Recently, GN Separation successfully delivered two sets of 240 m³/h trenchless mud treatment systems to a customer in Australia. Each system is designed to efficiently process drilling and trenchless construction mud, ensuring effective recycling and reuse.
Each System Includes:
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One 11.5 m mud tank
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Two desander cyclones
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Ten 5-inch desilter cyclones
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Three sand pumps
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One mixing hopper
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One agitator
These systems are designed for trenchless drilling and horizontal directional drilling (HDD) projects, where efficient solids control and fluid recovery are critical for cost reduction and environmental compliance.
Double-Deck Vibrating Screens — The Core Equipment
Each mud treatment system is equipped with two double-deck vibrating screens, which serve as the key equipment for primary solids separation. The vibrating screens remove large solids from the drilling mud, ensuring that the downstream desander and desilter units receive mud with lower solids content, thus improving the overall separation performance.
Technical Features
The double-deck vibrating screen shares design concepts with GN’s high-performance vibrating screen range, as described on GN Solids Australia’s website. The main technical features include:
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Double-Deck Structure:
Two screening decks are driven by a single vibration source, providing larger screening area and enabling two-stage separation or finer solids removal within limited space. -
Linear Vibration Motion:
The screen box operates in a linear motion pattern, ensuring efficient material conveyance and effective solids discharge. This motion type is ideal for treating slurry and liquid-solid mixtures. -
High-Quality Polyurethane (PU) Screens:
PU screens offer excellent wear resistance, elasticity, and self-cleaning properties. The high open area (typically 28–45%) ensures efficient screening while minimizing blinding. -
Compact and Space-Saving Design:
The double-deck design allows higher processing capacity within a smaller footprint — an important advantage at job sites with limited space. -
Dual-Motor Self-Synchronization Drive:
Two vibration motors work in self-synchronization to ensure stable operation and uniform vibration, reducing maintenance and energy consumption. -
Anti-Corrosion and Wear-Resistant Surface Treatment:
The screen box is treated with sandblasting, heavy-duty anti-corrosion coating, and a polyurea wear layer on surfaces exposed to mud, ensuring long service life in harsh field environments.
Application Advantages in This Project
The inclusion of double-deck vibrating screens in this system offers several operational benefits:
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Higher Primary Solids Removal Efficiency:
Coarse solids are quickly separated, reducing the solids loading on the desander and desilter units, and improving the overall treatment performance. -
Reduced Footprint and Structural Height:
Compared with two single-layer screens, the double-deck design saves space while maintaining large screening capacity — ideal for compact trenchless job sites. -
Stable and Continuous Operation:
Linear motion and flexible PU screens prevent blinding and ensure consistent performance, minimizing downtime and maintenance needs. -
Energy Efficiency and Easy Maintenance:
The simple structure, synchronized drive, and long-lasting screens help reduce operational and maintenance costs. -
Customizable Design:
The vibrating screen can be customized based on the site’s mud properties (solid content, particle size distribution, viscosity, etc.) by adjusting screen mesh size, vibration amplitude, and feeding mechanism.
Technical Reference
While this project uses double-deck vibrating screens, their design principles align with GN’s multi-deck (2–5 layers) vibrating screens, as shown on the GN Separation official website:
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Screen angle: 17.5°
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Vibration frequency: ~25 Hz
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Double amplitude: 1–2 mm
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Mesh size range: 0.045–2 mm
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Material: Polyurethane or stainless steel mesh
These parameters ensure high efficiency, precision, and stability in fine particle separation.
Operation and Maintenance Recommendations
To achieve the best field performance, GN recommends:
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Even Feeding: Install a buffer box or flow divider at the feed inlet to distribute slurry evenly across both decks.
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Regular Cleaning: For sticky or high-sand-content mud, equip the screen with a spray cleaning system to prevent clogging.
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Screen Inspection: Periodically check screen tension, mesh integrity, and fastening bolts.
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Monitor Vibration System: Keep track of motor temperature, vibration frequency, and amplitude to prevent imbalance.
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Easy Access Maintenance: Design the platform for convenient screen replacement and motor servicing.
Project Highlights & Customer Benefits
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High Processing Capacity: 240 m³/h throughput per system meets demanding trenchless operations.
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Compact Modular Design: Facilitates transportation, installation, and integration with existing job site systems.
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Improved Mud Recycling Efficiency: Ensures better fluid recovery and cleaner mud for reuse, reducing waste disposal costs.
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Reliable and Durable: Built with robust materials and proven GN manufacturing standards.
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Localized Support: GN’s technical and after-sales teams provide professional guidance for installation and commissioning in Australia.
Summary
The successful delivery of these two systems demonstrates GN Separation’s strong capability in providing efficient and reliable trenchless mud treatment solutions. With advanced design, durable equipment, and proven field performance, GN Separation continues to support clients in Australia and worldwide in achieving cleaner, more sustainable construction operations.
