The mining of metal ores is a cleaning-intensive process. Take, for example, the large, open-pit Cerro Verde mine near the Peruvian city of Arequipa. The copper mine produces around 270,000 tonnes of copper ore and 6,500 tonnes of molybdenum annually.
Based on UL regulations
Investment in the site includes, among other things, several pumping stations and a powerful wastewater treatment plant, which receives wastewater from the entire mine area as well as the wastewater from the ore-washing plant. SPANGLER Automation has configured the controls for the system and designed them according to US regulations UL 508 A and UL 698 A. This also includes the construction of the three requisite control cabinets. One of which was built double-walled in stainless steel to reduce heat input under subtropical climate conditions.
Interruption free switches
SPANGLER employees programmed two Allen-Bradley ControlLogics control systems specifically for this plant.Due to the high safety requirements in mining, the controls are both connected redundantly. If one fails, the second is switched to without interruption. The system controls five filter step screens, two conveyor screws and two wash presses for wastewater treatment at the highest level.
Tight safety measures
The tight safety measures in mining have shaped the whole nine-month project. Just in terms of on-site commissioning activities, a three-day safety check had to be completed in advance by the SPANGLER Employees.