Engineering & Mining Journal

JUN 2019

Engineering and Mining Journal - Whether the market is copper, gold, nickel, iron ore, lead/zinc, PGM, diamonds or other commodities, E&MJ takes the lead in projecting trends, following development and reporting on the most efficient operating pr

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Page 54 of 115

FANS AND VENTILATION JUNE 2019 • E&MJ 53 ground Mining. "There is no need to ven- tilate the entire mine because production may only be concentrated in, say, 20% of the facility at any one time. "By controlling mine ventilation in this way, annual energy savings of up to 50% are possible." The Ability package also includes Ventilation Optimizer, a complete mine ventilation control solution that operates equipment according to actual ventilation demands. These are dynamically calculat- ed from mine production schedules and events, and event equipment status and location, ensuring optimum performance. "There are three levels to ABB Ability Ventilation Optimizer," Nyqvist said. "The first involves basic control, such as remote- ly starting and stopping equipment from the control room, meaning personnel do not have to venture into hundreds of kilometers of underground tunnels to start a fan. "The second level is the VOD function- ality and finally, in level three, we employ an algorithm, sensor feedback and ad- vanced multivariable control technology to run all the fans in optimal operational mode, distributing the air supply more ef- ficiently and minimizing energy consump- tion in real time." The implementation of Ventilation Op- timizer at the Garpenberg mine in Swe- den meant that energy consumption by fans fell by approximately 600 kW. This equated to a 40% reduction in energy costs for the owner Boliden. "Using ABB Ability Ventilation Opti- mizer level 3 with model-based control, we are able to run the ventilation system at Garpenberg completely automatically, or autonomously," said Nyqvist. "Using feedback control from sensors, we can update the operational set points on the system every 15 seconds, meaning that A CFT dry deduster for underground mining. (Photo: CFT)

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