INDIA 2018

Best of Germany 2014 - Mining Equipment and Mining Technology

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VDMA 27 2018 • VDMA MINING SUPPLEMENT holders are mounted onto the drum in a job-specific layout. Number of picks, pick spacing, and pick design are a few of the parameters that are designed to the conditions on the mine site and desired project deliveries, e.g., particle size distribution or cutting rates. In the development of the cutting drum for the New Acland proj- ect, the engineers had to design the Surface Miner to cut both coal and rock partings. On the direct-loading machine, the tool holders are mounted in a helix layout to pull the material toward the mid- dle of the drum. The cutting depth can be adjusted to follow the coal-rock interface, down to 830 mm. A scraper is located behind the cutting drum and from there the material is transported onto a primary conveyor, which transfers the material onto the discharge conveyor that slews 180° with an adjustable height. It can load haul truck easily and efficiently while minimizing dust emissions. The conventional mining system consisted of dozers and a wheel loader for loading rock and coal into the 130-mt to 190-mt haul trucks. This dozer-assisted, truck-and-shovel operation has been well developed over the years at New Acland. The dozer oper- ators have extensive experience and achieve good loss and dilution figures. New Acland, however, wanted to improve recovery and fur- thered reduce coal loss and dilution. A change in the mining process can be risky and uncertain so New Acland opted for a four-month trial. For the successful implementation of new technology, it is important to take a whole-of-process view, which requires cooperation between the divisions. KPIs of the Surface Miner trial were not only limited to productivity and mechanical availability, but also addressed impacts across the whole process chain. An example is the particle size distribution (PSD), particularly fines generation. Surface Miner = Mining made easy. www.wirtgen.com/mining A WIRTGEN GROUP COMPANY WIRTGEN GmbH · Reinhard-Wirtgen-Str. 2 . D-53578 Windhagen . T: +49 26 45 / 131 0 4200 SM: WIRTGEN Surface Miners cut, crush and load material in a single operation. WIRTGEN is the only manufacturer to cover a performance spectrum of up to 3,000 tons per hour with direct loading by conveyor belt. This high output is based on high- performance cutting technology and a wealth of experience acquired in three decades of application technology. Take advantage of innovative solutions from the technology leader. www.wirtgen.com New Acland participated in a four-month trial that compared the use of a Wirtgen Surface Miner against its traditional mining techniques and realized several benefits with the new system.

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