Sludge dewatering decanter Centrifuges

for the chemical industryfor wastewaterfor the mining industry

Overview
Maximise water removal with dewatering centrifuges from FLS. Engineered decanter, screenbowl and scrolled-basket designs deliver high solids recovery and low product moisture for mining and mineral processing applications such as coal, salt, granulated slag and chemical solids. Optimised basket/bowl geometry, high G-forces and controlled feed handling improve cost and thermal efficiency.

Key benefits

• High capacity and consistent performance across a wide range of particle sizes and throughputs
• Modular construction for rapid access to wear parts and simplified maintenance
• Proven separation and dewatering results for coal, chemicals and wastewater solids
• Integrated automation and monitoring to reduce operator intervention and protect drivetrains

Product families & highlights

• Decanter Screenbowl Centrifuge: combines filtration and sedimentation to improve dewatering; open-end discharge increases capacity and reduces wear. Benefits: compact footprint, high solids recovery, low-maintenance access and extended uptime with service support.
• Coarse Coal Centrifuges (VM series): horizontal vibrating-basket machines for harsh mining conditions; treat coarse feed (approx. -50 mm to +0.5 mm) and reduce feed moisture significantly (example: ~18–25% down to ~2–9% surface moisture). Six models cover 20–410 t/h (VM600–VM1650).
• Decanter Solidbowl Centrifuge: sedimentation decanter with internal scroll for fine or low-density solids; available in vapour-tight and pressurised configurations; suited to chemical and municipal sludge applications.
• Fine Coal Centrifuges (vertical and horizontal scrolled-basket types): abrasion-resistant linings, feed distributors and scraper scrolls for high-efficiency dewatering of cyclone underflow or fines screens. Typical reductions from ~45–55% to ~9–13% moisture depending on particle size distribution.

Selected models — descriptions

• FC1200: modular design for straightforward maintenance; one-piece disposable basket; reusable oil filter with magnet and blocked-filter bypass indicator. Performance: large throat opening and 16 conveying fins for improved throughput and dewatering. Typical data: nominal capacity 50–80 t/h (particle-size dependent); main drive 55 kW; lube motor 1.1 kW; basket Ø 1200 mm; apertures 0.250 / 0.375 mm; overall ~3060 L x 2365 W x 2360 H mm; weight ~5,650 kg; feed size ~-2 +0.100 mm.
• HFC1300-S2: low-profile horizontal layout for safer maintenance; hinged door with chute for quick access; externally mounted drives for safe service access; torque-monitoring sensors regulate feed to minimise clutch trips. Designed for up to ~100 t/h aiming for the driest product. Typical data: nominal capacity ~100 t/h; drive 110 kW; lube motor 0.75 kW; basket Ø 1300 mm; aperture 0.375 mm; size ~3010 L x 2256 W x 2065 H mm; weight ~6,300 kg; feed range -2 +0.100 mm.

Applications

• Coal dewatering (coarse and fine)
• Salt, potash and soda ash processing
• Granulated slag and a range of chemical products (e.g., PX, PVC, sodium hypochlorite, Oxone, CPVC)
• Municipal wastewater biosolids and sludge dewatering (with suitable decanter configuration)

Operational & monitoring features

• PLC-based control, vibration monitoring, flow and temperature sensors, torque monitoring and lubricant system switches
• Circulating lube systems with pump, filter, heat exchanger and oil flow switches
• Modular drive arrangements, motor positions and basket customisation options
• Available vapour-tight or pressurised designs where required

Technical specifications

• Typical basket diameters: 762–1372 mm across decanter range; FC1200: 1200 mm; HFC1300-S2: 1300 mm
• Nominal capacities (examples): VM series up to 410 t/h (VM1650); FC1200: 50–80 t/h; HFC1300-S2: up to 100 t/h (particle-size dependent)
• Main drive power examples: FC1200 – 55 kW; HFC1300-S2 – 110 kW
• Lubrication motor examples: 1.1 kW (FC1200), 0.75 kW (HFC1300-S2)
• Basket aperture options: typically 0.250 / 0.375 mm (model dependent)
• Feed size ranges: coarse centrifuges approx. -50 mm to +0.5 mm; fine machines -2 to +0.100 mm (model dependent)
• Typical moisture reductions: fine units can reduce feed moisture from ~45–55% to ~9–13%; coarse machines from ~18–25% to ~2–9%, depending on particle size and coal type
• Materials & wear: wear-resistant linings, polyurethane doors, stainless-steel baskets and optional advanced wear liners
• Design & safety: modular build for quick access, open-end discharge (screenbowl), vibration isolation (decanter), torque monitoring and feed regulation sensors