Coal Age

JUL-AUG 2018

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42 July/August 2018 product news FLSmidth Cuts Lead Times for Fine-coal Centrifuges For an Australian open-cut mine, the service exchange pro- gram developed by mineral processing specialists FLSmidth cut the potential lead time for a replacement fine-coal centrifuge from eight weeks to 48 hours. Production from the preparation plant at a large Hunter Val- ley-based thermal coal producer and exporter was severely impacted when one of the six installed fine-coal centrifuges went down due to gearset failure. The first-choice supplier quot- ed the replacement time in weeks. FLSmidth said the plant would be operational again in 48 hours. A high-capacity FC1200-LS fine-coal centrifuge with the lubrication system (LS) upgrade was available off-the-shelf from the company's workshop in Pinken- ba, Queensland. To extend equipment life, increase availability, and lower maintenance and operating costs, the LS upgrade delivers a range of benefits, including changes to the top of the main shaft assembly (the wet end) to improve sealing, enhanced lubricant flow to the main rotating com- ponents and automatic lubrication to components normally only accessible during shutdown. Two days after the gearset failure shut down one of the mine's six centrifuges, the replacement unit had been installed and commissioned and the prep plant was back to full operational capacity. Introduced in 2017 after 12 months of planning, the program already has impres- sive runs on the board thanks to a philos- ophy of supplying the necessary compo- nent on a quick turnaround and backing it with the knowledge that the exchange item will perform to original equipment manufacturer (OEM) standards. The range of equipment available on the service exchange program includes vibrating screen exciters, fine and coarse coal centrifuges, screen-bowl centrifuge rotating assembles, and stockpile dis- chargers, all reconditioned and tested to OEM standards and, in the case of the FC1200 centrifuge, upgraded with the unique lubrication system. Since introducing the program, the company has established a regular-ser- vice exchange schedule with a number of clients across Australia and argues that such a timetable gives customers production certainty and equipment re- liability. The cost savings associated with the program are linked to the reductions in plant downtime through the planned change-out schedules or, in the example of the Hunter Valley miner, by the ready availability and delivery of the service ex- change part. Power Rewind Reels The N800 Series of spring rewind reels from Hannay Reels are designed for 0.75- in. or 1-in. I.D. hose. The reels are designed for fuel dispensing and waste-oil evacu- ation use and can withstand between 2,000 psi and 6,000 psi, depending on requested specifi- cations. The stan- dard N series has a narrow frame and compact mount- ing base, with a non-sparking ratch- et assembly. Mine Dewatering Pump Skids The Netzsch dewatering pump skid unit includes a tank, progressing cavity pump with right angle gearmotor, inspection ladder, valves, and piping — all mount- ed on a common galvanized steel skid. Also available are optional units with a control panel (with or without VFD on a removable stand) and instrumentation, including high/low level switches for the tank or dry run protection for the pump. Individual pumps are available to retrofit existing skids. The tank includes baffle/ divider screens to filter out any solids too big to fit through the pump. The pump is located to the side of the tank, enabling

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