Author: gnadmin

GN Solids Control has supplied a 14-inch dewatering decanter centrifuge for an overseas wastewater treatment plant, providing an efficient solution for sludge dewatering and volume reduction. The GN T Series dewatering decanter centrifuge is specifically designed for applications requiring high solids dryness and reliable continuous operation.

With an 8.5° beach angle, the T Series centrifuge features an extended dewatering zone, allowing more effective separation and producing drier solids at the discharge. The optimized liquid pool depth, pitch and beach design also improve liquid clarity while reducing energy consumption. Key rotating components are manufactured using centrifugal casting and precision forging processes, while duplex stainless steel SUS2205 or SUS2304 can be adopted for excellent corrosion resistance and mechanical strength.

For wastewater containing fine suspended particles, GN can combine the dewatering centrifuge with a Chemical Dosing Unit. Flocculants are prepared and dosed into the sludge to agglomerate fine particles before centrifugation, significantly improving separation efficiency and dewatering performance.

The system can be customized according to different sludge characteristics, including municipal sewage sludge, industrial wastewater sludge and other high-concentration materials. With integrated monitoring, overload protection and automatic alarm functions, GN‘s dewatering solution provides stable, efficient and easy-to-maintain operation for modern wastewater treatment plants.

Ball mill grinding accounts for up to 50% of total energy consumption in mineral processing plants. When conventional hydraulic classification recirculates already-ground iron minerals into the mill, plant operators face reduced circuit capacity, elevated power costs, and recovery losses caused by ultrafine slimes.

The GN Separation Stack High-Frequency Vibrating Screen eliminates these operational bottlenecks. By substituting specific-gravity classification with sharp, geometric particle sizing, this technology delivers cleaner concentrate separation and higher grinding circuit efficiency.

Engineered for High-Wear Slurry Environments

• Targeted G-Force Acceleration: High-speed, micro-amplitude linear vibration breaks pulp surface tension instantly. Fine particles settle through the fluid layer rapidly while coarse oversize conveys smoothly off the deck, preventing aperture blinding and slot blockage.

• Vertical Stack Architecture: Available in multi-deck parallel configurations fed through an internal slurry distributor. This compact footprint delivers the screening capacity of several conventional single-deck screens while conserving valuable plant floor space.

• Long-Life Polyurethane Screening Media: Custom-formulated wear-resistant polyurethane panels (apertures down to 43 microns) resist highly abrasive magnetite and hematite pulps, maintaining aperture accuracy across prolonged operational cycles.

• Balanced Dynamic Vibration Control: Precision-tuned isolation mounts absorb working dynamic loads, enabling straightforward installation onto existing steel platforms without heavy structural modifications.

Performance Impact in Iron Beneficiation

• Increased Grinding Circuit Throughput: Diverting qualified finished fines out of the recirculating load frees up grinding capacity, delivering an immediate 15% to 30% increase in mill throughput.

• Direct Silica Rejection: Cleanly strips out coarse, silica-rich middlings before magnetic separation or flotation, boosting iron concentrate grade by 1% to 3% and reducing silica penalties.

• Lower Specific Power Consumption: Eliminates redundant over-grinding of heavy mineral fractions, cutting kWh per ton of produced concentrate.

• Optimized Downstream Dewatering: Consistent, sharp cutoffs reduce ultrafine slimes, significantly improving downstream thickener underflow densities and filter cake moisture levels.

Built for Heavy Mining Operations by GN Separation

With complete in-house manufacturing, full CNC fabrication lines, and field-tested installations across the globe, GN Separation manufactures rugged separation and screening machinery designed for maximum uptime in demanding mineral processing circuits.

CONTACT US-GN SEPARATION

Contact GN Separation engineers today to evaluate your slurry parameters (feed solids %, PSD, and target separation size) and receive a customizedscreening flowsheet recommendation.

GN Solids Control has developed the Synergistic Frequency Vibrating Screen for efficient screening, grading, and separation of fine-grained materials. For iron ore processing, the screen provides an effective solution for fine screening where conventional screens may face challenges such as mesh blinding and low screening efficiency.

The GN Synergistic Frequency Vibrating Screen combines linear vibration and partial electromagnetic vibration. Dual vibration motors drive the screen deck to perform stable linear vibration, ensuring smooth material transportation across the screen surface. Meanwhile, electromagnetic exciters generate high-frequency vibration directly on the screen mesh. The electromagnetic amplitude can be adjusted by controlling the current, allowing the vibration intensity to be optimized for different screening conditions.

The strong instantaneous electromagnetic vibration helps the screen mesh achieve self-cleaning, reducing blockage and maintaining stable screening performance. Electromagnetic exciters can also be controlled separately to meet different amplitude requirements across the screen surface.

For wet iron ore screening, the integrated water spray system helps disperse materials and improve screening efficiency. In addition, all material-contacting parts are coated with polyurea, providing enhanced wear and corrosion resistance for longer equipment service life.

With its combined vibration technology, high screening efficiency, and anti-blinding performance, the GN Synergistic Frequency Vibrating Screen is a reliable solution for fine iron ore screening and other mineral processing applications.