We are excited to share the news that four GNLW554-VFD dewatering centrifuges are fully prepared and ready to be dispatched to an overseas sewage treatment plant on 28 November 2025. These centrifuges are specifically designed to facilitate sludge separation and enhance the overall efficiency of wastewater treatment operations at the plant. They offer versatile solutions to handle various sludge conditions effectively.

Advanced Features for Optimal Performance

The GNLW554-VFD dewatering centrifuge comes with a variable frequency drive (VFD) system. This innovative feature enables precise and flexible control over the bowl speed, allowing the centrifuge to adapt seamlessly to different sludge characteristics and specific operational needs. The centrifuge drum is constructed from duplex stainless steel, which significantly enhances its strength and provides excellent resistance to corrosion, ensuring long-lasting performance even in harsh environments.

Moreover, the slag discharge ports are equipped with tungsten carbide wear-resistant liners. These liners are highly effective in managing abrasive sludge, reducing wear and tear on key components, and extending the service life of the centrifuge.

Optional Remote Monitoring for Enhanced Efficiency

To further improve operational efficiency, optional remote monitoring interfaces are available for these centrifuges. These interfaces enable seamless integration with the plant's existing automation system. Operators can monitor real-time performance data, make necessary adjustments to operational parameters promptly, and plan maintenance activities in a more organized and convenient manner. This feature also facilitates smoother coordination with other equipment involved in the wastewater treatment process, leading to overall improved plant performance.

Versatile Application for Different Sludge Types

The centrifuges are engineered to handle a wide variety of sludge types, including both municipal sewage sludge and industrial wastewater sludge. With their substantial throughput capacity, they play a crucial role in reducing sludge volume and supporting downstream treatment processes. The VFD control system allows for a gradual start-up and shutdown process, which contributes to operational stability and minimizes mechanical stress on the equipment, thereby reducing the risk of breakdowns and maintenance costs.

Compact and Modular Design for Easy Installation

Featuring a compact and modular structure, these centrifuges can be installed in various layouts, making them suitable for both new and existing treatment facilities. Our dedicated engineering team has worked closely with the client to tailor the centrifuges to meet project-specific requirements. This includes customizing the structural design, adjusting operational parameters, and incorporating optional remote monitoring capabilities to ensure optimal performance and integration with the plant's existing systems.

Stringent Quality Control for Reliable Performance

All four centrifuges have undergone rigorous manufacturing and inspection processes in accordance with established quality standards. Throughout the production phase, meticulous attention has been paid to every detail to ensure the highest level of quality and reliability. As the units are now ready for shipment, this project underscores our ongoing commitment to providing dependable and adaptable equipment for diverse international wastewater treatment applications.

Expected Impact on the Sewage Treatment Plant

The four GNLW554-VFD dewatering centrifuges are anticipated to significantly enhance the plant's ability to handle sludge efficiently. They will help maintain consistent operations, reduce sludge volume, and contribute to broader environmental and wastewater treatment objectives. This delivery further reinforces our unwavering commitment to supplying high-quality solutions that enable treatment facilities to achieve stable performance while meeting evolving operational and environmental requirements. We look forward to seeing the positive impact these centrifuges will have on the plant's operations and the environment.

GN Separation recently completed the delivery of four units of GNLW554-VFD dewatering decanter centrifuges to an overseas municipal sewage treatment plant. This project marks another milestone in GN’s continuous effort to support global wastewater treatment facilities with reliable solid-liquid separation solutions.

As mineral processing projects continue to demand higher efficiency and finer classification, GN Separation is proud to announce the delivery of 13 units of 5-deck stack vibrating screens for a large-scale ilmenite ore classification project. This milestone highlights GN’s commitment to providing reliable, high-performance screening solutions for the mining industry.

Importance of Accurate Ilmenite Classification

Ilmenite is a major titanium-bearing mineral used widely in the production of titanium dioxide, a key material for paints, coatings, plastics, and aerospace applications. Effective classification during ore preparation is essential to ensure high recovery rates and stable product quality. GN’s multi-deck screening technology is designed to meet these demands by offering high-capacity, fine particle separation in a compact configuration.

Key Features of GN’s 5-Deck Stack Vibrating Screen

GN’s stack vibrating screen—also known as a stack sizer—is specifically developed for wet screening and fine classification of mineral ores. Each of the 13 units supplied for this project incorporates the following features:

1. High-Efficiency Multi-Deck Design

Each screen consists of five individual screening decks, allowing simultaneous separation of multiple size fractions while maintaining a small footprint.

