Engineering & Mining Journal

JUN 2013

Engineering and Mining Journal - Whether the market is copper, gold, nickel, iron ore, lead/zinc, PGM, diamonds or other commodities, E&MJ takes the lead in projecting trends, following development and reporting on the most efficient operating pr

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Page 71 of 171

COMPANY PROFILE-PAID ADVERTISEMENT Established in 1835, McLanahan Corporation has remained a leading provider of custom engineered solutions for mineral processing. Among its capabilities in sizing, feeding, washing, scrubbing, dewatering and classifying, McLanahan provides its customers with an extensive line of crushing solutions. Roll Crushers In the late 1800s, Samuel Calvin McLanahan secured a patent for the first Single Roll Crusher. This first innovation led to the development of a full line of roll crushers including single, double, triple and quad roll crushers. Each McLanahan roll crusher features a heavy-duty fabricated steel frame design, abrasion-resistant steel plate liners and easy-to-maintain parts. Roll elements in these crushers can be designed to meet most any application. Available in a variety of diameters, widths, configurations and surface patterns, designs include a solid, cast shell with through shaft, flanged shaft and solid shell, or segmented design either bolted to a through shaft with hubs or a barrel with flanged shafts. Driven by electric motors and V-belts, all McLanahan Roll Crushers have increased efficiency, high through-put for increased production and low roll speeds that minimize dust and fines. Low headroom and a compact design reduce installations costs. Jaw Crushers The McLanahan Universal Jaw Crusher is typically capable of a 6 to 1 ratio of reduction when used as a primary crusher. Available in many model sizes, each crusher is designed with a deep crushing chamber for optimum nip, as well as a steep toggle angle for maximum crushing force. The heavy-duty pitman and shaft arrangement offers field-proven reliability and extreme durability. Also available is the Universal H-Series Jaw Crusher that features adjust-on-the-fly technology. This technology provides hydraulic clearing when needed, allows an operator to make adjustments while continuing operation and automatically resets when tramp iron passes through the crusher. Primary Impact Crushers McLanahan designs and manufactures four different types of primary impact crushers—the Universal Andreas, New Holland, MaxCap and VersaCap Crushers. Both the Universal New Holland and Andreas provide uniform gradation that can be altered by changing the speed of the rotor. They can handle both dry and wet materials. Although either is capable of offering a high reduction ratio and highly cubical product, each design offers distinct advantages. Universal New Holland Impact Crushers are known for extra-large feed size and output gradations with more finished product from the first stage of reduction, while the Andreas style offers greater mobility, less maintenance and more versatility. McLanahan's Universal MaxCap Impact Crusher offers a large feed opening and an expansion chamber above the rotor similar to the New Holland, but incorporates Andreas features for ease of maintenance and material control. The MaxCap's ability to make upwardto 75% product at the primary combined with the ability to adjust-on-the-fly gives producers the capability to divert material flow between concrete stone and chips in real time. The fourth primary impact crusher available from McLanahan is the Universal VersaCap, which is highly adaptive to portable and mobile platforms. The low-profile limits feed size to 36" (91 cm), but offers functionality, ease of maintenance, versatility and overall durability that are hard to match. This design includes a monoblock primary curtain fitted with reversible wear plates, interchangeable wear liners and a third curtain that can be added in the field. Large inspection and access doors, along with hydraulic-shim adjustment, promote proactive maintenance scheduling and reduce downtime. Secondary Impact Crushers The Universal NGS Secondary Impact Crusher was introduced several years ago and offers the latest features, housing designs and more. The design includes an individual crushing chamber that allows for the optimum output gradation. Notable features of the NGS are the low profile housing, hydraulic-shim adjustment on every curtain, vertical lift hammers with a quick L-block retention system, huge inspection and access doors, and a custom feed chute to conform to existing installations. The Universal NGS Secondary Impact Crusher is also available with adjust-on-the-fly technology. It provides producers with dependable, low-cost fingertip control allowing gradation changes in real time without impeding the flow of material. Industrial Hammermills With numerous models and a wide selection of hammer and grate combinations, McLanahan Universal Hammermill Crusher is capable of providing a custom engineered crusher to fit any application. The heavy-duty, rugged construction of the Hammermill Crusher allows for greater applied forces, achieving higher production rates with controlled product top size and gradation. Each machine is fitted with grates to retain the material in the mill until it is small enough to pass through the openings, ensuring higher rates of suitable gradation. Other notable design features include replaceable, abrasion-resistant alloy side liners; double roll, selfaligning spherical roller bearings; end disc and side frame design that prevents material from collecting between the two; and solid, one-piece forged steel shafts to provide superior strength. More information on McLanahan's extensive line of crushing equipment can be found at or by contacting 70 E&MJ • JUNE 2013

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