VDMA

Germany 2019

Best of Germany 2014 - Mining Equipment and Mining Technology

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VDMA 15 2019 • VDMA MINING SUPPLEMENT eventually be replaced with units on the machine, but we don't want the operator to be overwhelmed with data," Lukowski said. "The ser- vice people should also have onboard functionality. With their key card, they can access more data than the operator." When it comes to data, Lukowski said he routinely encounters two types of customers — the ones that say they are interested in all the data and another group that only wants actionable data. "Our customers should not have to invest their time in deciphering the data," Lukowski said. "Using intelligent algorithms, we can pro- vide the data to them in a more organized format. They can have all the data if they want it. We are very open in the regard, but we believe there is more value in actionable data. Knowing the oil tem- perature was within limits for the last four weeks wouldn't be useful. Knowing when the oil temperature increases to over and above the limits, however, would be important." Liebherr continues to build the large T 284 and T 264 haul trucks in Newport News, Virginia, USA. "An important haul truck project for us is trolley assist," Lukowski said. "We have diesel-electric trucks and they can be equipped with trolley assist. We have T 284s oper- ating with trolley assist in Zambia and Panama. We also have some trolley assist interest with the T 236 haul truck too." Looking toward the future, Lukowski marvels at the accelerating pace of technology-related improvements, especially with the electric drives and the sensors used in digital systems. "If we can improve the performance of excavator and lower the operating costs for users, they can consider higher stripping ratios," Lukowski said. "Drones are be- ing used extensively in agriculture to improve safety and productivity and those technologies will likely influence the mining business. The drones could be used to better assist the truck loading process." Meanwhile, Liebherr continues to strengthen its footprint in the mining business. The company's facility in the Kuzbass has been completed and the company has made a significant investment in its facilities in Western Australia. Last year, they built a small sup- port shop in Panama for haul trucks. Liebherr has more project-re- lated investments planned for 2019. BWEs Offer Continuous Excavating, Conveying and Stockpiling Bucketwheel Excavators (BWEs) are continuous mining machines designed for the extraction of overburden (semi-hard material, such as clay, sand, gravel, marl, etc.), lignite or hard coal with an output of up to 60 million bank m 3 /year. These gigantic machines represent a true mechanical endeavor and they have steadily evolved since they were launched in the early 1920s. TAKRAF, a Tenova company and leader in the global mining, bulk handling and minerals pro- cessing industries, is one of the world's major players within this technology space and boasts a long tradition of delivering BWEs for specific material conditions. A bottle of champagne broken against the bucket-wheel for good luck was followed by the applause of the miners and the technicians participating in the celebration. On November 17, 2017, TAKRAF BWE SRs (K) 2000 No. 2147 resumed operations, after a comprehensive refurbishment process at a coal mine in Kazakhstan. This ancient ritual is usually practiced in occasion of the launching of vessels, but it has also become a tradition for the commissioning of refur- bished BWEs. In fact, such a machine deserves to be celebrated as it represents a true mechanical endeavor. The gigantic size of these machines is self-explanatory if one considers their application. For the refurbishment project in Kazakhstan, TAKRAF employees based at the Ekibastuz Service Office supervised the entire con- struction phase, with active support from colleagues in Germany who traveled to the site for final assembly of the BWE, balancing of the excavator, and the commissioning of electrical and automa- tion components. The machine, originally built in 1985, underwent a comprehensive refurbishment process lasting several months, with TAKRAF supplying several components manufactured at its own Lauchhammer workshop in Germany, numerous spare parts and almost all of the required electrical components. This 33-year-old machine is a testament to the longevity of these machines and their technology. In the 1970s and early 1980s, TAKRAF delivered 13 BWEs, type SRs (K) 2000, for the coal deposits found in the Ekibastuz region of Kazakhstan. Almost all of these machines were designed for hard overburden, interburden and hard coal, with uniquely designed buc- ketwheels, with 32 buckets mounted on an 11-m wheel, suitable for material up to UCS 40 MPa. By using an extremely high number of buckets combined with a maximized cutting speed, TAKRAF man- aged to create a smooth operation under hard coal conditions. These machines — boasting a distinctive TAKRAF design — have been operating with continued success for more than three decades. BWEs can be employed across a wide-variety of commodities covering a wide range of capacities, with TAKRAF offering BWEs with rated capacities ranging from 500 to 20,000 m 3 /hr. In most applications, the BWE is connected to a belt conveyor system or a cross-pit spreader. Most BWEs are designed to fulfill a client's specific requirements and incorporate various solutions according to their unique applica- tion, including actual site conditions. As a result, either compact or large-scale BWEs can be employed, depending on the required cutting height, block width and length of the working bench. Com- pact excavators are most suited to mines with short benches and harsh, irregular operating conditions; whereas large machines are more suited to working in flat mines with unconsolidated rock, large benches and regular mineral deposits. Excavator design always aims to meet specific demands and requirements of the project in terms of optimization, standardization and maintenance. TAKRAK recently refurbishes this 33-year-old BWE in Kazakhstan.

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