-fly capability, according to the company.
Terex Cedarapids says its new, quick-adjust, 200-horsepower RC45 III ElJay Rollercone is a high-production cone crusher with field-proven, high-efficiency roller bearing design for low cost per ton of operation. It features a hydraulic thread adjustment system for quick and easy setting changes. The company says interchangeable crushing chambers allow easy conversion from standard to fine configurations with a simple liner change.
Impactors with vertical gear drive
Terex Canica vertical shaft impactors now have chassis-mounted vertical gear drive units to eliminate the need for hydraulic and quarter-turn drives when coupled with a diesel engine. Along with better horsepower utilization, the company says it allows easy above-deck access to v-belts and drive sheaves. The TXC 2050, 2300, and 2350 have production capacities of up to 600 tons per hour with feed sizes of up to 8 inches.
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