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© 2004 by RULMECA Corporation

UK COAL Cuts Downtime

Motorized Pulley Powers Kellingley Colliery Conveyor

UK COAL’s Kellingley Colliery avoided 30 days of downtime and 300,000 tons of lost production in 2004 thanks to their tailings conveyor drive upgrade in 2003.  Since the system does not have redundant conveyors, tailings belt stoppage meant mine production stoppage…this “tail” was wagging the “dog.”
Faced with an aging conveyor system, frequent stoppages, and a £30,000  ($56,700) annual conveyor maintenance budget, UK Coal’s Engineering Manager, Steve Pringle, and Mine Surface Manager, Mick Barry, decided to improve the 500 tph conveyor drive reliability while decreasing maintenance costs. 
They replaced the problem-prone exposed dual motor/gearbox center drive arrangement with a 100 HP (75 kW) Rulmeca Motorized Pulley, installed at the discharge end.
Photo Caption: Elevated conveyor discharges tailings at 500 tph.
The 31.5" (800 mm) diameter Model 800H Motorized Pulley was installed in just ONE MORNING because the motor and gearbox are enclosed within the pulley shell and it was not necessary to revise to the conveyor support structure.
Photo Caption: Rulmeca Motorized Pulley drives belt at discharge end.
Controlled by a variable frequency drive on a 550v/3phase/50 Hz power supply, the Motorized Pulley saves £6,000 ($11,340) per year in reduced electrical power consumption thanks to its higher overall efficiency.
Mr. Pringle said “We expect our first year’s performance to be fairly typical because the Motorized Pulley’s motor and gearbox are automatically self-lubricated within the hermetically-sealed pulley shell.”  Regreasable labyrinth seals protect the internal components from water and dust ingress.
Photo Caption: Close-up of 100 HP (75 kW) Rulmeca Motorized Pulley prior to installation.
Now the power plant fed by Kellingley Colliery need not rely on expensive oil during tailings belt stoppages because they’ve been eliminated.
For more information contact…

Rulmeca Corporation
6740-E Netherlands Drive, Wilmington, NC 28405
Tel: 910-794-9294
FAX: 910-794-9296

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