Coal Age

JUN 2018

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Somerset Coal International's Sub325 ® Fine Coal Recovery System is a pow- erful solid bowl centrifuge technology that separates fine particles and water. Somerset Coal International (SCI) is providing a unique centrifuge to the coal industry by making three key advancements: redesigning internal geometry, creating extremely high G-force and optimizing the rotation differential be- tween the bowl and scroll, which is adjustable during operation. The Sub325 ® System: • Uses a programmable logic controller (PLC) to continuously monitor input into the unit, make critical adjustments and provide key, real-time opera- tional data, all on the fly. • Captures fine coal that screen bowl centrifuges are not designed to and cannot capture. • Seamlessly integrates into your plant operation with no downtime. • Increases screen bowl performance and lowers product moisture 0.25% to 1.1%. • Recovers fine coal at an AR-moisture in the 15%-22% range while add- ing 5 - 15 tons of clean coal per hour, depending on the size of the plant and coal characteristics. • Decreases chemicals needed at the thickener. • Increases refuse impoundment life by diverting quality coal to the clean product belt. • Can provide room for spiral and flotation cut point raises. This breakthrough system enables mines to increase yield and profitabil- ity and decrease plant and waste-related costs by placing ultrafine clean coal to the product belt that now reports to refuse. Added Value with No Costs SCI offers its breakthrough system without any required capital or mainte- nance expenditures to their customers. The Sub325 ® System will generate substantial value and increased revenue for its customers. Somerset is paid via a revenue sharing agreement which is substantially weighted to its cus- tomers. Units are currently installed in both the United States and Australia, with plans for additional installations in Russia. The premise for installation lies in the fact that screen bowls in coal prep plants are not designed to nor can they capture the smallest size fractions. Even though screen drain is recirculated in an attempt to capture this elusive coal, the particles still get lost to refuse. Actual trials and instal- lations consistently show approximately 2 to 4 times the volume of fines in the recirculating stream than are reported on a typical flow sheet. Likewise, we have found the percentage of solids in a screen bowl's effluent stream (ultrafine coal) are 2 to 4 times what was thought to be there. The Sub325 ® is designed specifically to capture this lost coal at marketable moisture. We prove this to plant operators during a Definition Period using 0.25% belt scales to measure the "new tons". The installed Sub325 ® System unit is turned on and off to allow a comparison of the total clean coal your plant recovers with and without the technology in use. Additional Environmental and Operational Benefits While the primary benefit of the Sub325 ® System is increased revenue at no cost, it also provides a more environmentally-friendly and efficient operation. Less chemicals are needed at the thickener to sink fine coal particles, reduc- ing both costs and environmental impact. The system also decreases refuse because the fine coal does not report to the thickener, slurry pond or combined refuse stream. Additionally, and very importantly, the Sub325 ® System increas- es efficiency throughout the fine circuit by reducing the recirculation load. To learn more about Somerset Coal International and its breakthrough Sub325 ® System, or to set up a free consultation, visit or call (412) 576-4000. Who's Behind Somerset Coal International? Founded by individuals with decades of experience in the mining and mineral industries, Somerset Coal International is leading the way in fine coal recov- ery. SCI partnered with Centrisys Corporation – a proven leader in centrifuge technology used in the water and wastewater market. Using Centrisys' proven centrifuge base design, enhancements were made to adapt its use to the coal industry. See our website for bios of the coal professionals behind the scenes of Somerset Coal International. Company Profile–Paid Advertisement Sub325 ® Fine Coal Recovery System

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