2. High-Frequency Linear Vibration

Driven by two synchronized vibration motors, the screen operates through a two-degree-of-freedom resonance system. This design achieves high vibration strength, reduces screen blinding, and improves separation efficiency for fine and challenging materials.

3. Durable Polyurethane Screen Mesh

Each deck is equipped with high-strength polyurethane (PU) mesh panels known for their flexibility, anti-blocking performance, and long service life.

4. Modular Construction for Easy Maintenance

The feeding distribution box and screen frames are modular and easy to assemble or replace, enabling maintenance on individual decks without disassembling the entire unit.

5. Enhanced Wear and Corrosion Resistance

The screen surfaces are coated with a protective layer, and all structural components are treated to withstand abrasive and corrosive mining environments.

Benefits for Ilmenite Processing

For ilmenite classification, GN’s 5-deck stack vibrating screen provides several key advantages:

• Stable and accurate particle size separation

• Efficient handling of high-throughput slurry

• Reduced processing footprint due to vertical stacking

• Lower operating and maintenance costs through a durable, service-friendly design

• Improved downstream performance for magnetic separation or flotation

By using multi-deck high-frequency screening, mineral processors can achieve higher recovery rates and better product consistency—critical factors in titanium ore beneficiation.

Supporting Global Mining Projects

With manufacturing facilities, engineering centers, and service teams in multiple regions, GN Separation continues to support global mining clients with customized screening solutions and responsive after-sales support. The successful delivery of these 13 screening units further strengthens GN’s role as a trusted partner in the mineral processing industry.

GN Separation is excited to announce the dispatch of 13 five-deck stack vibrating screens for a mineral processing project centered on the grinding and classification of ilmenite ore. As illustrated in the project images labeled “Frequency Stack Screen” and “Stack Vibrating Screen for Ilmenite,” this equipment will be installed in the customer's fine classification circuit. Its purpose is to ensure stable particle size control and enhance the overall performance of the process.

Fig.1 High Frequency Stack Screen

Fig.2 Stack Vibrating Screen for Ilmenite

Equipment Design and Functionality

This shipment of equipment is specifically tailored for the fine classification of ilmenite slurry within a closed-circuit grinding system. Each unit features a compact five-deck structure, enabling multiple layers of screening within a single machine frame. This design offers a large screening surface area relative to its overall footprint, making it an ideal choice for facilities where installation space is limited and carefully planned. Compared to traditional screening methods, the multi-deck setup optimizes equipment layout utilization and contributes to a more organized process flow within the plant.

During the design and manufacturing stages, GN placed a high priority on stability, screening accuracy, and adaptability to various feed conditions. The high-frequency vibration system is engineered to ensure consistent stratification of fine particles, maintaining a stable cut size and delivering uniform classification results. To withstand the unique characteristics of ilmenite ore, the structure is constructed using abrasion-resistant materials, and key components are designed for durability during continuous operation.

Importance in Grinding Circuits

In grinding circuits, precise classification is crucial for overall process performance. The five-deck stack vibrating screen is used to separate fine particles, which are suitable for downstream concentration processes, from coarser material that requires further grinding. A stable classification process enhances grinding efficiency, improves the management of the circulating load, and ensures a more predictable feed size distribution. These factors collectively contribute to a smoother production flow in ilmenite beneficiation.

Maintenance and Longevity

To facilitate long-term operation, GN has incorporated a modular screen panel design. This allows for easy replacement and maintenance of screen panels. Additionally, the vibration system and distribution manifold are arranged to minimize downtime during routine service operations, ensuring that the equipment remains operational with minimal interruptions.

Quality Assurance

Before shipment, each of the 13 units underwent comprehensive factory testing. This included checks on vibration performance, structural inspections, and assembly verification. GN's quality control procedures adhere to internal standards developed specifically for mineral separation equipment, ensuring that every machine delivered meets the project's technical requirements.

GN Separation's Commitment

The deployment of these stack vibrating screens underscores GN Separation's ongoing dedication to providing equipment solutions for mineral classification and fine particle processing. With extensive experience in screening, solid-liquid separation, and mineral concentration support systems, GN strives to deliver equipment that meets operational expectations across projects of varying scales.

GN Separation will continue to provide support to the client throughout the installation, commissioning, and operational phases. The company remains committed to upgrading its product line, developing technologies for fine classification, and serving the mineral processing industries, including ilmenite, zircon, silica sand, and other industrial minerals.

For further details about GN’s stack vibrating screens and mineral separation solutions, please reach out to our technical team or visit our product center.