Rock Products

JAN 2013

Rock Products is the aggregates industry's leading source for market analysis and technology solutions, delivering critical content focusing on aggregates-processing equipment; operational efficiencies; management best practices; comprehensive market

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Bosch Rexroth AG High-Pressure Axial Piston Greater power density and optimized control behavior in the implement hy‐ draulics boost the productivity of mo‐ bile working machines in mining operations. Rexroth's new high‐pres‐ sure axial piston unit A11VO series 40 fulfills all the necessary preconditions. In an open circuit, it generates a nomi‐ nal pressure of 350 bar and a maxi‐ mum pressure of 420 bar. Despite the extremely compact dimensions, the new design boosts performance and its numerous electrical and hydraulic con‐ trol options improve the response of the implement hydraulics. OEMs are thus able to realize control systems which are perfectly tailored to the ve‐ hicle concerned. The universal through‐drive makes it easier to combine with a broad range of axial piston pumps, gear pumps and other hydraulic pumps, satisfying even the high power requirements of large‐ scale machines in mining operations. And the new model series also makes compliance with even stricter interna‐ tional emissions regulations easier. Available in five sizes from 110 ccm to 280 ccm, the series reduces noise emis‐ sions by up to 3 dB(A) compared to con‐ ventional pumps and boosts efficiency to 93 percent. That reduces diesel con‐ sumption and reduces the total cost of ownership. Bosch Rexroth AG, www.boschrexroth‐us.com PRODUCT FEATURES: n Generates a nominal pressure of 350 bar and a maximum pressure of 420 bar. n Despite the extremely compact dimensions, the new design boosts performance and its numerous electrical and hydraulic control options. n Improves the response of the implement hydraulics. Deister Ultra-Fines Recovery System Deister Machine Co. offers its new Ultra‐ Fines Recovery System (UFR), which is designed to recover ultra‐fine sands and silts in quarry applications; or to re‐ cover tailings in various mining applica‐ tions, allowing operations to eliminate or greatly reduce the use of mainte‐ nance‐intensive settling ponds. even distribution of solids to all cy‐ clones. The reverse slope vibrating screen is available in sizes up to 7‐ft. wide and 12‐ft. long, with solids capaci‐ ties up to 70 tph. As a more cost‐efficient alternative to the use of costly plate filter presses, for example, the Deister Ultra‐Fines Recov‐ ery System enables producers to create a dry tailing or silt product which can be stockpiled prior to removal, or used as a saleable product. The UFR System Cyclones are available with a variety of liner and body materi‐ als. Victaulic connections allow flexibil‐ ity and ease of maintenance. Optional "Duck Bills" can be attached to the cy‐ clone apex with siphon control to ac‐ commodate variable feed solids conditions. The sump is constructed with heavily reinforced ¼‐in. walls and wide flange beam vertical columns. The Deister UFR System is capable of recoveries to 350‐400 mesh, and at feed capacities from 1,500‐3,500 gpm. It uti‐ lizes a radial distribution manifold for railed stairway and platform on both sides and back of the screen allow for safe and easy maintenance access; and several pump configurations are avail‐ able mounted on a steel frame base pad. Deister Equipment Co., www.deistermachine.com A sloped bottom plate promotes even solids flow to the pump inlet and an au‐ tomatically adjusted make‐up water valve protects the pump. A sturdy hand PRODUCT FEATURES: n Capable of recoveries to 350-400 mesh, and at feed capacities from 1,500-3,500 gpm. n Utilizes a radial distribution manifold for even distribution of solids to all cyclones. n Reverse slope vibrating screen is available in sizes up to 7-ft. wide and 12-ft. long, with solids capacities up to 70 tph. www.rockproducts.com ROCKproducts • JANUARY 2013 7

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