Metso releases new mill drive system for mining industry
"Traditionally, the mining industry has been somewhat reluctant to change, but change has occurred nonetheless and the industry is now encouraging innovations to operate in a more efficient way," Frank Tozlu, product manager of large grinding mills, said. "Our goal was to design a robust, reliable, cost-effective, high-powered mechanical solution without compromising the high design standards we are all used to seeing in our customers' specifications."
By equally dividing power from two motors into a four-pinion system, the QdX4 raises the power capacity for SAG and ball mills to 32 megawatts, 14 megawatts more than the capacity of current gear-drive designs.
The QdX4 is also an improvement on gearless drive systems, weighing half as much and taking one-third of the time to install. Once installed, the QdX4 is maintained by lubrication systems for the internal transmission gearing and the closed loop mill gear and pinion interface that reduce the need to dispose of used gear grease.
The new system further optimizes efficiency by doing away with several standard features of other designs, including large brakes, foundation brake piers, and extended feed and discharge mill flanges. With these improvements, Metso said their Qdx4 is the first alternative to gearless drive systems for mining operations.