Engineering & Mining Journal

JAN 2019

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52 E&MJ • JANUARY 2019 www.e-mj.com EQUIPMENT GALLERY Wirtgen reported more than two dozen of its surface miners are deployed to bauxite mines in Guinea, West Africa. The machines cut and crush the ore and pile it in a row alongside the ma- chine path, creating high stockpiles for a superb bucket fi ll, Wirtgen reported. The machines leave behind a level surface that can serve as a stable roadway for hauling, it reported. The most commonly used models in Guinea are the 2200 SM and the 2500 SM. The former is described as compact and pow- erful, able to cut rock with unconfi ned compressive strengths of up to 50 megapascals (MPa). It has a 2.2-m-long cutting drum and a 708-kilowatt (kW) engine. The average 2200 SM in Guinea moves 1.25 million tons of bauxite per year, Wirtgen reported. The 2500 SM, able to mine rock with an unconfi ned compressive strength of 80 MPa, offers a cutting width of 2.5 m, and is powered by a 783-kW engine. The average 2500 SM in Guinea moves 3 million tons per year. Wirtgen surface miners are offered in a variety of performance classes for the selective mining of materials such as coal, limestone, bauxite, gypsum, salt and phosphate. www.wirtgen.de Crusher Offers Class-leading Productivity Terex Corporation subsidiary EvoQuip announced it will promote its Cobra 230 Impact Crusher at World of Concrete 2019. The crusher provides class-leading productivity, unmatched versatil- ity and excellent fuel effi ciency, the company reported. Quick set-up times, simple intuitive operation and ease-of-transport distinguish the machine, it reported. Key design features in- clude widening sections for optimal material fl ow, excellent under-crusher clearance, the short distance from the crusher discharge to the magnet, and the ability to lower the product conveyor while running. Ground-level access to the engine, hy- draulics, service and refueling points facilitates maintenance. A compact footprint makes the Cobra 230 easy to transport. www.terex.com Heaviest-in-class Stacker Superior Industries, Inc., debuted two new tracked conveyor models, the 75-ft tracked stacker and an 8-by-16-ft tracked feed hopper. At 34,000 pounds, the stacker will be one of the heaviest models available in its class. It is capable of handling up to 907 mt per hour (mt/h), while hydraulic power controls the tracks, folds, and discharge height. Cross-bracing designed and built into the undercarriage ensures structural rigidity and stable track travel. The feed hopper processes up to 725 mt/h from an 8-yard 3 , reinforced hopper. A bi-directionally dumping grizzly is equipped with adjustable grizzly bars and can be tilted at one of fi ve preset angles. The hopper's drive and backstop are hydraulically-controlled. Both the stacker and the feed hopper are equipped with Superior conveyor components. www.superior-ind.com Railway Tie Change Attachments KINSHOFER released the RBS, RBS20 and RBS20HPX, rail- way tie/sleeper changer attachments for effi cient railway main- tenance and repair. The attachments can be used with 12- to 24-ton rail excavators to quickly exchange existing concrete and wooden ties without disrupting the track. The attachments' large shields allow operators to easily clear ballast from the tracks, and after the new tie is placed, quickly back- fi ll and level the bal- last. The RBS comes standard with a Nordic s-style coupler adapt- er. The attachment is capable of continu- ous 360° rotation and multi-directional tilting up to 55° when paired Surface Miners See Demand, Use in Guinea

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