Ports handling iron ore face constant challenges: large throughput, abrasive materials, high moisture content, and the need for stable, continuous operation. To meet these requirements, one batch of GN mining vibrating screens has recently been supplied for iron ore separation and dewatering applications at a port facility, improving both efficiency and reliability compared with traditional screening solutions.

Project Overview

This project adopts a combination of high-frequency fine screening and large linear dewatering screening, designed to replace conventional rotary drum screens and enhance overall process performance:

• High Frequency Fine Vibrating Screen GNFG1232
  Used for slag separation, replacing traditional rotary drum screens.
  Equipped with an undersize collection chute for clean and efficient material handling.

• Large Linear Vibrating Screen GNLSZ3061
  Used for dewatering of screened iron ore materials, ensuring lower moisture content and improved downstream transport and storage.

This configuration is particularly suitable for port operations, where space, uptime, and processing efficiency are critical.

---

High Frequency Fine Vibrating Screen GNFG1232

The GNFG1232 high-frequency fine vibrating screen is designed for precise separation of fine particles. Compared with rotary drum screens, it offers:

• Higher screening efficiency for fine materials

• Compact structure and lower maintenance requirements

• Better adaptability to wet and sticky iron ore conditions

By integrating an undersize collection chute, the GNFG1232 allows smooth discharge of fine materials into the next process step, reducing spillage and simplifying site layout.

---

Large Linear Vibrating Screen GNLSZ3061 for Dewatering

The GNLSZ3061 large linear vibrating screen plays a key role in the dewatering stage. GN large linear vibrating screens are mainly composed of:

• Box-type vibration exciter

• Screen box

• Vibration damping springs

• Support structure

• Driving device

The vibration trajectory is linear, and the screen can be installed horizontally or at a slight inclination, depending on site conditions and process requirements.

These screens are widely used in:

• Wet classification

• Dewatering

• Demineralization

• Tailings dry discharge

across industries such as mineral processing, coal preparation, aggregates, building materials, and chemical processing.

Screen structures are available in single-deck or double-deck designs, and models can be customized according to customer requirements.

---

Technical Parameters (Reference)

Large Linear Vibrating Screen – Single Deck

• Screen area: up to 31.39 m²

• Vibration frequency: 14–16 Hz

• Double amplitude: 7–10 mm

• Mesh size range: 0.2–25 mm

• Capacity: up to 900 t/h (depending on model and conditions)

Large Linear Vibrating Screen – Double Deck

• Screen area: up to 31.39 m² × 2

• Capacity: up to 950 t/h (depending on model and conditions)

Note: The above parameters are for reference only and can be adjusted according to actual operating conditions. Final technical agreements and quotations shall prevail.

---

Features and Advantages of GN Large Linear Vibrating Screens

GN large linear vibrating screens are designed for heavy-duty mining and port environments, offering the following advantages:

• Non-welded side plates made from high-strength alloy steel, assembled with imported Huck rivets, eliminating welding residual stress

• Finite element analysis (FEA) to optimize structure and vibration parameters, avoiding resonance and extending service life

• Rectangular tube cross-beam design with lightweight, high-strength exciter beam structure

• Post-weld heat treatment on main components to effectively relieve internal stress

• Polyurea spray coating on beams for superior corrosion and wear resistance; optional rubber protection for high-impact areas

• High-efficiency helical gearbox-type exciters with large excitation force, low noise, stable operation, and long service life

• Adjustable amplitude by changing eccentric block counterweights

• Modular polyurethane screen panels, offering easy replacement and strong versatility across different applications

---

Working Principle

GN large linear vibrating screens are equipped with two gearbox vibrators operating under the principle of forced synchronization. Under excitation:

1. The screen body performs linear reciprocating motion.

2. Vibratory force is transmitted to the material layer, throwing the material upward for stratification and separation.

3. Material is continuously fed onto the screen surface, classified according to particle size.

4. Oversize and undersize materials are discharged separately into corresponding launders and sent to the next process stage.

The angle between the excitation force direction and the horizontal plane can be designed based on material characteristics. This angle directly affects material travel speed and overall processing capacity.

---

Conclusion

By combining the GNFG1232 high-frequency fine vibrating screen with the GNLSZ3061 large linear vibrating screen, this port iron ore project achieves:

• Replacement of inefficient rotary drum screens

• Improved slag separation accuracy

• Effective dewatering performance

• Higher throughput and lower maintenance costs

This solution demonstrates GN’s capability to deliver robust, customized screening equipment for demanding port and mining applications.