An ultra fines recovery (UFR) unit is a specialized system designed to recover fine solids—typically in the +400 mesh (38µm) range—from wash plant effluent streams or slurry waste. These systems combine a sump, slurry pump, hydrocyclone cluster, and dewatering screen in an integrated module. The UFR captures valuable fines that would otherwise be lost to settling ponds, converting waste material into a saleable, stackable product while reducing pond maintenance costs and environmental impact.

Ultra fines recovery units serve multiple applications across the mining and aggregates industries. Key applications include:

Sand and aggregate washing: Recovering fine sand fractions (typically +400 mesh/38µm) from screw washer or bucket wheel overflow that would otherwise report to settling ponds.

Mining operations: Recovering valuable mineral tailings and reducing solids reporting to tailings storage facilities.

Industrial minerals processing: Capturing fines from silica sand, frac sand, and other industrial mineral washing operations.

Pond remediation: Dredging and processing existing settling pond material to recover valuable fines and reduce pond volume.

Iron ore and coal recovery: Recovering fine particles in mineral beneficiation circuits.

Ash processing: Recovering usable materials from ash streams.

An ultra fines recovery unit operates through a multi-stage process:

Collection: Slurry from the wash plant effluent is directed to a partitioned sump.

Pumping: A rubber-lined slurry pump delivers the slurry at relatively high pressure to a cluster of hydrocyclones.

Classification: Hydrocyclones use centrifugal force to separate fine solids from the liquid. The underflow (containing the recovered +400 mesh fines) is discharged onto a dewatering screen, while the overflow (containing mostly water and ultrafine silts) returns to the settling pond or further processing.

Dewatering: A high-frequency dewatering screen reduces the moisture content of the recovered solids to produce a drip-free, conveyable, and stackable product (typically 20-25% moisture content).

Closed circuit: Fines that pass through the dewatering screen are recirculated back to the hydrocyclones for reprocessing.

Ultra fines recovery systems offer numerous operational and financial benefits:

Increased yield: Recover valuable fines that would otherwise be lost to settling ponds, increasing overall plant yield by 5-10% or more.

Reduced pond maintenance: Significantly decrease the frequency of pond dredging—from multiple times per year to once a year or less.

Saleable product: Convert waste material into a marketable product such as utility backfill, pipe sand, or specialty sands.

Fast ROI: The value of recovered material often pays for the equipment within one operating season.

Reduced environmental impact: Minimize the footprint of settling ponds and reduce solids loading on downstream water treatment equipment.

Lower operating costs: Reduce expenses associated with pond dredging, excavation, and maintenance.

Improved safety: Eliminate the need for dangerous pond excavation and reduce health and safety risks.