GN SOLIDS CONTROL recently supplied a 30-inch (760 mm) bowl diameter decanter centrifuge to a domestic mining operation for slurry concentration duty. This unit, model GNLW764A-VFD, represents a significant step in processing capacity for mine dewatering and especially tailings management.
The centrifuge features a bowl length of 3160 mm, yielding a length-to-diameter ratio of 4.2:1. This extended geometry provides prolonged residence time, which is essential for achieving fine solids capture in high-volume slurry streams. The unit handles up to 528 GPM (120 m³/h) at 20% solids content, making it suitable for large-scale mining operations where throughput directly affects production schedules.
Durability in abrasive mining slurries is addressed through tungsten carbide protection applied to the slurry distribution port, solids discharge port, and the screw conveyor surfaces. These wear-resistant measures extend service intervals and reduce maintenance downtime in continuous operation.
Beyond mining slurry concentration, GN’s bowl size serves tunnel boring mud cleaning, dredging slurry separation, industrial wastewater treatment, and municipal sewage sludge dewatering. The VFD-controlled unit allows operators to adjust bowl and differential speeds to match varying feed conditions, optimizing separation performance without mechanical modification.
This domestic installation demonstrates that large-diameter centrifuges, properly specified for the application, can provide reliable, high-capacity solids concentration in demanding mineral processing environments