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Published: 31 October 2025
1. Background – Why screening matters in iron-ore mining
In the domestic (within-country) iron-ore mining context, efficient separation and classification of fine particles is increasingly important. After primary crushing and grinding, a high fraction of fine material (e.g., sub-2 mm) often needs to be removed or classified before subsequent processes (e.g., beneficiation, pelletising, tailings disposal). Using an appropriate vibrating screen for fine material helps to:
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Published: 31 October 2025
This week, GN Separation achieved a significant milestone by successfully assembling four GND5Z1014 Stack Vibrating Screens and conducting comprehensive factory tests. These specialized units, engineered for high-efficiency iron ore screening, are now undergoing rigorous final inspections. They are slated for dispatch to a major domestic iron ore mining operation next month.
The Indispensable Role of Stack Vibrating Screens in Iron Ore Processing
Iron ore stands as the bedrock of global steel production, necessitating rigorous processing to adhere to the exacting quality standards set by modern industries. Screening, a pivotal stage in this process, segregates ore particles by size, thereby optimizing the efficiency of subsequent processing steps. While traditional single-deck vibrating screens have their merits, they often fall short in handling large material volumes with precision, especially when it comes to fine particle separation.
Enter stack vibrating screens, also known as multi-deck screens, which have emerged as a game-changer. By vertically stacking multiple screening decks, these machines efficiently process large material volumes within a single unit. This compact, high-capacity design not only minimizes space requirements but also reduces energy consumption and enhances throughput compared to their single-deck counterparts. For iron ore producers, this translates into higher recovery rates of valuable minerals, lower operational costs, and improved environmental sustainability through reduced waste generation.
Key Features of the GN Stack Vibrating Screen
1. Multi-Deck Efficiency
The GND5Z1014 boasts five independent screening decks, enabling simultaneous separation of materials at varying flow rates, depending on the feed characteristics. This multi-deck configuration ensures optimal screening performance across a wide range of particle sizes.
2. High-Frequency Vibration Technology
Equipped with dual-vibration motors, the screen generates high-frequency, low-amplitude vibrations. This technology effectively prevents blinding and pegging—common challenges in sticky or moisture-laden iron ore applications. The result is consistent screening accuracy, even when processing difficult materials.
3. Robust Construction and Wear Resistance
Built with high-strength steel frames, the GND5Z1014 is designed to withstand the abrasive conditions inherent in iron ore processing. Key components, such as the screen decks, are coated with polyurea to extend their service life and minimize maintenance downtime. This robust construction ensures long-term reliability and performance.
4. Rapid Screen Mesh Replacement
The stack vibrating screen features polyurethane screen mesh, which can be quickly replaced by simply loosening and fastening the screen blocking device. This design significantly reduces downtime during mesh replacement, enhancing overall operational efficiency.
Strategic Implications and Future Prospects
The upcoming deployment of the GND5Z1014 screens highlights GN Separation's commitment to supporting China's strategic mineral security initiatives. With domestic iron ore production under increasing pressure to meet rising steel demand, efficient processing technologies are crucial for maximizing yield from existing reserves.
GN Separation's latest achievement reflects its broader strategy of integrating localized expertise with global technology trends. With the successful launch of various mining screens at its factory, GN Separation is poised to capture a larger market share in the vibrating screen market. The company is dedicated to providing professional and reliable screening solutions for users both domestically and internationally, further solidifying its position as a leader in the industry.
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Published: 31 October 2025
GN Separation has recently and successfully finished assembling and conducting factory tests on four GNLW764 Big Bowl Decanter Centrifuges for a client in Peru. These high-capacity machines, tailored for demanding industrial scenarios, are set to play a pivotal role in the tailings dewatering processes within the mining industry. They aim to tackle challenges related to water conservation, adherence to environmental regulations, and enhancing operational efficiency.
The Significance of Decanter Centrifuges in Mining Tailings Dewatering
Mining operations produce enormous volumes of tailings, which are a mixture of water, fine particles, and residual minerals. Effective treatment of these tailings is essential before disposal or reuse. Conventional tailings management methods, like ponds or dams, are increasingly under scrutiny due to limited space, environmental hazards, and regulatory pressures. In this context, decanter centrifuges have emerged as a game-changing technology, enabling swift and efficient separation of solids from liquids.
GNLW764: Designed for Large-Scale Industrial Applications
The GNLW764 Decanter Centrifuge, GN Separation's flagship model and the largest in its current product range, is engineered to withstand the rigorous demands of high-volume processing. Featuring a 30-inch (764 mm) bowl diameter and a robust construction, this machine is ideally suited for applications such as mining tailings dewatering, tunnel boring machine (TBM) slurry separation, and other industrial processes that require significant throughput.
1. Tungsten Carbide Protection for Enhanced Longevity
Mining environments are highly abrasive, with tailings containing coarse particles that can quickly wear down equipment. To address this issue, GN Separation has applied tungsten carbide coatings to critical components, including the screw conveyor (spiral) blades and solids discharge ports. Tungsten carbide is well-known for its exceptional hardness and resistance to wear and corrosion. These coatings significantly extend the service life of these parts, reducing downtime and maintenance costs. This ensures consistent performance even in the most challenging conditions, providing mining operators with a reliable and durable solution.
