Coal Age

SEP 2018

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September 2018 27 screening machines continued use crowbars or screwdrivers and so there are possibilities of injuring yourself." With the 305PS "you don't really need any sledgehammer at all and you can work in quite con fi ned spaces," Larsson said. And "there is no added labor that increases risk when you take it out." Metso offers a monitoring service "where Metso will monitor the wear and give recommendations," Dougherty said. "That entails going out to the site and tak- ing readings on panel thickness, from the feeding end of the screening unit down to the discharge end of the unit, laying it out on a graph, adding time and or tons, what- ever the customer wants, and giving it to them back in the form of a wear monitor — how long did it last over what time at what throughput." All this combines to make the 305PS an "easy proposal" for a customer to ac- cept, Larsson said. "It is a low-threshold entry product in that sense," he said. "It is easy to replace, easy to put on trial, and you don't have to discuss making modi fi - cations to support frames or rails." A Departure From Old Concepts McLanahan Corp. reported that with posi- tive fi eld results received on a MAX Vibrating Screen prototype from an open-pit nickel miner in Sudbury, the company could ex- pand the line by offering the design in more sizes. "Our MAX Inclined Screen has been (there) for an entire season and it continues to meet every expectation," Gerry Mang- rich, global production manager, crushing and screening, McLanahan, said. "With suf- fi cient fi eld-proven experience, we are con- fi dent in the design and our ability to broad- en the scope over numerous model sizes." The line was announced in late 2016 and was pitched as capable of separating coarse feed materials from fi ner material. Market research and the deep expe- rience of company engineers provided the original seed idea for the solution, Mangrich said. "As a major manufactur- er of processing equipment over a broad spectrum of industries, we fi nd a common need, a common link, critical to each in- dustrial market," he said. "That common link is an expanding line of inclined and horizontal screens." The goal was to "introduce a new family of both inclined and horizon- tal screens," Mangrich said. "The MAX screens represent a departure from old concepts, and introduce new features and designs based on the latest technologies." While the screens are now offered in sizes and con fi gurations ranging from 5-ft by 16-ft to 8-ft by 24-ft in triple, dou- ble- and single-deck models, the proto- type was an 8-by-20-ft triple deck with a dual mechanism, Mangrich said. It is fi eld proven, opening the door to further devel- opment of the solution. "The MAX line of screens has proven to meet expectations, but is still in its early stages," he said. "The encouraging feedback is what drives us to achieve new goals." MAX Vibrating Screens are designed for maximum durability and optimal ef fi - ciency, McLanahan reported. For maximum durability, the screens are fabricated with A572 grade-50 steel plate, which offers a 45% higher-yield strength than A36 plating, the company reported. "Side plates are a fully bolted construction, which reduces and elim- inates cracking due to stress caused by welding," McLanahan reported. "The bolted construction also makes it easier to change out worn components with- out cutting." Screen design is intended to improve user safety and facilitate maintenance, the company reported. The line provides maximum head- room between decks to speed and simplify media changeouts, McLanahan reported. The shaft integrates bronze sleeves at both ends for protection when the outer race of the bearing could potentially turn on the shaft, the company reported. "This reduces unnecessary downtime and only requires the sleeve to be replaced," Mc- Lanahan reported. "All components slide onto the shaft, allowing for easy removal and installation." Above, orange pins secure the screens and are screwed in with an impact driver. (Photo: Metso) MAX Series Vibrating Screens are a solution that can be adopted with no modification of existing structures, the company says. (Photo: McLanahan)

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