Laboratory concentrator Knelson™

industrial

Overview
Our gravity separation equipment provides an effective solution for recovery of gold and other precious metals. Designed for versatile operation, Knelson™ concentrators adapt to a wide range of feed types and circuit positions, from laboratory scale to high‑capacity production.

Key benefits

• Improved recovery of coarse and fine gold using fully fluidised cones — patented fluidised‑bed design distributes material across the cone surface for efficient capture.
• Lower maintenance downtime — rubber‑lined internals, stainless steel components, reduced parts count and automated lubrication simplify upkeep and extend service intervals.
• Operational flexibility — operates at feed densities up to 75% solids and can be installed at multiple circuit locations for targeted recovery.

Knelson™ semi‑continuous and continuous concentrators
The Knelson™ Semi‑Continuous Gravity Concentrator is established for reliable recovery of fine gold and other precious metals, suitable for hard‑rock and alluvial operations and available in model sizes from laboratory units to high‑capacity production machines.

The Knelson™ Continuous Gravity Concentrator is engineered for high mass‑pull recovery, employing proprietary fluidised‑bed technology to produce a continuous concentrate stream while processing incoming feed, avoiding downtime for concentrate removal.

Performance highlights

• Consistent recovery of gold, silver and platinum‑group metals across variable feed conditions.
• Model range supporting capacities up to large‑scale production (examples described up to 1,000 tonnes solids per hour for highest‑capacity units).
• Continuous models deliver high mass pull and steady concentrate streams for improved throughput and operational continuity.

Key equipment features

• Tangential water distribution — tangential introduction of fluidisation water into concentrating rings to reduce ratholing and dead zones and to enable effective flushing.
• Vibration‑reducing design — low centre of gravity and hung installation reduce vibration versus underside supports.
• Reduced parts count — simplified construction reduces manufacturing and maintenance time without impacting recovery or capacity.
• Automated control options — optional automation for real‑time optimisation of fluidisation water, G‑force and cycle time.

Highlighted feature: GX concentrating cone
The patented GX concentrating cone is central to recent Knelson™ QS models. Zone separator nozzles distribute fluidisation water across the cone, improving recovery of coarse and fine gold while reducing particle locking and dewatering at high G‑forces.

Applications

• Hard‑rock and alluvial gold recovery.
• Flotation concentrates, regrind circuits and tails treatment.
• Recovery of precious metals including silver and PGMs; separation of high‑specific‑gravity industrial minerals (e.g., tin) and ash/coal separation applications.

Aftermarket and support
Comprehensive aftermarket support is available, including supply of spares and wear parts, operational assistance, preventive maintenance programs, operator training and circuit optimisation to maximise metal recovery per tonne processed.

Technical characteristics / specifications

• Model / family: Knelson™ gravity concentrator (semi‑continuous and continuous variants).
• Proprietary concentrating element: GX concentrating cone (patented fluidised‑bed rings and zone separator nozzles).
• Capacity range: from laboratory scale up to high‑capacity production units (examples described up to 1,000 tonnes solids per hour for highest‑capacity units).
• Feed density capability: up to approximately 75% solids by weight.
• Materials and internals: rubber‑lined internals for abrasion protection; stainless‑steel components to extend service life.
• Maintenance features: reduced parts count, fewer fasteners, automated lubrication systems to reduce downtime.
• Controls: optional automated control for fluidisation water, G‑force and cycle time for consistent performance.
• Installation design: low centre of gravity and hung installation to minimise vibration.