2. VFD Control Cabinet for Precision and Safety
The GNLW764 is outfitted with a Variable Frequency Drive (VFD) control cabinet, which allows for precise adjustment of rotational speed to optimize separation efficiency for different feed materials. This flexibility enables operators to customize the centrifuge's performance according to specific process requirements, whether dealing with fine clay particles or coarser minerals. In addition to speed control, the VFD system incorporates real-time monitoring of temperature and vibration levels to ensure safe operation.
Complementary Technology: GNSJY6000 Flocculation Dosing Unit
To further improve dewatering performance, GN Separation suggests pairing the GNLW764 with its GNSJY6000 Flocculation Dosing Unit. This system automates the injection of flocculants—chemicals that cause fine particles to clump together into larger, more manageable aggregates—into the feed slurry. By optimizing the flocculation process, the combined solution achieves superior solids capture rates and higher water recovery.
Looking Forward
As the global mining sector continues to prioritize sustainability and efficiency, GN Separation's ongoing investments in research and development, along with its global service network, ensure that clients receive not only top-quality equipment but also comprehensive support throughout the equipment lifecycle.
With the GNLW764 Decanter Centrifuges now prepared for dispatch, GN Separation is well-positioned to solidify its reputation as a professional provider of industrial separation technologies, delivering value to clients and contributing to a more sustainable future for the mining industry.
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Published: 24 October 2025
This October, the global mining sector will gather in Beijing for the 21st China Coal & Mining Expo (CCME 2025), a top-tier event focused on propelling advancements in coal and mineral extraction technologies.
Event Overview
Set to run from October 28 to 31, 2025, at the Capital International Convention and Exhibition Center in Shunyi, Beijing, CCME 2025 is expected to draw a diverse range of exhibitors. These include prominent domestic and international manufacturers, technology suppliers, and industry specialists. Over the course of four days, the exhibition will zero in on sustainable mining practices, automation, and equipment innovation, providing attendees with a gateway to the latest and most effective coal mining solutions.
GN Separation's Participation
GN Separation is among the exhibitors and will be stationed at Booth A4601. The company is set to display a range of equipment aimed at tackling key issues in coal preparation, tailings management, and underground mining operations.
1. Large Flip-Flow Vibrating Screen
The centerpiece of GN Separation's exhibit will be its Large Flip-Flow Vibrating Screen, a groundbreaking screening technology tailored for fine-grained and sticky materials. Traditional vibrating screens often encounter problems like clogging and inefficient separation when handling fine coal, wet ore, or materials rich in clay. GN's flip-flow design, however, breaks through these limitations. By integrating a flexible polyurethane screen surface with a double-mass near-resonance working principle, it prevents screen blinding and pegging, ensuring a steady throughput. In the realm of coal mining, this equipment proves especially valuable for pre-screening raw coal before the washing process, thereby easing the load on subsequent operations.
2. Tailing Dewatering Decanter Centrifuge
Tailings disposal stands as one of the most urgent environmental challenges in the mining industry. GN Separation's Tailing Dewatering Decanter offers an eco-friendly solution. It reduces the water content in mine waste, separating solids from liquids to produce a dry, stackable cake. This not only minimizes land use but also lowers the risk of leachate. In coal preparation plants, the decanter centrifuge facilitates the recycling of process water, cutting down on freshwater consumption. With a capacity of up to 100 cubic meters per hour, it is an ideal choice for mid-to-large-scale operations looking to enhance waste management while adhering to ESG (Environmental, Social, and Governance) standards.
3. Underground Coal Sump Slurry Separation System
Underground mining environments present unique hurdles, such as limited space, water inflow, and the urgent need for efficient slurry handling. GN Separation's Underground Coal Sump Slurry Dewatering System addresses these challenges by integrating a compact decanter centrifuge with a pre-screening module. It treats the muddy water generated during roadway tunneling, coal extraction, and dust suppression. The system first separates coarse solids using a screening cyclone combination unit, and then transfers the slurry to a dewatering centrifuge for fine particle separation. This process eliminates the need for manual sump dredging, ensures smooth mine drainage, and supports safe, efficient, and eco-friendly mining practices. Typically designed in a modular fashion, the system is easy to transport, install, and relocate, enabling mobile use.
GN Separation: Leading the Way to a Sustainable Mining Future
With over ten years of experience in separation technologies, GN Separation has cemented its reputation as a reliable partner for mining companies across the globe. Its participation in CCME 2025 underscores its commitment to innovation and customer-focused design. Visitors to Booth A4601 will have the chance to interact with technical experts, witness live demonstrations, and explore customized solutions tailored to their specific operational requirements. We warmly invite you to visit GN at the expo.
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Published: 19 October 2025
GN Separation is pleased to announce our participation in The China Coal & Mining Expo (CCME) 2025, which will be held from October 28 to 31, 2025, at the Capital International Convention and Exhibition Center (Shunyi, Beijing). We sincerely invite all our partners and visitors from the mining and industrial sectors to visit Booth A4601 to explore our advanced solid-liquid separation solutions.
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Published: 17 October 2025