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.

This week, GN Separation successfully completed the assembly of four GNLW224 decanter centrifuges, along with their matching polymer dosing units, at its manufacturing plant. These pieces of equipment are slated to undergo a final inspection and acceptance test conducted by an overseas client next week.

Product Overview

The GNLW224 is the smallest-capacity model in GN Separation's lineup of decanter centrifuges specifically tailored for wastewater treatment applications. It is ingeniously engineered to deliver dependable performance even in compact spaces. Operating at a maximum rotational speed of 5,000 RPM, this centrifuge can efficiently separate solid and liquid phases from a wide range of industrial and municipal wastewater streams.

Each centrifuge comes equipped with a 3-variable-frequency drive (VFD) control cabinet. This advanced feature empowers operators to fine-tune crucial parameters, such as bowl speed, differential speed, and feed pump flow rate. By doing so, they can optimize processing conditions according to the unique characteristics of the materials being treated and specific operational needs.

Integrated Polymer Dosing Units for Enhanced Efficiency

To further boost overall treatment efficiency, the centrifuges are paired with GN Separation's polymer dosing units. These units are designed to precisely introduce flocculating agents into the wastewater stream. The addition of these agents through chemical conditioning promotes particle aggregation, which in turn makes the separation of suspended solids during centrifugation more effective. The synchronized operation of the centrifuges and dosing systems enables end-users to achieve higher solid-liquid separation rates and produce clearer effluent. This not only reduces the workload for downstream processing but also minimizes the environmental impact.

Compact Design and Robust Construction

The GNLW224 boasts a compact footprint, allowing it to be seamlessly integrated into existing plant layouts without the need for extensive modifications. This is a significant advantage for facilities looking to upgrade outdated equipment or expand their capacity within limited space. Moreover, its robust construction, featuring corrosion-resistant materials and wear-resistant components, ensures long-lasting durability. It can withstand demanding operational conditions, such as high-temperature environments or those involving abrasive sludge.

Upcoming Client Inspection Details

The upcoming client inspection will involve a comprehensive testing process for the assembled units. This includes verifying rotational speeds, water test flow rates, vibration levels, and the rise in main bearing temperature, among other parameters. GN Separation's technical team will work closely with the client's engineers during the inspection. They will demonstrate the system's capabilities and address any specific concerns the client may have regarding the integration of the new equipment with their existing infrastructure.

Market Position and Future Prospects

In recent years, there has been a steady increase in demand for compact and energy-efficient wastewater treatment technologies. This trend is driven by stricter environmental regulations and growing industrialization in emerging markets. GN Separation's decanter centrifuge is well-positioned to take advantage of this market opportunity. It offers a cost-effective alternative to larger, more complex systems without sacrificing performance. With production lines now gearing up to meet the expected demand, GN Separation is solidifying its position as a competitive player in the global wastewater treatment equipment sector.