Best of Germany 2014 - Mining Equipment and Mining Technology

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28 VDMA 2016 • VDMA MINING SUPPLEMENT Liebherr Aerial: The Liebherr R 9200 loads a 140-mt haul truck with its 12.5-m 3 bucket. ment." Starting in January 2015, off-highway engines in North America were subject to EPA Tier 4 emissions standards. The Series 1600 is Atlas Copco's first Tier 4 final engine. The Series 1600 en- gines meet Tier 4 regulations without exhaust gas after-treatment. The innovative engine is designed for state-of-the-art diesel combustion. Its technology package includes exhaust gas recirculation (EGR), a high-pressure common rail fuel injec- tion system and two-stage turbocharging, all of which enable combustion with very low oxides of nitrogen (NOx) and particulate matter. As the industry's only Tier 4-capable engine without after-treatment in its class, the Series 1600 has no particulate filter, no diesel exhaust fluid, no SCR catalytic muffler. This makes the maintenance needs lower compared to engines with af- ter-treatment systems. Installation is easier, as well. MTU has ensured that the engine's EGR components are integrated in a very compact way so the size of the engine and the exhaust piping are not significantly affected. The compact size of the Series 1600 made it easier for Atlas Copco to integrate the engine into its blasthole drill rigs. "For Atlas Copco, no after-treatment greatly reduces engineering costs. For the customer, it means lower operating costs and less downtime compared to engines that use after-treatment," said Bennett. Fuel consumption is also optimized as a result of the Series 1600 technologies, such as common rail fuel injection and two-stage regulated turbocharging. While the engine is still in its testing phase, fuel economy statistics are not available yet. The operators of the Series 1600-powered DM45 at Wharf mine are positive about the new engine, too. Considering the long hours the machine is in operation, engine noise can be an issue. Hydraulic pumps and air compressors run tirelessly. Fortunately, the advanced technology of the Series 1600, along with Atlas Copco's noticeably quieter. The Series 1600 represents the latest in MTU technology. Engineered for the future, the engine is ready to meet the demands of tighter emissions regulations without complicated modifications. Any operation that powers their machinery us- ing these engines stands to benefit from MTU's forward-thinking engine concept. Atlas Copco has struck gold with the Tier 4-capable Series 1600. So far, the Wharf mine's blasthole drill has reached 3,000 hours of operation and it's still going strong. After a year of testing, updates and calibrations, the engine is ready for widespread production. In June 2015, the Wharf mine received a second DM45 equipped with the Series 1600. Soon, other mining sites in North America will put the Series 1600 engines to work. Maximizing Coal Recovery by Minimizing Fines Most coal mines measure the particle size distribution (PSD) of their plant feed to obtain information about the suitability of the feed for their process, especially regarding the fines content. But few mines know where these fines come from ex- actly, and few still actually measure the fines content at the face to compare it to the plant feed data and to optimize the processes in between—although optimizing the fines content of the run-of-mine (RoM) coal offers numerous savings and benefits. The breakage of coal occurs throughout the process chain, from extraction at the face to the point where it is used. Some of this breakage is intentional, e.g., extraction and crushing, and some is unwanted, occurring when the coal is trans- ported, stockpiled, sized or washed. Generally, breakage behavior greatly depends on the geology, but mining technology offers a chance to affect the amount of fines generated along the process chain. It is of the utmost importance to use this chance and reduce the level of fines to the greatest possible extent. has conducted several large-scale field tests on material degradation recently. It was found that surface miners offer significant advantages when it comes to reducing fines. Surface miners are crawler-mounted mining machines with a rotating cutting drum for rock penetration mounted at the center of gravity. This ensures that the full machine weight of the miner can be transformed into rock penetration force. The cutting drum transfers the material onto a conveyor belt from which it is directly loaded onto a dump truck. The Wirtgen surface miner mines layer by individual layer down to the designat- ed depth. The cutting depth can vary according to the seam thickness. Even seams as thin as 10 cm can be mined and precisely separated from the interburden layers above and below it. SOME THINK LONG-DISTANCE TRANSPORT IS INFRASTRUCTURE- INTENSIVE. WE THINK DIFFERENT. Transporting materials from remote locations has traditionally required signifi cant infrastructure investments in road or rail links, vehicles, personnel and fuel. BEUMER off ers an economical, effi cient and environmental alternative – long-distance overland conveying. This gives you a dedicated, around-the-clock transport link at the fraction of the cost of infrastructure development. The reduced noise and air pollution minimises environmental impact and improves personnel safety. Add to that a high degree of design fl exi bility and customisation and you can see why overland conveying makes a big diff erence to operational effi ciency and environmental protection. For more information, visit www.beumergroup.com

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