MINERAL SEPARATION reliability, Multotec engineers oversaw sampling procedures to eliminate bias, giving the client confidence in the final configuration.
The cyclone’ s performance depends on factors such as length, cone angle, spigot size, and vortex finder selection. Multotec’ s GV Cyclones can be supplied with either a 10 ° or 20 ° cone angle, allowing operators to balance ease of handling with fine performance control.
For this project, Multotec customised the inlet head size and overflow elbow flange to integrate seamlessly with the client’ s existing pipework. This removed the need for auxiliary adaptor equipment and reduced the weight of the cyclone, demonstrating Multotec’ s commitment to delivering fit-forpurpose solutions that add real value on site.
“ The GV Cyclones were designed with operators in mind. Features like the lightweight body, interchangeable cone angles, and quick-release spigots make day-to-day management easier and safer, while still delivering the durability needed for harsh conditions,” explains Blane Pillai, Applications Engineer at Multotec.
The GV Cyclones are engineered to deliver the optimal volumetric split between overflow and underflow to meet TSF rate-ofrise requirements. Their configuration can be adjusted as deposition conditions evolve, ensuring consistent performance even if the characteristics of the ore entering the processing plant change.
Built to absorb pressure spikes during start-up, the cyclones offer stability under demanding conditions, while the quickrelease spigot system simplifies adjustments and minimises downtime. Key design features included:
• Lightweight construction: Weighing just 44.6 kg, the cyclone can be easily manoeuvred by operators for installation, handling and maintenance.
• Durable build: A steel rubber-lined inlet head and cone, with a 15 mm replaceable liner ensure wear resistance and a long service life.
• Quick-change spigot system: A lightweight, tool-free screw coupling enables operators to replace spigot rapidly without shutdowns. Since spigot diameter directly influences product quality and deposition accuracy, this feature is critical to TSF stability.
• Flexible operation: Interchangeable spigots, vortex finders, and cone angle options( 10 ° and 20 °) give operators control across different stages of TSF development.
• Optional movable stands / skids: Improve cyclone relocation efficiency while reducing labour requirements.
In 2025, Multotec received an order for upwards off 200 GV250 Cyclones, for a client’ s existing TSFs which are now being commissioned. Multotec says installations at other sites already highlight their benefits.“ Cyclones enable a faster, more controlled rate of rise compared to traditional open spigot deposition, reducing labour intensity, lowering operational costs, and giving operators precise control over dam wall height,” says Erick Herbst, Territory Sales Manager – Capital at Multotec.
NAIPU’ s innovative hydrocyclone solutions
Beyond its well known forged composite mill liner range, China’ s NAIPU Mining Machinery also supplies hydrocyclones and supporting equipment for grindingclassification circuits. The scope covers slurry pumps, piping and valves, key instrumentation and automation.
NAIPU supplies the NPX cyclone series, within which FX and GX refer to sub-series / configurations within the NPX cyclone portfolio based on design and application range. The NPX cyclone series is independently designed, engineered and manufactured in-house by NAIPU.
NAIPU told IM that, compared with headline specifications of individual units, concentrator operations are more concerned with whether the grindingclassification circuit can run reliably within a defined pressure and flow window, while maintaining a predictable maintenance rhythm. NAIPU says its package scope can cover slurry pumps, inlet / outlet piping( including valves and instrumentation) and the hydrocyclone cluster, helping reduce the number of interfaces and on-site integration workload.
For the hydrocyclone itself, NAIPU says its emphasis is not simply higher capacity on one unit, but achieving higher throughput within the same feedpressure window while reducing wall scouring intensity- so that wear behaviour and maintenance intervals become
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� Prevents equipment damage and reduces downtime more controllable. In one comparison between the GX-series GX650 and FX-series FX660 within a 40-100 kPa feed-pressure range, the GX650 is reported at 454.3- 710.1 m ³/ h versus 335.5-526.4 m ³/ h for the FX660, indicating an approximate 35 % capacity advantage( 34.9 %-35.4 %). Velocityfield comparisons show the GX650 with a maximum velocity of about 4.7 m / s( around 6.4 m / s for the FX660) and a maximum radial velocity of about 1.8 m / s( around 5.1 m / s for FX660), suggesting a less aggressive scouring and impact regime that is more favourable for reducing wear loading. NAIPU provided two application examples. At the Erdenet EPC project in Mongolia, operating data shows that a 550NZJA-MR slurry pump paired with an FX838 cyclone cluster delivered 4,200- 5,200 m ³/ h with an overflow fineness of 65 % passing 200 mesh. A second example comes from a copper concentrator’ s thirdstage grinding and classification circuit, where the overflow product was 95 % passing 200 mesh and throughput was 100- 220 m ³/ h. The first case represents delivery under high-flow duty, while the second reflects classification operation under a finer target product size.
NAIPU also highlights wear-life performance to illustrate maintenanceside benefits. At one concentrator’ s grinding – flotation section hydrocyclone cluster( Φ660-7), NAIPU’ s silicon nitride
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International Mining | MARCH 2026 27