LUDO™ screens | Reliable, heavy-duty mining screens from FLS

LUDO™ screens | Reliable, heavy-duty mining screens from FLS

Frequently asked questions

FAQs for screening equipment

Screens classify material by particle size and shape, separate feed into valuable and waste streams, and remove excess moisture. They sit at almost every stage of the flowsheet, which is why screening performance shows up in the results of the equipment around it rather than only in its own numbers.

Five, named by what they do. LUDO Banana screens for high-tonnage scalping and sizing, LUDO Horizontal screens for mill discharge and fine screening, LUDO Inclined screens for sizing and reclaim duties, LUDO Dewatering screens for moisture removal, and LUDO Trash screens for process water and carbon safety. Each is available in single, double and triple deck configurations.

Material characteristics, target cut size and output, screening area and deck configuration, maintenance access, operating environment, and budget all shape the answer. FLS screening specialists work through these with you to define the duty, then select the geometry, motion profile and media against it.

Crushing circuit screens prioritise high-capacity scalping and sizing, to protect crusher utilisation and control recirculating load. That duty usually calls for LUDO Banana screens in multi-slope configurations. Grinding and classification screens focus on precise size separation at SAG discharge, to reduce overgrinding and hold energy efficiency. That duty usually calls for LUDO Horizontal screens.

Both carry the same engineering standard. Configured to order draws the screen from the standard LUDO range, with the drawings, supporting documents and budgetary pricing generated from that configuration. Engineered to order starts from the constraint in your plant, so deck dimensions, feed and discharge arrangement and structural interfaces are designed around the position the screen has to occupy. The route changes the engineering effort, not the standard.

Primary & secondary crushing	Scalping ahead of crushers to remove undersize material.	Banana, Inclined	Bypasses material that does not require crushing, preserving crusher capacity and reducing unnecessary size reduction.
Tertiary crushing & product sizing	Closed-circuit classification and final product sizing.	Banana, Inclined, Horizontal	Controls circulating loads and delivers correctly sized material to downstream processes or final product streams.
HPGR circuit	High-capacity classification of HPGR discharge.	Banana	Maintains target cut sizes and controls circulating load, supporting consistent HPGR throughput.
SAG & AG mill discharge	Separating correctly sized discharge from oversize material and pebbles.	Horizontal, Banana	Directs correctly sized material downstream while managing oversize, supporting stable mill operation and efficient grinding.
Pebble crushing	Scalping ahead of pebble crushers.	Banana	Removes undersize material from crusher feed, preserving crushing capacity and controlling pebble recirculation.
Beneficiation feed classification	Wet and dry particle-size classification ahead of downstream separation.	Horizontal	Controls feed particle size, helping maintain consistent separation performance and limiting misplaced material.
Desliming & washing	Removing unwanted fines and clays ahead of beneficiation.	Banana, Inclined	Reduces fines carryover and improves feed quality for downstream separation processes.
Dense media separation	Feed preparation and drain-and-rinse screening.	Banana, Horizontal	Supports efficient medium recovery, reducing medium losses and operating costs.
Product dewatering	Removing water from coarse products and intermediate process streams.	Dewatering	Reduces product moisture for easier handling and returns process water earlier in the circuit.
Process water and carbon safety	Removing tramp material from process streams and screening for carbon losses in gold circuits.	Trash	Protects pumps and downstream equipment from blockages and damage while helping prevent valuable carbon losses.
Tailings & water recovery	Dewatering coarse tailings and rejects ahead of handling or stacking.	Dewatering	Improves material handling and recovers process water, reducing water losses from the circuit.